52639 + Interview Questions in Secondary School in Chemistry

1.	Yadi kisi drava ki satah par dav lgaya jaye aur area bada diya jaye to dab m kya parivartan hoga
Answer» EXPLANATION: x xbgxzbzghs TUTION jsisijdudjjdjdjdaur area bada diya jaye to DAB m KYA parivartan HOGA

1.

Yadi kisi drava ki satah par dav lgaya jaye aur area bada diya jaye to dab m kya parivartan hoga

Answer»

EXPLANATION:

x xbgxzbzghs TUTION jsisijdudjjdjdjdaur area bada diya jaye to DAB m KYA parivartan HOGA

Discussion

2.	Name the following The petroleum product used as a solvent for dry-cleaningspammers stay away
Answer» Answer: "In dry cleaning, a petroleum solvent is used instead of water. It is "dry" only in the sense that it is not wet with water. In the early days of dry cleaning, this solvent was often kerosene or gasoline. Today the INDUSTRY uses a solvent called perchloroethylene ALMOST universally." pls follow like answers user sad GIVE likes take that many likes plsssssssssss give 100 likes request

2.

Name the following The petroleum product used as a solvent for dry-cleaningspammers stay away

Answer»

Answer:

"In dry cleaning, a petroleum solvent is used instead of water. It is "dry" only in the sense that it is not wet with water. In the early days of dry cleaning, this solvent was often kerosene or gasoline. Today the INDUSTRY uses a solvent called perchloroethylene ALMOST universally."

pls follow

like answers

user sad

GIVE likes take that many likes

plsssssssssss give 100 likes request

Discussion

3.	correct the statement : After getting a large amount of electrons ,the potential of the earth increases enormously
Answer» ANSWER: After GETTING a large amount of electrons, the potential of the EARTH DECREASES enormously.

3.

correct the statement : After getting a large amount of electrons ,the potential of the earth increases enormously

Answer»

ANSWER:

After GETTING a large amount of electrons, the potential of the EARTH DECREASES enormously.

Discussion

4.	What is the definition of pure substance
Answer» Answer: A chemical SUBSTANCE is a form of MATTER having constant chemical COMPOSITION and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical BONDS

4.

What is the definition of pure substance

Answer»

Answer:

A chemical SUBSTANCE is a form of MATTER having constant chemical COMPOSITION and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical BONDS

Discussion

5.	☆:what are the conditions use to determine that chemical reactions take place?
Answer» We can tell if a CHEMICAL REACTION has taken place when one or more of the following things happen: There has been a colour change inside the reaction flask. A gas has formed. Usually we KNOW a gas has formed when we can see bubbles.... This is UR ans... Hope it's helpful to u...

5.

☆:what are the conditions use to determine that chemical reactions take place?

Answer»

We can tell if a CHEMICAL REACTION has taken place when one or more of the following things happen: There has been a colour change inside the reaction flask. A gas has formed. Usually we KNOW a gas has formed when we can see bubbles....

This is UR ans...

Hope it's helpful to u...

Discussion

6.	Calculate the kinetic energy in s.i units of 4gm of ch4 at -73celsius
Answer» N= 16 4 =0.25mol E= 2 3 ×nRT = 2 3 × 4 1 ×8.314×200 =75×8.314 =623.55J

6.

Calculate the kinetic energy in s.i units of 4gm of ch4 at -73celsius

Answer»

N=

16

4

=0.25mol

E=

2

3

×nRT

=

2

3

×

4

1

×8.314×200

=75×8.314

=623.55J

Discussion

7.	Atom and molecule concept map
Answer» EXPLANATION: in chemistry have a nice day make as brainllist

7.

Atom and molecule concept map

Answer»

EXPLANATION:

in chemistry

have a nice day

make as brainllist

Discussion

8.	12 g of alkaline earth metal gives 14.8 g(3M + N, M2N2) of its nitride. Atomic weight ofmetal is -
Answer» ANSWER: GOOD NIGHT FRIENDS have a GREAT

8.

12 g of alkaline earth metal gives 14.8 g(3M + N, M2N2) of its nitride. Atomic weight ofmetal is -

Answer»

ANSWER:

GOOD NIGHT FRIENDS have a GREAT

Discussion

9.	Dil. KOH solution colour on pH paper
Answer» ANSWER: blue. Explanation: HOPE this HELPS you. Mark the answer as BRAINLIEST answer.

9.

Dil. KOH solution colour on pH paper

Answer»

ANSWER:

blue.

Explanation:

HOPE this HELPS you.

Mark the answer as BRAINLIEST answer.

