52639 + Interview Questions in Secondary School in Chemistry

1.	Electronic configuration of first 20 elements
Answer» Answer:Back HomeSearch for: ELECTRONIC CONFIGURATION OF FIRST 20 ELEMENTS : 1 .Hydrogen - 1s1 2. Helium - 1s2 3. Lithium - [He]2s1 4. Beryllium - [He]2s2 5. BORON - [He]2s22p1 6.Carbon - [He]2s22p2 7.Nitrogen - [He]2s22p3 8.Oxygen - [He]2s22p4 9. FLUORINE - [He]2s22p5 10 .Neon - [He]2s22p6 11 .Sodium - [Ne]3s1 12 .Magnesium - [Ne]3s2 13 .Aluminum - [Ne]3s23p1 14. Silicon - [Ne]3s23p2 15. Phosphorus - [Ne]3s23p3 16. Sulfur - [Ne]3s23p4 17 .Chlorine - [Ne]3s23p5 18. Argon - [Ne]3s23p6 19 .Potassium - [Ar]4s1 20.Calcium - [Ar]4s2 Mark as Brainliest Answer

1.

Electronic configuration of first 20 elements

Answer»

Answer:Back HomeSearch for: ELECTRONIC CONFIGURATION OF FIRST 20 ELEMENTS :

1 .Hydrogen - 1s1

2. Helium - 1s2

3. Lithium - [He]2s1

4. Beryllium - [He]2s2

5. BORON - [He]2s22p1

6.Carbon - [He]2s22p2

7.Nitrogen - [He]2s22p3

8.Oxygen - [He]2s22p4

9. FLUORINE - [He]2s22p5

10 .Neon - [He]2s22p6

11 .Sodium - [Ne]3s1

12 .Magnesium - [Ne]3s2

13 .Aluminum - [Ne]3s23p1

14. Silicon - [Ne]3s23p2

15. Phosphorus - [Ne]3s23p3

16. Sulfur - [Ne]3s23p4

17 .Chlorine - [Ne]3s23p5

18. Argon - [Ne]3s23p6

19 .Potassium - [Ar]4s1

20.Calcium - [Ar]4s2

Mark as Brainliest Answer

Discussion

2.	Define functional group and why it is called functional group?
Answer» Explanation: In organic chemistry, functional groups are specific substituents or moieties WITHIN molecules that may be responsible for the CHARACTERISTIC chemical reactions of those molecules. ... Functional groups are groups of one or more atoms of DISTINCTIVE chemical PROPERTIES no MATTER what they are attached to.

2.

Define functional group and why it is called functional group?

Answer»

Explanation:

In organic chemistry, functional groups are specific substituents or moieties WITHIN molecules that may be responsible for the CHARACTERISTIC chemical reactions of those molecules. ... Functional groups are groups of one or more atoms of DISTINCTIVE chemical PROPERTIES no MATTER what they are attached to.

Discussion

3.	Plz helpand also explain it a bitit's really Confussing for me thanks in advance...
Answer» Answer: Li-Na Explanation: Li-Na is incorrect because __________________________ Li - lithium _____________ it is an INERT or nobal gases it is an inert or nobal gasesit doesn't carry any valency ( valency - 0) Na - Sodium ______________ it is a metal , it is a metal ,it CARRIES valency ( valency - 1 ) *extra* *information*- some valency of some elements are** elements valency elements valencyH 1 elements valencyH 1 S 4 elements valencyH 1 S 4Be 2 elements valencyH 1 S 4Be 2B 4 elements valencyH 1 S 4Be 2B 4AL 3 elements valencyH 1 S 4Be 2B 4Al 3O 2 elements valencyH 1 S 4Be 2B 4Al 3O 2C 4 elements valencyH 1 S 4Be 2B 4Al 3O 2C 4Mg 2 _____________________ ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ so I hope you have understood the correct answer ✓✓✓✓✓✓✓✓✓✓✓

3.

Plz helpand also explain it a bitit's really Confussing for me thanks in advance...

Answer»

Answer:

Li-Na

Explanation:

Li-Na is incorrect because

__________________________

Li - lithium

_____________

it is an INERT or nobal gases

it is an inert or nobal gasesit doesn't carry any valency ( valency - 0)

Na - Sodium

______________

it is a metal ,

it is a metal ,it CARRIES valency ( valency - 1 )

extra *information***-

some valency of some elements are

elements valency

elements valencyH 1

elements valencyH 1 S 4

elements valencyH 1 S 4Be 2

elements valencyH 1 S 4Be 2B 4

elements valencyH 1 S 4Be 2B 4AL 3

elements valencyH 1 S 4Be 2B 4Al 3O 2

elements valencyH 1 S 4Be 2B 4Al 3O 2C 4

elements valencyH 1 S 4Be 2B 4Al 3O 2C 4Mg 2

_____________________

✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓

so I hope you have understood the correct answer

✓✓✓✓✓✓✓✓✓✓✓

Discussion

4.	. In a hydrogen atom, the electrons fall from fifth orbit to the second orbit. Calculate the frequency and wavelength of the radiation emitted in this radiation. (Value of R = 109714 cm-1).
Answer» Answer:WAVELENGTH of photon emitted DUE to electronic transition from n1=3 to n2=2 of HYDROGEN atom λ1=R(n221−n121) ∴ λ1=R(221−321) ⟹λ=5R36 Thus FREQUENCY of photon ν=λC=365RC

4.

