52639 + Interview Questions in Secondary School in Chemistry

1.	Hi people can any one please answer this questionby the way look at the points that you will get
Answer» ANSWER: you can GET the answer by GOOGLE or in QUORA just SEARCH and you will get it

1.

Hi people can any one please answer this questionby the way look at the points that you will get

Answer»

ANSWER:

you can GET the answer by GOOGLE or in QUORA just SEARCH and you will get it

Discussion

2.	A solution of a substance is used for white washing. name the substance with it's formula?
Answer» Answer: the chemical name of substance, which is USED for WHITE washing is calcium oxide. It's COMMON name is lime or QUICK lime Explanation: the chemical formula of calcium oxide is CaO . when calcium oxide reacts with water it forms calcium hydroxide

2.

A solution of a substance is used for white washing. name the substance with it's formula?

Answer»

Answer:

the chemical name of substance, which is USED for WHITE washing is calcium oxide. It's COMMON name is lime or QUICK lime

Explanation:

the chemical formula of calcium oxide is CaO . when calcium oxide reacts with water it forms calcium hydroxide

Discussion

3.	What is the frequency of light that has a wavelength of 300 micrometres
Answer» Answer: Explanation: frequency = VELOCITY of LIGHT / wavelenght of light => Fre. = 3 X 10^8 / 300MM = 3 x 10^8 /300 x 10^-3 m = 10^9 HZ

3.

What is the frequency of light that has a wavelength of 300 micrometres

Answer»

Answer:

Explanation:

frequency = VELOCITY of LIGHT / wavelenght of light

=> Fre. = 3 X 10^8 / 300MM

= 3 x 10^8 /300 x 10^-3 m

= 10^9 HZ

Discussion

4.	CHiCH2)4CH20H PCC 'A''A' is
Answer» ANSWER: you WRITE this from GOOGLE I am CONFUSE

4.

CHiCH2)4CH20H PCC 'A''A' is

Answer»

ANSWER:

you WRITE this from GOOGLE I am CONFUSE

Discussion

5.	Reaction of glucose with phenyl hydrazine gives
Answer» Explanation: *Glucose reacts with 3 moles of PHENYLHYDRAZINE to form GLUCOSAZONE, a CRYSTALLINE derivative of Glucose. It is stabilised by intramolecular HYDROGEN bonding.*

5.

Reaction of glucose with phenyl hydrazine gives

Answer»

Explanation:

Glucose reacts with 3 moles of PHENYLHYDRAZINE to form GLUCOSAZONE, a CRYSTALLINE derivative of Glucose. It is stabilised by intramolecular HYDROGEN bonding.

Discussion

6.	A compound has 20% carbon 46% nitrogen 6.7% hydrogen and rest is zero what empirical formula
Answer» Carbon=20/12=1.66 Nitrogen=46/14=3.28 Hydrogen=6.7/1=6 .7 Simple ratio Carbon=1.66/1.66=1 Nitrogen=3.28/1.66=2 Hydrogen=6.7/1.66=4 Empirical formula=C H4 N2 I HOPE this HELPS ( ╹▽╹ )

6.

A compound has 20% carbon 46% nitrogen 6.7% hydrogen and rest is zero what empirical formula

Answer»

Carbon=20/12=1.66

Nitrogen=46/14=3.28

Hydrogen=6.7/1=6 .7

Simple ratio

Carbon=1.66/1.66=1

Nitrogen=3.28/1.66=2

Hydrogen=6.7/1.66=4

Empirical formula=C H4 N2

I HOPE this HELPS ( ╹▽╹ )

Discussion

7.	Glass is made of the mixture of A. Quartz and micaB. Sand and saltC. Sand and silicatesD. None of these
Answer» HOPE IT HELPS : Glass is a mixture of SAND and silicates STAY HOME STAY SAFE x JOKER ALWAYS x

7.

Glass is made of the mixture of A. Quartz and micaB. Sand and saltC. Sand and silicatesD. None of these

Answer»

HOPE IT HELPS :

Glass is a mixture of SAND and silicates

STAY HOME STAY SAFE

x JOKER ALWAYS x

Discussion

8.	A complex of iron contains 5 % by mass of iron. calculate the number of atoms in 5g of this complexPls answer. Its my homework for chemistry tuition and I need to give it soon
Answer» ANSWER: $2.68 \times {10}^{21}$

8.

A complex of iron contains 5 % by mass of iron. calculate the number of atoms in 5g of this complexPls answer. Its my homework for chemistry tuition and I need to give it soon

Answer»

ANSWER:

$2.68 \times {10}^{21}$

Discussion

9.	Q2.Name the (i) substance oxidised (ii) substance reduced (iii)oxidising agent and (iv)reducingagent in the following reactions:(a)2PbO+C--→2Pb+CO2(b)PbS+4H2O2-----→PbSO4 +4H2O(c)Fe2O3+3CO------→2Fe +3CO2(d)2Na +Cl2-------→2NaCl
Answer» ANSWER: SORRY for that I don't KNOW this answer

9.