Discussion

10.	What do you mean by effervescent ?
Answer» $\huge\underbrace\mathfrak{ANSWER}$ Producing EFFERVESCENCE an EFFERVESCENT BEVERAGE effervescent SALTS an effervescent tablet.

10.

What do you mean by effervescent ?

Answer»

$\huge\underbrace\mathfrak{ANSWER}$

Producing EFFERVESCENCE an EFFERVESCENT BEVERAGE effervescent SALTS an effervescent tablet.

Discussion

11.	40. Income from Salary is explained in the section(A) 12 to 14(B) 15 to 17C) 18 to 22(D) 24 to 26
Answer» Explanation: 1. Write the NEXT three integers for the following sequences 15, 12, 9.-6, 303 1, 3, 7, 11, 15 19. 23 2. Add the following without using the number line a) (-535) + (-609) b) -1000 + 186 3. Find the sum of the following: a)-638, 943, and -111 d)-87, -199 and -1347 4. Evaluate : a) (-36) + 11 + (-73) b)84 + (-99) + (-135) c)(-83) + (-183) + (1833) 5. What should be ADDED to -1984 to get the integer - 1? 6. Find the additive inverse of each of the following: a)-138 b)1 7. Write the successor and predecessor of each of the following: a)1001 b)-189 8. Find an integer p such that: a) p + 11 = 0 b) p + (-3) = 0 9.Subtract the following: a)-16 from 10 b)-11 from -119 10. Subtract the sum of -1150 and - 198 from 6234. 18. The sum of two integers is 1308. If one of the integers is -198, find the other. 11. What should be subtracted from - 2000 to get 1901?

11.

40. Income from Salary is explained in the section(A) 12 to 14(B) 15 to 17C) 18 to 22(D) 24 to 26

Answer»

Explanation:

1.

Write the NEXT three integers for the following sequences

15, 12, 9.-6, 303

1, 3, 7, 11, 15 19. 23

2. Add the following without using the number line

a) (-535) + (-609)

b) -1000 + 186

3. Find the sum of the following:

a)-638, 943, and -111

d)-87, -199 and -1347

4. Evaluate :

a) (-36) + 11 + (-73)

b)84 + (-99) + (-135)

c)(-83) + (-183) + (1833)

5. What should be ADDED to -1984 to get the integer - 1?

6. Find the additive inverse of each of the following:

a)-138

b)1

7. Write the successor and predecessor of each of the following:

a)1001

b)-189

8. Find an integer p such that:

a) p + 11 = 0

b) p + (-3) = 0

9.Subtract the following:

a)-16 from 10

b)-11 from -119

10. Subtract the sum of -1150 and - 198 from 6234.

18. The sum of two integers is 1308. If one of the integers is -198, find the other.

11. What should be subtracted from - 2000 to get 1901?

Discussion

12.	What is chloro - alkali process ?Ans- The process of electrolysis the sodium chloride solution is called chloro alkali
Answer» ANSWER: KHUD HI answer LIKH DIYA maaijaavein

12.

What is chloro - alkali process ?Ans- The process of electrolysis the sodium chloride solution is called chloro alkali

Answer»

ANSWER:

KHUD HI answer LIKH DIYA maaijaavein

Discussion

13.	What type of covalent bond is formed in nitrogen molecule
Answer» Answer: Nitrogen atoms will form three covalent BONDS (also called triple covalent) between TWO atoms of nitrogen because each nitrogen atom needs three ELECTRONS to fill its outermost shell. Another example of a nonpolar covalent bond is found in the METHANE (CH4) molecule. Explanation:

13.

What type of covalent bond is formed in nitrogen molecule

Answer»

Answer:

Nitrogen atoms will form three covalent BONDS (also called triple covalent) between TWO atoms of nitrogen because each nitrogen atom needs three ELECTRONS to fill its outermost shell. Another example of a nonpolar covalent bond is found in the METHANE (CH4) molecule.