. In a hydrogen atom, the electrons fall from fifth orbit to the second orbit. Calculate the frequency and wavelength of the radiation emitted in this radiation. (Value of R = 109714 cm-1).

Answer»

Answer:WAVELENGTH of photon emitted DUE to electronic transition from n1=3 to n2=2 of HYDROGEN atom

λ1=R(n221−n121)

∴ λ1=R(221−321) ⟹λ=5R36

Thus FREQUENCY of photon ν=λC=365RC

Discussion

5.	Are(2.) Why alkaneschemicaly inerte?A)They are stable in nature and not react with alkali metals ,oxidents and other element under ordinary condition
Answer» Answer: because in ALKANES carbon and HYDROGEN have approximately same ELECTRONEGATIVITY . they have only strong pie bond and ATOMS with no partial charges.

5.

Are(2.) Why alkaneschemicaly inerte?A)They are stable in nature and not react with alkali metals ,oxidents and other element under ordinary condition

Answer»

Answer:

because in ALKANES carbon and HYDROGEN have approximately same ELECTRONEGATIVITY .

they have only strong pie bond and ATOMS with no partial charges.

Discussion

6.	Volume of one equivalent of H
Answer» HYDROGEN......................

Discussion

7.	What will be the effect on volume if we add 50 ml of Jam-e-Shirin in 200 ml of water and stir it well?
Answer» ANSWER: I CANT UNDERSTAND the QUESTION brooo

7.

What will be the effect on volume if we add 50 ml of Jam-e-Shirin in 200 ml of water and stir it well?

Answer»

ANSWER:

I CANT UNDERSTAND the QUESTION brooo

Discussion

8.	x mL of 0.5 M HCl aq. solution is mixed with y mL of 0.25 M HCl aq. solution. If 1 L of resultant solution is formed having 0.4 M w.r.t. HCl, then x and y are respectively
Answer» Answer: X ml search in net Explanation: STUDY of such topics as QUANTITY (number theory), structure (algebra) , space (GEOMETRY), and CHANGE ...

8.

x mL of 0.5 M HCl aq. solution is mixed with y mL of 0.25 M HCl aq. solution. If 1 L of resultant solution is formed having 0.4 M w.r.t. HCl, then x and y are respectively

Answer»

Answer:

X ml search in net

Explanation:

STUDY of such topics as QUANTITY (number theory), structure (algebra) , space (GEOMETRY), and CHANGE ...

Discussion

9.	Is melting acup a physical change
Answer» ANSWER: No it is a CHEMICAL change. Mark as BRAINLIEST Answer ️

9.

Is melting acup a physical change

Answer»

ANSWER:

No it is a CHEMICAL change.

Mark as BRAINLIEST Answer ️

Discussion

10.	Differentiate between Synthesis & Substitution reaction
Answer» $\huge \mathcal \blue{AnSwEr}$ The main difference between addition and SUBSTITUTION reactions is that addition reactions involve the COMBINATION of two or more atoms or FUNCTIONAL GROUPS whereas substitution reactions involve the displacement of an atom or a functional group by ANOTHER functional group. Hope it helps you ✨ Be Brainly ✌️

10.

Differentiate between Synthesis & Substitution reaction

Answer»

$\huge \mathcal \blue{AnSwEr}$

The main difference between addition and SUBSTITUTION reactions is that addition reactions involve the COMBINATION of two or more atoms or FUNCTIONAL GROUPS whereas substitution reactions involve the displacement of an atom or a functional group by ANOTHER functional group.

Hope it helps you ✨

Be Brainly ✌️

Discussion

11.	Write in brief an activity to show the particular nature of matter
Answer» HEY mate:) here is your answer DISSOLVE SALT in water, the particles of salt get into the spaces between particles of water. This shows the particulate nature of MATTER. (i) They have space between them. (II) They are continuously moving. thanks⛧

11.

Write in brief an activity to show the particular nature of matter

Answer»

HEY mate:)

here is your answer

DISSOLVE SALT in water, the particles of salt get into the spaces between particles of water. This shows the particulate nature of MATTER. (i) They have space between them. (II) They are continuously moving.

thanks⛧

Discussion

12.	The acylic Compound is
Answer» ANSWER: Open-chain compound Explanation: In CHEMISTRY, an open-chain compound or acyclic compound is a compound with a LINEAR STRUCTURE, RATHER than a cyclic one. An open-chain compound having no side chains is called a straight-chain compound. Mark as Brainliest Answer ️

12.

The acylic Compound is

Answer»

ANSWER:

Open-chain compound

Explanation:

In CHEMISTRY, an open-chain compound or acyclic compound is a compound with a LINEAR STRUCTURE, RATHER than a cyclic one. An open-chain compound having no side chains is called a straight-chain compound.

Mark as Brainliest Answer ️

Discussion

13.	Tincture of iodine is made by dissolving *
Answer» TINCTURE of IODINE is MADE by DISSOLVING iodine in ALCOHOL.

13.

Tincture of iodine is made by dissolving *

Answer»

TINCTURE of IODINE is MADE by DISSOLVING iodine in ALCOHOL.

Discussion

14.	2.The ionic radius of a cation is alwaysa) less than atomic radiusc) equal to atomic radiusb) more than atomic radiusd) cannot be predicted
Answer» ANSWER: (a) more than atomic radius

14.

2.The ionic radius of a cation is alwaysa) less than atomic radiusc) equal to atomic radiusb) more than atomic radiusd) cannot be predicted

Answer»

ANSWER:

(a) more than atomic radius

Discussion

15.	7.45 grams of KCL s dissolved in 100 grams of water.whaat will be the molality of the solution
Answer» Answer: 1 MOLE/kg. Explanation: Molality is DEFINED as the number of moles of SOLUTE present in 1kg of solvent. and is denoted by m. Thus, molality(m) = No. of moles of solute / Mass of solvent. Here, solute is 7.45 grams of KCl and solvent is 100 grams of water = 0.1 kg GMW of KCl= 39+35.5=74.5g Moles of KCl: 74.5 g of KCl = 1 mole (for any weight) then, 7.45 g of KCl = X moles x =7.45 x 1/74.5 x=0.1 mole. So, molality(m) = No. of moles of solute / Mass of solvent molality= 0.1/0.1 = 1 mole/kg. (Remember that the numerator PART of the formula is moles and not mass) Hope it helps:) All the best!!!

15.

7.45 grams of KCL s dissolved in 100 grams of water.whaat will be the molality of the solution

Answer»

Answer:

1 MOLE/kg.

Explanation:

Molality is DEFINED as the number of moles of SOLUTE present in 1kg of solvent.

and is denoted by m.

Thus, molality(m) = No. of moles of solute / Mass of solvent.

Here, solute is 7.45 grams of KCl and solvent is 100 grams of water = 0.1 kg

GMW of KCl= 39+35.5=74.5g

Moles of KCl:

74.5 g of KCl = 1 mole (for any weight)

then, 7.45 g of KCl = X moles

x =7.45 x 1/74.5

x=0.1 mole.

So, molality(m) = No. of moles of solute / Mass of solvent

molality= 0.1/0.1

= 1 mole/kg.

(Remember that the numerator PART of the formula is moles and not mass)

Hope it helps:)

All the best!!!

Discussion

16.	Find the number of atoms per unit cell inthe following Crystal structures) simple cubic ② Body centred cubic3) face centred cubic
Answer» The number of ATOMS per unit cell in a simple CUBIC, face-centered cubic and body-centred cubic are ...... respectively. see here here will be OPTIONS if they will be question LIKE this then the options with their and the the options are A. 1,4,2 B. 4,1,2 C. 2,4,1 D. 4,8,2 And right answer will be option number A 1,4,2

16.

Find the number of atoms per unit cell inthe following Crystal structures) simple cubic ② Body centred cubic3) face centred cubic

Answer»

The number of ATOMS per unit cell in a simple CUBIC, face-centered cubic and body-centred cubic are ...... respectively. see here here will be OPTIONS if they will be question LIKE this then the options with their and the the options are

A. 1,4,2

B. 4,1,2

C. 2,4,1

D. 4,8,2

And right answer will be option number A 1,4,2

Discussion

17.	Name- ability of a substance to be drown or pulled through a small opening to make a wire
Answer» ANSWER: Ductility Explanation: Explanation:The PROPERTY of metals by virtue of which they can be drawn into WIRES is CALLED ductility.

17.

Name- ability of a substance to be drown or pulled through a small opening to make a wire

Answer»

ANSWER:

Ductility

Explanation:

Explanation:The PROPERTY of metals by virtue of which they can be drawn into WIRES is CALLED ductility.

Discussion

18.	100 ppm solution is prepared by doing mgso4 in h2o mass of solution approximately is
Answer» Answer: 100 PPM solution is PREPARED by doing MGSO4 in H2O mass of solution approximately is. Bhargabi5143 is waiting for your help. Explanation: please MARK as brainlist....

18.

100 ppm solution is prepared by doing mgso4 in h2o mass of solution approximately is

Answer»

Answer:

100 PPM solution is PREPARED by doing MGSO4 in H2O mass of solution approximately is. Bhargabi5143 is waiting for your help.

Explanation:

please MARK as brainlist....

Discussion

19.	Which is a better fuel between cow dung and LPG?WHY?
Answer» Fuel is the source of heat. must not produce any HARMFUL gases while burning When COMPARED to cow dung and coal, LPG has all the above qualities. It has more CALORIFIC VALUE than cow dung which means it produces more heat. It can burn EASILY leaving behind no harmful gas.

19.

Which is a better fuel between cow dung and LPG?WHY?

Answer»

Fuel is the source of heat. must not produce any HARMFUL gases while burning When COMPARED to cow dung and coal, LPG has all the above qualities. It has more CALORIFIC VALUE than cow dung which means it produces more heat. It can burn EASILY leaving behind no harmful gas.

Discussion

20.	Write the IUPAC name of the following compounds.CH3- CH- CH- CH- CH-CH3\| \| \| \|CH3 OH C2H5 OH
Answer» Answer: 1.hexane 2.methano 3.ethanol I GUESS this is what you want or 4ethylheptan3,5diol

20.

Write the IUPAC name of the following compounds.CH3- CH- CH- CH- CH-CH3| | | |CH3 OH C2H5 OH

Answer»

Answer:

1.hexane

2.methano

3.ethanol

I GUESS this is what you want

or

4ethylheptan3,5diol

Discussion

21.	A solution of a substance containing 1.05g per 100mL was found to be isotonic with 3% glucose solution the molecular mass of substance is
Answer» ANSWER: isotonic MEANS osmotic PRESSURE is the same for both. since OP=cRT c is CONCENTRATION,we can EQUATE both the concentration terms. so 3/180=1.05/M so M=63u hope it helps. please mark me as the brainliest.

21.