Explanation:

Discussion

14.	An alloy of Aluminum and copper was treated with aqueous HCL . the Aluminum dissolved according to reactionAl + 3H⁺ → Al³⁺ +H₂But the copper remained as pure metal a 3 mole sample of alloy gave 67.2 liter of H₂ Measured at STP . what is the mole of Cu in the alloy ?
Answer» $\underline{\underline{\maltese\:\:\textbf{\textsf{Question}}}}$ An ALLOY of Aluminum and copper was treated with aqueous HCL . The Aluminum dissolved according to reaction $\sf{Al + 3H^+ \rightarrow Al^{3+} +H_2}$ . But the copper remained as pure metal , a 3 mole sample of alloy gave 67.2 liter of H₂ Measured at STP. What is the mole of Cu in the alloy ? $\underline{\underline{\maltese\:\:\textbf{\textsf{Given}}}}$ An alloy of Aluminum and copper was treated with aqueous HCL The Aluminum dissolved according to reaction $\sf{Al + 3H^+ \rightarrow Al^{3+} +H_2}$ Copper remained as pure metal A 3 mole sample of alloy gave 67.2 liter of H₂ Measured at STP Mole of Cu in the alloy $\rightarrow\textsf{To Find}$ $\underline{\underline{\maltese\:\:\textbf{\textsf{Solution}}}}$ The GENERAL equation is as follows : $\sf{A <klux>L</klux>+3 H C l \rightarrow A l C l_{3}+3/2\: H_{2}}$ It can be expressed as : $\sf{A l+3 H^{+} \rightarrow A l^{+3}+3/2\: H_{2}}$ We know : At STP, one mole of any gas occupies a volume of 22.4 L It means moles of 67.2 L of gas = $\sf{67.2 \:L/ 22.4 \:L}$ = 3 mole of H₂ From given reaction, it is clear that : $\sf{\textsf{ 1.5 } \textsf{mole of } H_{2} }=1 \textsf{ mole of } A l}$ $\longrightarrow\sf{3 \textsf { mole of } H_{2} =\dfrac{1 \textsf { mole of } A l}{1.5 \textsf { mole of } H_{2}} \times 3 \textsf { mole of } H_{2}}$ Hence, Mole of Al in alloy = 2 mole Mole of Cu in alloy = 3 mole - 2 mole = 1 mole It means there is 1 mole of Cu in alloy

14.

An alloy of Aluminum and copper was treated with aqueous HCL . the Aluminum dissolved according to reactionAl + 3H⁺ → Al³⁺ +H₂But the copper remained as pure metal a 3 mole sample of alloy gave 67.2 liter of H₂ Measured at STP . what is the mole of Cu in the alloy ?

Answer»

$\underline{\underline{\maltese\:\:\textbf{\textsf{Question}}}}$

An ALLOY of Aluminum and copper was treated with aqueous HCL . The Aluminum dissolved according to reaction $\sf{Al + 3H^+ \rightarrow Al^{3+} +H_2}$ . But the copper remained as pure metal , a 3 mole sample of alloy gave 67.2 liter of H₂ Measured at STP. What is the mole of Cu in the alloy ?

$\underline{\underline{\maltese\:\:\textbf{\textsf{Given}}}}$

An alloy of Aluminum and copper was treated with aqueous HCL
The Aluminum dissolved according to reaction $\sf{Al + 3H^+ \rightarrow Al^{3+} +H_2}$
Copper remained as pure metal
A 3 mole sample of alloy gave 67.2 liter of H₂ Measured at STP
Mole of Cu in the alloy $\rightarrow\textsf{To Find}$

$\underline{\underline{\maltese\:\:\textbf{\textsf{Solution}}}}$

The GENERAL equation is as follows : $\sf{A <klux>L</klux>+3 H C l \rightarrow A l C l_{3}+3/2\: H_{2}}$

It can be expressed as : $\sf{A l+3 H^{+} \rightarrow A l^{+3}+3/2\: H_{2}}$

We know : At STP, one mole of any gas occupies a volume of 22.4 L

It means moles of 67.2 L of gas = $\sf{67.2 \:L/ 22.4 \:L}$ = 3 mole of H₂

From given reaction, it is clear that : $\sf{\textsf{ 1.5 } \textsf{mole of } H_{2} }=1 \textsf{ mole of } A l}$

$\longrightarrow\sf{3 \textsf { mole of } H_{2} =\dfrac{1 \textsf { mole of } A l}{1.5 \textsf { mole of } H_{2}} \times 3 \textsf { mole of } H_{2}}$

Hence, Mole of Al in alloy = 2 mole

Mole of Cu in alloy = 3 mole - 2 mole = 1 mole

It means there is 1 mole of Cu in alloy

Discussion

15.	The full form of PVC . one word answer
Answer» POLYVINYL chloride Hope it HELPS you.. THANK you..

15.

The full form of PVC . one word answer

Answer»

POLYVINYL chloride

Hope it HELPS you..

THANK you..