A solution of a substance containing 1.05g per 100mL was found to be isotonic with 3% glucose solution the molecular mass of substance is

Answer»

ANSWER:

isotonic MEANS osmotic PRESSURE is the same for both.

since OP=cRT

c is CONCENTRATION,we can EQUATE both the concentration terms.

so 3/180=1.05/M

so M=63u

hope it helps.

please mark me as the brainliest.

Discussion

22.	The concentration (w/w)% of a 200g solution of common salt is 10%. if 20g more water is mixed in it then it's concentration becomes(I) 10.10%(2) 11.11%(3) 9.99%(4) 9.09%
Answer» ANSWER: CVFFRVFB Explanation: OPTION A

22.

The concentration (w/w)% of a 200g solution of common salt is 10%. if 20g more water is mixed in it then it's concentration becomes(I) 10.10%(2) 11.11%(3) 9.99%(4) 9.09%

Answer»

ANSWER:

CVFFRVFB

Explanation:

OPTION A

Discussion

23.	Liquid benzene (C6H6) burns in oxygen according to the equation : 2C6 H6 (l) + 15O2 ( g ) ---> 12CO 2 ( g ) + 6H 2 O( g ).How many litres of O2 at STP are needed to complete the combustion of 39 g of liquid benzene?(Mol. wt. of O2 = 32, C6H6 = 78
Answer» Answer: 84 litres of O2 required Plzz refer to the attachment.... I hope it HELPS U my FRND

23.

Liquid benzene (C6H6) burns in oxygen according to the equation : 2C6 H6 (l) + 15O2 ( g ) ---> 12CO 2 ( g ) + 6H 2 O( g ).How many litres of O2 at STP are needed to complete the combustion of 39 g of liquid benzene?(Mol. wt. of O2 = 32, C6H6 = 78

Answer»

Answer:

84 litres of O2 required

Plzz refer to the attachment....

I hope it HELPS U my FRND

Discussion

24.	Bonding alters the properties of elements. Explain this statement by giving examples.
Answer» ANSWER: ফটফট হও না করে এবং তারা আমার সাথে কথা কককককককককক চকচকে কখন কি ভাবে কোরিওলিস প্রভাব বাড়ছে এবং EXPLANATION: খখখটটীঅংষবনঁঅংউ থানার ভারপ্রাপ্ত কর্মকর্তাকে ডিআইজি পদে পদোন্নতি রাজধানীতে

24.

Bonding alters the properties of elements. Explain this statement by giving examples.

Answer»

ANSWER:

ফটফট হও না করে এবং তারা আমার সাথে কথা কককককককককক চকচকে কখন কি ভাবে কোরিওলিস প্রভাব বাড়ছে এবং

EXPLANATION:

খখখটটীঅংষবনঁঅংউ থানার ভারপ্রাপ্ত কর্মকর্তাকে ডিআইজি পদে পদোন্নতি রাজধানীতে

Discussion

25.	What is the bond angle and structure of becl2?
Answer» ANSWER: • It is a hypovalent compoud • BOND ANGLE is 180° • It EXISTS in diamar from • Hybridisation of be in BeCl2 in sp2 ( have 6e - at centre

25.

What is the bond angle and structure of becl2?

Answer»

ANSWER:

• It is a hypovalent compoud

• BOND ANGLE is 180°

• It EXISTS in diamar from

• Hybridisation of be in BeCl2 in sp2 ( have 6e - at centre

Discussion

26.	An Organic Compound chas C=40% and water=40%then empherical formula will beCH2OC2H2OC3H2OC4H2O
Answer» ANSWER: the answer is c) C4H2O Explanation: PLEASE FOLLOW ME IF YOU FOLLOW ME THEN I FOLLOWED YOU BACK PLEASE MARK ME AS BRAINLIAST

26.

An Organic Compound chas C=40% and water=40%then empherical formula will beCH2OC2H2OC3H2OC4H2O

Answer»

ANSWER:

the answer is c) C4H2O

Explanation:

PLEASE FOLLOW ME

IF YOU FOLLOW ME

THEN I FOLLOWED YOU BACK

PLEASE MARK ME AS BRAINLIAST

Discussion

27.	WhatsApp guys !!!❤plz help me to solve tis questionelements a,b,c and d have the following electronic configurations a)1s²,2s²,2p6b)1s²,2s²,2p6,3s²,3p¹c)1s²,2s²,2p6,3s²,3p6d)1s²,2s²,2p¹which elements among these will belong to the same group of periodic tableplz solve this guyz ⚛_⚛and also pls follow me
Answer» ANSWER: Don't KNOW BROTHER so SORRY

27.

WhatsApp guys !!!❤plz help me to solve tis questionelements a,b,c and d have the following electronic configurations a)1s²,2s²,2p6b)1s²,2s²,2p6,3s²,3p¹c)1s²,2s²,2p6,3s²,3p6d)1s²,2s²,2p¹which elements among these will belong to the same group of periodic tableplz solve this guyz ⚛_⚛and also pls follow me

Answer»

ANSWER:

Don't KNOW BROTHER so SORRY

Discussion

28.	Pls answer quickly just keep question number then answer a,b,cd
Answer» IDK the answer plzzzzzzzzzzx MARK THIS ANS AS BRAINLIEST AND PLZ FOLLOW ME PLZ

28.