Discussion

16.	What are the two different ions present in the compound CaS?
Answer» ANSWER: calcium ion and SULPHIDE ion Explanation: here calcium loses TWO electron to complete it's octet and gain POSTIVE charge as equilibrium of PROTON and electrons is changed And on the other hand sulphur gains two electrons for attaining nearest noble gas configuration or it's octet and gains negative charge as equilibrium between proton and electron

16.

What are the two different ions present in the compound CaS?

Answer»

ANSWER:

calcium ion and SULPHIDE ion

Explanation:

here calcium loses TWO electron to complete it's octet and gain POSTIVE charge as equilibrium of PROTON and electrons is changed And on the other hand sulphur gains two electrons for attaining nearest noble gas configuration or it's octet and gains negative charge as equilibrium between proton and electron

Discussion

17.	Why do ionic compounds form ions and covalent compounds do not?
Answer» Answer: ions COMPOUND is that the only covalent has been LIKE Carbon PENIS MIA Khalifa

17.

Why do ionic compounds form ions and covalent compounds do not?

Answer»

Answer:

ions COMPOUND is that the only covalent has been LIKE Carbon PENIS MIA Khalifa

Discussion

18.	B) Write about the position of hydrogen in the periodic table and how you will justify it.
Answer» Answer: Its electronic configuration is [1s1]. Due to the presence of only ONE electron in its 1s shell, hydrogen exhibits a dual behaviour, i.e., it RESEMBLES both ALKALI metals and halogens. Explanation: HOPE it helps you

18.

B) Write about the position of hydrogen in the periodic table and how you will justify it.

Answer»

Answer:

Its electronic configuration is [1s1]. Due to the presence of only ONE electron in its 1s shell, hydrogen exhibits a dual behaviour, i.e., it RESEMBLES both ALKALI metals and halogens.

Explanation:

HOPE it helps you

Discussion

19.	Hess's law is used in the determination of heat of reaction and heat of trans
Answer» HESS' LAW can be used to determine the overall energy required for a chemical REACTION, when it can be divided into synthetic STEPS that are individually easier to characterize. $\\ \\$

19.

Hess's law is used in the determination of heat of reaction and heat of trans

Answer»

HESS' LAW can be used to determine the overall energy required for a chemical REACTION, when it can be divided into synthetic STEPS that are individually easier to characterize.

$\\ \\$

Discussion

20.	How is CIF3 prepared ?
Answer» Answer: Solution : Preparation of ClF3 : Chlorine reacts with EXCESS of fluorine to form ClF3. REACTION with H2O : ClF3 reacts with water explosively and oxidises water to give oxygen or in controlled quantities oxygen diflouride (OF2) as WELL as HF and HCL.

20.

How is CIF3 prepared ?

Answer»

Answer:

Solution : Preparation of ClF3 : Chlorine reacts with EXCESS of fluorine to form ClF3. REACTION with H2O : ClF3 reacts with water explosively and oxidises water to give oxygen or in controlled quantities oxygen diflouride (OF2) as WELL as HF and HCL.

Discussion

21.	Is there any use of plastic in health care industry?
Answer» Plastics have been USED widely to create MEDICAL tools and DEVICES like surgical gloves, syringes, insulin PENS, IV tubes, catheters, inflatable splits, ETC. Such products are created for one-time use and help prevent the spread of dangerous diseases by eliminating the need to sterilize and re-use a device.

Discussion

22.	Lanthanides are group of elements in which the differentiating electron enters into
Answer» Answer: In Lanthanids, the last or differentiating ELECTRON ENTERS into 4f orbital of the anti-penultimate SHELL. The general electronic configuration of Lanthanides is [Xe] 4f 1–14 5D 1 6s 2 .

22.

Lanthanides are group of elements in which the differentiating electron enters into

Answer»

Answer:

In Lanthanids, the last or differentiating ELECTRON ENTERS into 4f orbital of the anti-penultimate SHELL. The general electronic configuration of Lanthanides is [Xe] 4f

1–14

5D

1

6s

2

.

Discussion

23.	what is meant by the coordination number in solids?what is the coordination number in a face centered cubic close packing structure?
Answer» EXPLANATION: Co-ordination NUMBER is the number of spheres (atoms, molecules or ions) directly surrounding a SINGLE sphere in a crystal. The coordination number in a face centered cubic close PACKING STRUCTURE is 12

23.

what is meant by the coordination number in solids?what is the coordination number in a face centered cubic close packing structure?

Answer»

EXPLANATION:

Co-ordination NUMBER is the number of spheres (atoms, molecules or ions) directly surrounding a SINGLE sphere in a crystal. The coordination number in a face centered cubic close PACKING STRUCTURE is 12

Discussion

24.	Which of the following oxidation states are the most stable for thallium and lead respectively ?1)+3,+4 2)+3, +2 3) +1, +2 4) +1+4
Answer» Explanation: 1 ONE MINUTE WAIT PLEASE

24.