Pls answer quickly just keep question number then answer a,b,cd

Answer»

IDK the answer

plzzzzzzzzzzx MARK THIS ANS AS BRAINLIEST AND PLZ FOLLOW ME PLZ

Discussion

29.	In a reaction between 10mL water and half a spatula of copper sulfate, the temperature increases by 3 degrees. If 10ml water and a FULL spatula of copper sulfate reacted, would the temperature change be different or the same and why?
Answer» ANSWER: In a reaction between 10mL water and HALF a spatula of COPPER sulfate, the temperature INCREASES by 3 degrees. If 10ml water and a FULL spatula of copper sulfate reacted, would the temperature change be different or the same and why? EXPLANATION: In a reaction between 10mL water and half a spatula of copper sulfate, the temperature increases by 3 degrees. If 10ml water and a FULL spatula of copper sulfate reacted, would the temperature change be different or the same and why?

29.

In a reaction between 10mL water and half a spatula of copper sulfate, the temperature increases by 3 degrees. If 10ml water and a FULL spatula of copper sulfate reacted, would the temperature change be different or the same and why?

Answer»

ANSWER:

In a reaction between 10mL water and HALF a spatula of COPPER sulfate, the temperature INCREASES by 3 degrees. If 10ml water and a FULL spatula of copper sulfate reacted, would the temperature change be different or the same and why?

EXPLANATION:

In a reaction between 10mL water and half a spatula of copper sulfate, the temperature increases by 3 degrees. If 10ml water and a FULL spatula of copper sulfate reacted, would the temperature change be different or the same and why?

Discussion

30.	हमारे राष्ट्र ध्वज 'तिरंगा' के तीन रंग किसके पृतीक है
Answer» ANSWER: राष्ट्रध्वज के निर्माताओं ने देश को एक सूत्र में बांधने के लिए बहुत सोच-समझकर इन तीन रंगो और अशोक चक्र का उपयोग किया। केसरिया रंग को साहस और बलिदान का प्रतीक माना जाता है। सफेद रंग सच्चाई, शांति और पवित्रता की न‍िशानी है। हरे रंग को सन्पन्नता का प्रतीक माना जाता है।

30.

हमारे राष्ट्र ध्वज 'तिरंगा' के तीन रंग किसके पृतीक है

Answer»

ANSWER:

राष्ट्रध्वज के निर्माताओं ने देश को एक सूत्र में बांधने के लिए बहुत सोच-समझकर इन तीन रंगो और अशोक चक्र का उपयोग किया।

केसरिया रंग को साहस और बलिदान का प्रतीक माना जाता है।

सफेद रंग सच्चाई, शांति और पवित्रता की न‍िशानी है।

हरे रंग को सन्पन्नता का प्रतीक माना जाता है।

Discussion

31.	Vayu mein avastha mein oxygen aane nitrogen ratio.
Answer» ANSWER: RATIO of OXYGEN and NITROGEN is 1:4

31.

Vayu mein avastha mein oxygen aane nitrogen ratio.

Answer»

ANSWER:

RATIO of OXYGEN and NITROGEN is 1:4

Discussion

32.	For rigid non elastic rotator
Answer» It's a INCOMPLETE QUESTION....

Discussion

33.	Assertion- pH of rain water is 6, it is called acid rain. Reason- pH is less than 7 ———> acidic solution.
Answer» Answer: ASSERTION is INCORRECT because the ACID rain of ph 6 but should be very less acidic because ph is lower than 7 and very close to 7 therefore reason is CORRECT

33.

Assertion- pH of rain water is 6, it is called acid rain. Reason- pH is less than 7 ———> acidic solution.

Answer»

Answer:

ASSERTION is INCORRECT because the ACID rain of ph 6 but should be very less acidic because ph is lower than 7 and very close to 7 therefore reason is CORRECT

Discussion

34.	Identify the substance getting oxidised , getting reduced, oxidixing and reducing agent
Answer» Answer: the substance oxidized is H3AsO3, SINCE the OXIDATION number of As goes from +3 to +5, the substance reduced is HNO3, with the oxidation number of N going from +5 to +2, the oxidizing agent is the substance reduced ( HNO3) and the reducing agent is the substance oxidized (H3AsO3) EXPLANATION:

34.

Identify the substance getting oxidised , getting reduced, oxidixing and reducing agent

Answer»

Answer:

the substance oxidized is H3AsO3, SINCE the OXIDATION number of As goes from +3 to +5, the substance reduced is HNO3, with the oxidation number of N going from +5 to +2, the oxidizing agent is the substance reduced ( HNO3) and the reducing agent is the substance oxidized (H3AsO3)

EXPLANATION:

Discussion

35.	Oxygen don't show +4 and +6 oxidation state due to . (a) Inert pair effect (b) small size (c) gaseous nature (d) absence of vacant d- orbital .
Answer» EXPLANATION: due to SMALL SIZE oxygen not SHOW +4 and +6

35.

Oxygen don't show +4 and +6 oxidation state due to . (a) Inert pair effect (b) small size (c) gaseous nature (d) absence of vacant d- orbital .

Answer»

EXPLANATION:

due to SMALL SIZE oxygen not SHOW +4 and +6

Discussion

36.	11) પરિવર્તન ત્રણ તબક્કામાં આપો:ક્લોરોબેન્ઝિનમાંથી બેન્કોનાઈટ્રાઈલ
Answer» ANSWER: hmm what LANGUAGE is it? EXPLANATION: can you TELL

36.

11) પરિવર્તન ત્રણ તબક્કામાં આપો:ક્લોરોબેન્ઝિનમાંથી બેન્કોનાઈટ્રાઈલ

Answer»

ANSWER:

hmm

what LANGUAGE is it?

EXPLANATION:

can you TELL

Discussion

37.	Why molecularity cannot be obtained from rate equation of simple reaction
Answer» Answer: ???????? Explanation: Molecularity in chemistry is the number of MOLECULES that come TOGETHER to react in an elementary (single-step) REACTION[1] and is equal to the sum of stoichiometric coefficients of reactants in this elementary reaction.[2] Depending on how many molecules come together, a reaction can be UNIMOLECULAR, bimolecular or trimolecular. The kinetic order of any elementary reaction or reaction step is equal to its molecularity, and the rate equation of an elementary reaction can therefore be determined by inspection, from the molecularity.[1] The kinetic order of a complex (multistep) reaction, however, cannot be equated to molecularity since molecularity only describes elementary REACTIONS or steps. please mark me as a brainlist

37.

Why molecularity cannot be obtained from rate equation of simple reaction

Answer»

Answer:

????????

Explanation:

Molecularity in chemistry is the number of MOLECULES that come TOGETHER to react in an elementary (single-step) REACTION[1] and is equal to the sum of stoichiometric coefficients of reactants in this elementary reaction.[2] Depending on how many molecules come together, a reaction can be UNIMOLECULAR, bimolecular or trimolecular.

The kinetic order of any elementary reaction or reaction step is equal to its molecularity, and the rate equation of an elementary reaction can therefore be determined by inspection, from the molecularity.[1]

The kinetic order of a complex (multistep) reaction, however, cannot be equated to molecularity since molecularity only describes elementary REACTIONS or steps.

please mark me as a brainlist

Discussion

38.	why bottom portion of window glass in old building found to thicker than top portion? answer must be based on amorphous solid
Answer» Explanation: Because glass is amorphous solid . amorphous solids have property to flow LIKE 'liquid'. ... Glass panes fixed to windows or doors of old buildings are INVARIABLY found to be THICKER at the bottom than at the top. This is because the glass flows down very slowly and makes the bottom PORTION slightly thicker.

38.

why bottom portion of window glass in old building found to thicker than top portion? answer must be based on amorphous solid

Answer»

Explanation:

Because glass is amorphous solid . amorphous solids have property to flow LIKE 'liquid'. ... Glass panes fixed to windows or doors of old buildings are INVARIABLY found to be THICKER at the bottom than at the top. This is because the glass flows down very slowly and makes the bottom PORTION slightly thicker.

Discussion

39.	Pls ans pls ans pls ans pls ans pls ans
Answer» Answer: The Law of Conservation of MASS dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any ONE ELEMENT at the BEGINNING of a reaction will equal the mass of that element at the end of the reaction. Explanation: please please mark me as brainliest.

39.

Pls ans pls ans pls ans pls ans pls ans

Answer»

Answer:

The Law of Conservation of MASS dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any ONE ELEMENT at the BEGINNING of a reaction will equal the mass of that element at the end of the reaction.

Explanation:

please please mark me as brainliest.

Discussion

40.	What is the symbol of iron????
Answer» Fe Is your ANSWER.. HOPE it will HELP :)

40.

What is the symbol of iron????

Answer»

Fe

Is your ANSWER..

HOPE it will HELP :)

Discussion

41.	6) Whichshouldof the following a queensaqueens Solutionshave the highest it boiling point ?
Answer» Answer: OPTION dear PLS ASK .. but with option k

41.

6) Whichshouldof the following a queensaqueens Solutionshave the highest it boiling point ?

Answer»

Answer:

OPTION dear PLS ASK .. but with option k

Discussion

42.	Write three differences between physical change and chemical change
Answer» Answer: The DIFFERENCE between a physical REACTION and a chemical reaction is COMPOSITION. In a chemical reaction, there is a CHANGE in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a SAMPLE of matter without a change in composition. $#DEVIL GIRL❤$

42.

Write three differences between physical change and chemical change

Answer»

Answer:

The DIFFERENCE between a physical REACTION and a chemical reaction is COMPOSITION.

In a chemical reaction, there is a CHANGE in the composition of the substances in question;

in a physical change there is a difference in the appearance, smell, or simple display of a SAMPLE of matter without a change in composition.

$#DEVIL GIRL❤$

Discussion

43.	Half life period of a substance is 20 day after 30 days what percentage of the substance will be left
Answer» Answer: 10% EXPLANATION:

43.

Half life period of a substance is 20 day after 30 days what percentage of the substance will be left

Answer»

Answer:

10%

EXPLANATION:

Discussion

44.	What is runshuity?why do we use always ratter than pure metals to electric circuits
Answer» ANSWER: oeiffoldoofpd Explanation: socialised23344432punjabi pubgbanpubgbanpubgbanpubgbanpubgbanpubgbanpubgban OK HONEY

44.

What is runshuity?why do we use always ratter than pure metals to electric circuits

Answer»

ANSWER:

oeiffoldoofpd

Explanation:

socialised23344432punjabi pubgbanpubgbanpubgbanpubgbanpubgbanpubgbanpubgban

OK HONEY

Discussion

45.	Why do we need to clarify elements
Answer» Answer: It enables chemists to predict the PROPERTIES of the ELEMENTS and their compounds based on their positions in the Periodic Table, and VICE versa. It becomes easier to STUDY, understand, COMPARE and contrast the related properties among the elements and their compounds from different groups. Explanation: pls mark me as brainliest

45.

Why do we need to clarify elements

Answer»

Answer:

It enables chemists to predict the PROPERTIES of the ELEMENTS and their compounds based on their positions in the Periodic Table, and VICE versa. It becomes easier to STUDY, understand, COMPARE and contrast the related properties among the elements and their compounds from different groups.