Which of the following oxidation states are the most stable for thallium and lead respectively ?1)+3,+4 2)+3, +2 3) +1, +2 4) +1+4

Answer»

Explanation:

1 ONE MINUTE WAIT PLEASE

Discussion

25.	Why the copper do not react with diluteH2 s o4
Answer» ANSWER: Because COPPER is LOWER in REACTIVITY than HYDROGEN

25.

Why the copper do not react with diluteH2 s o4

Answer»

ANSWER:

Because COPPER is LOWER in REACTIVITY than HYDROGEN

Discussion

26.	What is primary alcohol
Answer» Explanation: a primary ALCOHOL is an alcohol in which the hydroxy GROUP is bonded to a primary carbon ATOM it can also be defined as a molecule containing a CH2OH group in contrast secondary alcohol is a FORMULA CHROH and a tertiary alcohol has formula CR2OH where R INDICATES a carbon containing group

26.

What is primary alcohol

Answer»

Explanation:

a primary ALCOHOL is an alcohol in which the hydroxy GROUP is bonded to a primary carbon ATOM it can also be defined as a molecule containing a CH2OH group in contrast secondary alcohol is a FORMULA CHROH and a tertiary alcohol has formula CR2OH where R INDICATES a carbon containing group

Discussion

27.	Write two differences between dry cell and dry batteries
Answer» Answer: The battery CONTAINS a liquid ELECTROLYTE such as sulfuric acid, a dangerous corrosive liquid. A dry-cell battery does not contain liquid. Smaller dry-cell batteries, such as alkaline or lithium ion, are typically used in PORTABLE electronics, such as toys, PHONES and laptops. Explanation: please MARK me as brainliest

27.

Write two differences between dry cell and dry batteries

Answer»

Answer:

The battery CONTAINS a liquid ELECTROLYTE such as sulfuric acid, a dangerous corrosive liquid. A dry-cell battery does not contain liquid. Smaller dry-cell batteries, such as alkaline or lithium ion, are typically used in PORTABLE electronics, such as toys, PHONES and laptops.

Explanation:

please MARK me as brainliest

Discussion

28.	Explain the following terms in brief 1) stability 2) bandwidth 3) noise
Answer» Explanation: Stability :- the quality, state, or DEGREE of being stable: such as. the strength to STAND or endure firmness. b : the property of a body that causes it when disturbed from a condition of EQUILIBRIUM or steady motion to develop forces or moments that restore the original condition. bandwidth :- band of frequencies used for sending electronic signals noise :- a sound, ESPECIALLY one that is loud or unpleasant

28.

Explain the following terms in brief 1) stability 2) bandwidth 3) noise

Answer»

Explanation:

Stability :-

the quality, state, or DEGREE of being stable: such as. the strength to STAND or endure firmness. b : the property of a body that causes it when disturbed from a condition of EQUILIBRIUM or steady motion to develop forces or moments that restore the original condition.

bandwidth :-

band of frequencies used for sending electronic signals

noise :-

a sound, ESPECIALLY one that is loud or unpleasant

Discussion

29.	Is HYDROGEN A GOOD OXIDISING AND A REDUCING AGENT
Answer» Answer: HYDROGEN GAS is a REDUCING AGENT when it reacts with non-metals and an oxidizing agent when it reacts with metals. Explanation:

29.

Is HYDROGEN A GOOD OXIDISING AND A REDUCING AGENT

Answer»

Answer:

HYDROGEN GAS is a REDUCING AGENT when it reacts with non-metals and an oxidizing agent when it reacts with metals.

Explanation:

Discussion

30.	IcExplain why ais there a phenomenal decrease is ionizationen thally from carbom to silicon.
Answer» Answer: The atomic radius and screening effect of the intervening ELECTRONS in silicon atom are higher in comparison to carbon. Thus, the force of ATTRACTION of nucleus for the valence electrons in silicon CONSIDERABLY decreases. As a result, there is PHENOMENAL DECREASE in ionisation energy from carbon to silicon. hope this answer is helpful for you.

30.

IcExplain why ais there a phenomenal decrease is ionizationen thally from carbom to silicon.

Answer»

Answer:

The atomic radius and screening effect of the intervening ELECTRONS in silicon atom are higher in comparison to carbon. Thus, the force of ATTRACTION of nucleus for the valence electrons in silicon CONSIDERABLY decreases. As a result, there is PHENOMENAL DECREASE in ionisation energy from carbon to silicon.

hope this answer is helpful for you.