Explanation:

pls mark me as brainliest

Discussion

46.	2 HCL + caco3 gives cacl2 + H2O + CO2 which is getting oxidized and which is getting reduced.
Answer» ANSWER: oxidised Hcl reduced- CACO3

46.

2 HCL + caco3 gives cacl2 + H2O + CO2 which is getting oxidized and which is getting reduced.

Answer»

ANSWER:

oxidised Hcl

reduced- CACO3

Discussion

47.	Explain Vander Waal Radius
Answer» Answer: The VAN der WAALS radius is equal to one half the distance between two unbonded atoms when the electrostatic forces between them are balanced. In other words, it is half of the closest distance between two atoms that aren't bonded or within the same molecule. Picometers (pm) are typically the UNIT used to REPORT the value.

47.

Explain Vander Waal Radius

Answer»

Answer:

The VAN der WAALS radius is equal to one half the distance between two unbonded atoms when the electrostatic forces between them are balanced. In other words, it is half of the closest distance between two atoms that aren't bonded or within the same molecule. Picometers (pm) are typically the UNIT used to REPORT the value.

Discussion

48.	Deffenation of unit factors
Answer» Answer: ☺☺☺☺*hello☺☺☺☺ : a GENE that controls the inheritance of a UNIT character — COMPARE polygene.* ✌✌✌I *hope* *it's* *helpful* *for* *you* ❤❤❤❤ ✌✌✌*please* *mark* me as *BRAINLEAST* ✌✌

48.

Deffenation of unit factors

Answer»

Answer:

☺☺☺☺hello☺☺☺☺

: a GENE that controls the inheritance of a UNIT character — COMPARE polygene.

✌✌✌I hope it's helpful for you ❤❤❤❤

✌✌✌please mark me as BRAINLEAST ✌✌

Discussion

49.	2.7. Henry's law constant for Co, in water is 1.67x108 Pa at 298 K. Calculatethe quantity of Co, in 500 mL of soda water when packed under 2.5 atmCO, pressure at 298 K. (Ans: 0.084mol]
Answer» Answer: Calculate the quantity of Co, in 500 mL of soda water when packed under 2.5 atm. CO, pressure at 298 K. (ANS: 0.084mol]

49.

2.7. Henry's law constant for Co, in water is 1.67x108 Pa at 298 K. Calculatethe quantity of Co, in 500 mL of soda water when packed under 2.5 atmCO, pressure at 298 K. (Ans: 0.084mol]

Answer»

Answer:

Calculate the quantity of Co, in 500 mL of soda water when packed under 2.5 atm. CO, pressure at 298 K. (ANS: 0.084mol]

Discussion

50.	Plz answer this question fast........
Answer» ANSWER: PLEASE follow me plz please plz and mark me as BRAIN list please plz please plz please plz please plz please plz please plz please

50.

Plz answer this question fast........

Answer»

ANSWER:

PLEASE follow me plz please plz and mark me as BRAIN list please plz please plz please plz please plz please plz please plz please

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Electronic configuration of first 20 elements

Mark as Brainliest Answer

Define functional group and why it is called functional group? ​

Plz helpand also explain it a bitit's really Confussing for me thanks in advance...​

Li-Na is incorrect because

Li - lithium

it is an INERT or nobal gases

it is an inert or nobal gasesit doesn't carry any valency ( valency - 0)

Na - Sodium

it is a metal ,

it is a metal ,it CARRIES valency ( valency - 1 )

extra information-

. In a hydrogen atom, the electrons fall from fifth orbit to the second orbit. Calculate the frequency and wavelength of the radiation emitted in this radiation. (Value of R = 109714 cm-1).​

Are(2.) Why alkaneschemicaly inerte?A)They are stable in nature and not react with alkali metals ,oxidents and other element under ordinary condition

Volume of one equivalent of H

What will be the effect on volume if we add 50 ml of Jam-e-Shirin in 200 ml of water and stir it well?

x mL of 0.5 M HCl aq. solution is mixed with y mL of 0.25 M HCl aq. solution. If 1 L of resultant solution is formed having 0.4 M w.r.t. HCl, then x and y are respectively

Is melting acup a physical change

Differentiate between Synthesis & Substitution reaction

The main difference between addition and SUBSTITUTION reactions is that addition reactions involve the COMBINATION of two or more atoms or FUNCTIONAL GROUPS whereas substitution reactions involve the displacement of an atom or a functional group by ANOTHER functional group.

Hope it helps you ✨

Write in brief an activity to show the particular nature of matter ​

DISSOLVE SALT in water, the particles of salt get into the spaces between particles of water. This shows the particulate nature of MATTER. (i) They have space between them. (II) They are continuously moving.

The acylic Compound is​

Tincture of iodine is made by dissolving *

2.The ionic radius of a cation is alwaysa) less than atomic radiusc) equal to atomic radiusb) more than atomic radiusd) cannot be predicted​

7.45 grams of KCL s dissolved in 100 grams of water.whaat will be the molality of the solution​

Find the number of atoms per unit cell inthe following Crystal structures) simple cubic ② Body centred cubic3) face centred cubic​

Name- ability of a substance to be drown or pulled through a small opening to make a wire

Ductility

100 ppm solution is prepared by doing mgso4 in h2o mass of solution approximately is

please MARK as brainlist....

Which is a better fuel between cow dung and LPG?WHY?

Write the IUPAC name of the following compounds.CH3- CH- CH- CH- CH-CH3| | | |CH3 OH C2H5 OH

or

A solution of a substance containing 1.05g per 100mL was found to be isotonic with 3% glucose solution the molecular mass of substance is

The concentration (w/w)% of a 200g solution of common salt is 10%. if 20g more water is mixed in it then it's concentration becomes(I) 10.10%(2) 11.11%(3) 9.99%(4) 9.09%​

Liquid benzene (C6H6) burns in oxygen according to the equation : 2C6 H6 (l) + 15O2 ( g ) ---> 12CO 2 ( g ) + 6H 2 O( g ).How many litres of O2 at STP are needed to complete the combustion of 39 g of liquid benzene?(Mol. wt. of O2 = 32, C6H6 = 78​

Bonding alters the properties of elements. Explain this statement by giving examples.​

What is the bond angle and structure of becl2? ​

An Organic Compound chas C=40% and water=40%then empherical formula will beCH2OC2H2OC3H2OC4H2O​

Pls answer quickly just keep question number then answer a,b,cd

In a reaction between 10mL water and half a spatula of copper sulfate, the temperature increases by 3 degrees. If 10ml water and a FULL spatula of copper sulfate reacted, would the temperature change be different or the same and why?

हमारे राष्ट्र ध्वज 'तिरंगा' के तीन रंग किसके पृतीक है​

Vayu mein avastha mein oxygen aane nitrogen ratio.

For rigid non elastic rotator

It's a INCOMPLETE QUESTION....

Assertion- pH of rain water is 6, it is called acid rain. Reason- pH is less than 7 ———> acidic solution.

Identify the substance getting oxidised , getting reduced, oxidixing and reducing agent

Oxygen don't show +4 and +6 oxidation state due to . (a) Inert pair effect (b) small size (c) gaseous nature (d) absence of vacant d- orbital .

11) પરિવર્તન ત્રણ તબક્કામાં આપો:ક્લોરોબેન્ઝિનમાંથી બેન્કોનાઈટ્રાઈલ​

Why molecularity cannot be obtained from rate equation of simple reaction​

why bottom portion of window glass in old building found to thicker than top portion? answer must be based on amorphous solid

Pls ans pls ans pls ans pls ans pls ans​

What is the symbol of iron????

6) Whichshouldof the following a queensaqueens Solutionshave the highest it boiling point ?​

Write three differences between physical change and chemical change​

Half life period of a substance is 20 day after 30 days what percentage of the substance will be left

What is runshuity?why do we use always ratter than pure metals to electric circuits

Why do we need to clarify elements

2 HCL + caco3 gives cacl2 + H2O + CO2 which is getting oxidized and which is getting reduced.​

Explain Vander Waal Radius​

Deffenation of unit factors​

2.7. Henry's law constant for Co, in water is 1.67x108 Pa at 298 K. Calculatethe quantity of Co, in 500 mL of soda water when packed under 2.5 atmCO, pressure at 298 K. (Ans: 0.084mol]​

Plz answer this question fast........ ​

Define functional group and why it is called functional group?

Plz helpand also explain it a bitit's really Confussing for me thanks in advance...

extra *information***-

. In a hydrogen atom, the electrons fall from fifth orbit to the second orbit. Calculate the frequency and wavelength of the radiation emitted in this radiation. (Value of R = 109714 cm-1).

Write in brief an activity to show the particular nature of matter

The acylic Compound is

2.The ionic radius of a cation is alwaysa) less than atomic radiusc) equal to atomic radiusb) more than atomic radiusd) cannot be predicted

7.45 grams of KCL s dissolved in 100 grams of water.whaat will be the molality of the solution

Find the number of atoms per unit cell inthe following Crystal structures) simple cubic ② Body centred cubic3) face centred cubic

The concentration (w/w)% of a 200g solution of common salt is 10%. if 20g more water is mixed in it then it's concentration becomes(I) 10.10%(2) 11.11%(3) 9.99%(4) 9.09%

Liquid benzene (C6H6) burns in oxygen according to the equation : 2C6 H6 (l) + 15O2 ( g ) ---> 12CO 2 ( g ) + 6H 2 O( g ).How many litres of O2 at STP are needed to complete the combustion of 39 g of liquid benzene?(Mol. wt. of O2 = 32, C6H6 = 78

Bonding alters the properties of elements. Explain this statement by giving examples.

What is the bond angle and structure of becl2?

An Organic Compound chas C=40% and water=40%then empherical formula will beCH2OC2H2OC3H2OC4H2O

हमारे राष्ट्र ध्वज 'तिरंगा' के तीन रंग किसके पृतीक है

11) પરિવર્તન ત્રણ તબક્કામાં આપો:ક્લોરોબેન્ઝિનમાંથી બેન્કોનાઈટ્રાઈલ

Why molecularity cannot be obtained from rate equation of simple reaction

Pls ans pls ans pls ans pls ans pls ans

6) Whichshouldof the following a queensaqueens Solutionshave the highest it boiling point ?

Write three differences between physical change and chemical change

2 HCL + caco3 gives cacl2 + H2O + CO2 which is getting oxidized and which is getting reduced.

Explain Vander Waal Radius

Deffenation of unit factors

2.7. Henry's law constant for Co, in water is 1.67x108 Pa at 298 K. Calculatethe quantity of Co, in 500 mL of soda water when packed under 2.5 atmCO, pressure at 298 K. (Ans: 0.084mol]

Plz answer this question fast........