Discussion

31.	Prepare 1,4 dinitrobenzene from benzenamine
Answer» ANSWER: The following steps are involved in this conversion : Step 1 : Nitration of aniline. When the benzenamine or aniline REACT with the nitrous acid and SULFURIC acid, the result is the formation of para-nitroaniline. Step 2 : Formation of diazonium salt. ... Step 3 : Formation of 1,4-dinitrobenzene.

31.

Prepare 1,4 dinitrobenzene from benzenamine

Answer»

ANSWER:

The following steps are involved in this conversion :

Step 1 : Nitration of aniline. When the benzenamine or aniline REACT with the nitrous acid and SULFURIC acid, the result is the formation of para-nitroaniline.

Step 2 : Formation of diazonium salt. ...

Step 3 : Formation of 1,4-dinitrobenzene.

Discussion

32.	Which Of The Following Metals Does No Give Hydrogen With Acids?1) Iron2) Copper3) Magnesium 4) ZincPls No Spams..
Answer» ANSWER: COPPER is the RIGHT answer

32.

Which Of The Following Metals Does No Give Hydrogen With Acids?1) Iron2) Copper3) Magnesium 4) ZincPls No Spams..

Answer»

ANSWER:

COPPER is the RIGHT answer

Discussion

33.	Divalent electronegative ion
Answer» Answer: CALCIUM is a very DUCTILE SILVERY metal (sometimes described as pale yellow) whose properties are very similar to the HEAVIER elements in its group, strontium, barium, and radium. ... Hence, calcium is ALMOST always divalent Explanation: *here* is *your* *answers*

33.

Divalent electronegative ion

Answer»

Answer:

CALCIUM is a very DUCTILE SILVERY metal (sometimes described as pale yellow) whose properties are very similar to the HEAVIER elements in its group, strontium, barium, and radium. ... Hence, calcium is ALMOST always divalent

Explanation:

here is your answers

Discussion

34.	How many moles are in 12.04 x 1023 particles of O2 ?
Answer» Answer: ONE mole of oxygen gas, which has the formula O2, has a MASS of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each MOLECULE of oxygen contains two oxygen atoms. Explanation:

34.

How many moles are in 12.04 x 1023 particles of O2 ?

Answer»

Answer:

ONE mole of oxygen gas, which has the formula O2, has a MASS of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each MOLECULE of oxygen contains two oxygen atoms.

Explanation:

Discussion

35.	For which of the following pair indicates the two species of large size of fe2 or fe3abd -mg2 orca2
Answer» ANSWER: DE hejwksjxbvxxgysuwowjx

35.

For which of the following pair indicates the two species of large size of fe2 or fe3abd -mg2 orca2

Answer»

ANSWER:

DE hejwksjxbvxxgysuwowjx

Discussion

36.	Pleas3 answer that how what is the made of 8 moles of NaCl?
Answer» ANSWER: Answer Number of MOLES = 1000 MV = 1000 0.5×250 =0.125 Mass of NACL =58.5×0.125=7.32g

36.

Pleas3 answer that how what is the made of 8 moles of NaCl?

Answer»

ANSWER:

Answer

Number of MOLES =

1000

MV

=

1000

0.5×250

=0.125

Mass of NACL =58.5×0.125=7.32g

Discussion

37.	when milk of magnesia reacts with acetic acid it produces (a) acidic salt (b) basic salt (c) complex salt (d) neutral salt
Answer» ANSWER: d) nuetral SALT is the CORRECT answer

37.

when milk of magnesia reacts with acetic acid it produces (a) acidic salt (b) basic salt (c) complex salt (d) neutral salt

Answer»

ANSWER:

d) nuetral SALT is the CORRECT answer

Discussion

38.	Explain the following terms a) input impedance b) gain
Answer» ANSWER: #The INPUT RESISTANCE is the resistance seen by the current source or VOLTAGE source which drives the circuit. #Current Amplification Factor (γ) Theratio of change in emitter current (ΔIE) to the change in BASE current (ΔIB) is known as Current Amplification factorin common collector (CC)configuration. It is denoted by γ. The current gain in CC configuration is same as in CE configuration. Explanation: please mark me Brailient

38.

Explain the following terms a) input impedance b) gain

Answer»

ANSWER:

#The INPUT RESISTANCE is the resistance seen by the current source or VOLTAGE source which drives the circuit.

#Current Amplification Factor (γ) Theratio of change in emitter current (ΔIE) to the change in BASE current (ΔIB) is known as Current Amplification factorin common collector (CC)configuration. It is denoted by γ. The current gain in CC configuration is same as in CE configuration.

Explanation:

please mark me Brailient

Discussion

39.	Any One Know What Is Chemistry's Paper For +1 Please Replay
Answer» Answer: EASY Things You Can Do to Save Endangered Species Learn about endangered species in your area. ... Visit a national WILDLIFE REFUGE, park or other open SPACE . ... MAKE your home wildlife friendly. ... Native plants provide food and shelter for native wildlife.

39.

Any One Know What Is Chemistry's Paper For +1 Please Replay

Answer»

Answer:

EASY Things You Can Do to Save Endangered Species

Learn about endangered species in your area. ...

Visit a national WILDLIFE REFUGE, park or other open SPACE . ...

MAKE your home wildlife friendly. ...

Native plants provide food and shelter for native wildlife.

Discussion

40.	Which Of The Following Is Doberuners traid?1)Ca,Sr,Ba2)C,N,O3)F,Cl,Br4)Na,Mg,AlPls No Spams...
Answer» Answer: 1). Ca sr. BA you can ALSO learn this as a (CAR SCOOTER BAr)

40.

Which Of The Following Is Doberuners traid?1)Ca,Sr,Ba2)C,N,O3)F,Cl,Br4)Na,Mg,AlPls No Spams...

Answer»

Answer:

1). Ca sr. BA

you can ALSO learn this as a (CAR SCOOTER BAr)

Discussion

41.	How would you prepare a 10% solution concentration from a solution of 20% concentration... showing the volume required.
Answer» have a GOOD dayujjhjhhgghnhhbngh

Discussion

42.	What is homogeneous and hetrogeneous
Answer» Answer: HOMOGENEOUS: A mixture in which the composition is uniform THROUGHOUT the mixture. mixture: CONSISTS of multiple SUBSTANCES PUT together. substance: It has a uniform and definite composition hetrogeneous :- consisting of dissimilar or diverse ingredients or constituents : mixed an ethnically heterogeneous population.

42.

What is homogeneous and hetrogeneous

Answer»

Answer:

HOMOGENEOUS: A mixture in which the composition is uniform THROUGHOUT the mixture. mixture: CONSISTS of multiple SUBSTANCES PUT together. substance: It has a uniform and definite composition

hetrogeneous :- consisting of dissimilar or diverse ingredients or constituents : mixed an ethnically heterogeneous population.

Discussion

43.	Calculate the pH of a buffer consisting of 0.50 M HF and 0.45 M F- (a) before and (b) after addition of 0.40 g NaOH to 1.0 L of the buffer. Ka of HF = 6.8 x 10-4
Answer» ANSWER: idontknowtheanswerbutmarkmeasbrainliest Explanation:

43.

Calculate the pH of a buffer consisting of 0.50 M HF and 0.45 M F- (a) before and (b) after addition of 0.40 g NaOH to 1.0 L of the buffer. Ka of HF = 6.8 x 10-4

Answer»

ANSWER:

idontknowtheanswerbutmarkmeasbrainliest

Explanation:

Discussion

44.	Arrange the following in the order of property indicated for each set:(i) H2O, NH3, HCl, H2 (increasing magnitude of intermolecular forces (ii) O2, He, CO2, CH4 (increasing value of van der Waal constant ‘a’)please give the correct answer otherwise your answer will be report❤❤❤
Answer» ANSWER: <H2>(i) H2, H2O, HCL, NH3 (ii) O2, CO2, He, CH4

44.

Arrange the following in the order of property indicated for each set:(i) H2O, NH3, HCl, H2 (increasing magnitude of intermolecular forces (ii) O2, He, CO2, CH4 (increasing value of van der Waal constant ‘a’)please give the correct answer otherwise your answer will be report❤❤❤

Answer»

ANSWER:

<H2>(i) H2, H2O, HCL, NH3

(ii) O2, CO2, He, CH4

Discussion

45.	Calculate the pH of an acid with hydrogen ion concentration of 0.001M for H2So4
Answer» EXPLANATION: HOPE it HELPS....

45.

Calculate the pH of an acid with hydrogen ion concentration of 0.001M for H2So4

Answer»

EXPLANATION:

HOPE it HELPS....

Discussion

46.	Please send the diagram of sewage system
Answer» EXPLANATION: fgjbvhujbvhijbgftuujjhii

46.

Please send the diagram of sewage system

Answer»

EXPLANATION:

fgjbvhujbvhijbgftuujjhii

Discussion

47.	For the same angle of insidance in media l,m and n the angle of reflection are 45,35 and 15* respectively in wich medium will the velocity of light be minimum?giv the reason for answer.
Answer» ANSWER: AAAAAAAAAAAAAAAAAAAAAAAAAAAA

47.

For the same angle of insidance in media l,m and n the angle of reflection are 45,35 and 15* respectively in wich medium will the velocity of light be minimum?giv the reason for answer.

Answer»

ANSWER:

AAAAAAAAAAAAAAAAAAAAAAAAAAAA

Discussion

48.	By an experiment show that one fifth part of air is oxygen
Answer» ANSWER: Take a lighted candle and place it carefully at the centre of the trough. Now take a glass tumbler and use a marker pen to MARK FIVE equal PORTIONS on the tumbler. INVERT this tumbler over the burning candle. Observation - The candle burns for some time and is then extinguished.

48.

By an experiment show that one fifth part of air is oxygen

Answer»

ANSWER:

Take a lighted candle and place it carefully at the centre of the trough. Now take a glass tumbler and use a marker pen to MARK FIVE equal PORTIONS on the tumbler. INVERT this tumbler over the burning candle. Observation - The candle burns for some time and is then extinguished.

Discussion

49.	2. Water finds application as a means of transporting goods.3. On boiling - water exists in the liquid state.
Answer» Answer: 1. HYDRAULIC jack SYSTEM. 2. no on boiling water begins to convert in GAS. Explanation: Hope it will help you

49.

2. Water finds application as a means of transporting goods.3. On boiling - water exists in the liquid state.

Answer»

Answer:

1. HYDRAULIC jack SYSTEM.

2. no on boiling water begins to convert in GAS.

Explanation:

Hope it will help you

Discussion

50.	one mol of hydrocarbon on complete combustion produce 4 mol of CO2 and 4 mol of water. The hydrocarbon is
Answer» Answer: 1 MOLE of hydrocarbon GIVES N mole of CO2 where n is no. of CARBON atoms in hydrocarbon. 1 mole of hydrocarbon = 4 mole of CO2 . So, value of n = 4. hope this answer is helpful for you.

50.

one mol of hydrocarbon on complete combustion produce 4 mol of CO2 and 4 mol of water. The hydrocarbon is

Answer»

Answer:

1 MOLE of hydrocarbon GIVES N mole of CO2 where n is no. of CARBON atoms in hydrocarbon. 1 mole of hydrocarbon = 4 mole of CO2 . So, value of n = 4.

hope this answer is helpful for you.

Discussion

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Calculate the pH of a buffer consisting of 0.50 M HF and 0.45 M F- (a) before and (b) after addition of 0.40 g NaOH to 1.0 L of the buffer. Ka of HF = 6.8 x 10-4

Arrange the following in the order of property indicated for each set:(i) H2O, NH3, HCl, H2 (increasing magnitude of intermolecular forces (ii) O2, He, CO2, CH4 (increasing value of van der Waal constant ‘a’)please give the correct answer otherwise your answer will be report❤❤❤​

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Calculate the pH of an acid with hydrogen ion concentration of 0.001M for H2So4

Please send the diagram of sewage system

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1. HYDRAULIC jack SYSTEM.

2. no on boiling water begins to convert in GAS.

Hope it will help you

one mol of hydrocarbon on complete combustion produce 4 mol of CO2 and 4 mol of water. The hydrocarbon is​

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Name the following The petroleum product used as a solvent for dry-cleaningspammers stay away

correct the statement : After getting a large amount of electrons ,the potential of the earth increases enormously

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12 g of alkaline earth metal gives 14.8 g(3M + N, M2N2) of its nitride. Atomic weight ofmetal is -

What do you mean by effervescent ?

40. Income from Salary is explained in the section(A) 12 to 14(B) 15 to 17C) 18 to 22(D) 24 to 26

What is chloro - alkali process ?Ans- The process of electrolysis the sodium chloride solution is called chloro alkali

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Lanthanides are group of elements in which the differentiating electron enters into

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IcExplain why ais there a phenomenal decrease is ionizationen thally from carbom to silicon.

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For the same angle of insidance in media l,m and n the angle of reflection are 45,35 and 15* respectively in wich medium will the velocity of light be minimum?giv the reason for answer.

By an experiment show that one fifth part of air is oxygen

2. Water finds application as a means of transporting goods.3. On boiling - water exists in the liquid state.

one mol of hydrocarbon on complete combustion produce 4 mol of CO2 and 4 mol of water. The hydrocarbon is