Q2.Name the (i) substance oxidised (ii) substance reduced (iii)oxidising agent and (iv)reducingagent in the following reactions:(a)2PbO+C--→2Pb+CO2(b)PbS+4H2O2-----→PbSO4 +4H2O(c)Fe2O3+3CO------→2Fe +3CO2(d)2Na +Cl2-------→2NaCl

Answer»

ANSWER:

SORRY for that I don't KNOW this answer

Discussion

10.	What type of reaction does occur when silver bromide is exposed to sunlight?
Answer» ANSWER: photolytic decomposition reaction Silver bromide is a PHOTOSENSITIVE compound that DECOMPOSES when exposes to sunlight. That is the REASON it is ALWAYS kept in the dark bottles. The reaction of silver chloride with sunlight is also called as photolytic decomposition reaction in which the decomposition reaction carried out by sunlight

10.

What type of reaction does occur when silver bromide is exposed to sunlight?

Answer»

ANSWER:

photolytic decomposition reaction

Silver bromide is a PHOTOSENSITIVE compound that DECOMPOSES when exposes to sunlight. That is the REASON it is ALWAYS kept in the dark bottles. The reaction of silver chloride with sunlight is also called as photolytic decomposition reaction in which the decomposition reaction carried out by sunlight

Discussion

11.	Calculate the no. of atoms of each type in 49 g of H2504.(CH=1u, s = 32 u 0-16u)
Answer» Weight=49g Molar MASS= 98 Moles = weight/molar mass Moles=0.5 Moles= N(H2SO4)/Na N(H2SO4)= 0.5×6.023×10^23 N(H2SO4)=3.0115×10^23 I HOPE this HELPS ( ╹▽╹ )

11.

Calculate the no. of atoms of each type in 49 g of H2504.(CH=1u, s = 32 u 0-16u)

Answer»

Weight=49g

Molar MASS= 98

Moles = weight/molar mass

Moles=0.5

Moles= N(H2SO4)/Na

N(H2SO4)= 0.5×6.023×10^23

N(H2SO4)=3.0115×10^23

I HOPE this HELPS ( ╹▽╹ )

Discussion

12.	Calculate the number of electrons in 3.2 Gram of methane
Answer» Answer: 12. 044 * 10²³ Explanation: The FOLLOWING PIC will HELP you

12.

Calculate the number of electrons in 3.2 Gram of methane

Answer»

Answer:

12. 044 * 10²³

Explanation:

The FOLLOWING PIC will HELP you

Discussion

13.	A student dropped a few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was passed through lime water. What change would beobserved in lime water ? Write balanced chemical equations for both the changes observed.(b) State the chemical property in each case on which the following uses of bakingsoda are based :1.as an antacid 2.as a constituent of baking powder.
Answer» $\rm{Answer:}$ (a) Marble used here is calcium carbonate - $\rm{CaCO_3}$ . When a few pieces of marble are dropped in HCl, $\rm{CO_2}$ GAS is evolved which when passed through lime water turns it milky due to the formation of insoluble calcium carbonate. Chemical EQUATIONS :- $\rm{CaCO_{3(s)}+HCl_{(aq)}\longrightarrow{}CaCl_{2(aq)}+H_2O_{(l)}+CO_{2(g)}}$ $\rm{Ca(OH)_{2(aq)}+CO_{2(g)}\longrightarrow{}CaCO_{3(s)}+H_2O_{(l)}}$ $\hrulefill$ (b) (i) Use of baking soda as an antacid : Baking soda is a mild non-corossive basic salt. Hence, it is basic in nature and neutralizes the excess acid formed in the stomach during INDIGESTION. $\hrulefill$ (ii) Baking powder contains baking soda and a mild edible acid. On heating, $\rm{NaHCO_3}$ decomposes to give $\rm{CO_2}$ gas and SODIUM carbonate. The bitter taste of $\rm{Na_2CO_3}$ is neutralized by tartaric or citric acid and $\rm{CO_2}$ gas produced causes bread and cake to rise.

13.

A student dropped a few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was passed through lime water. What change would beobserved in lime water ? Write balanced chemical equations for both the changes observed.(b) State the chemical property in each case on which the following uses of bakingsoda are based :1.as an antacid 2.as a constituent of baking powder.

Answer»

$\rm{Answer:}$

(a) Marble used here is calcium carbonate - $\rm{CaCO_3}$ . When a few pieces of marble are dropped in HCl, $\rm{CO_2}$ GAS is evolved which when passed through lime water turns it milky due to the formation of insoluble calcium carbonate.

Chemical EQUATIONS :-

$\rm{CaCO_{3(s)}+HCl_{(aq)}\longrightarrow{}CaCl_{2(aq)}+H_2O_{(l)}+CO_{2(g)}}$

$\rm{Ca(OH)_{2(aq)}+CO_{2(g)}\longrightarrow{}CaCO_{3(s)}+H_2O_{(l)}}$

$\hrulefill$

(b) (i) Use of baking soda as an antacid : Baking soda is a mild non-corossive basic salt. Hence, it is basic in nature and neutralizes the excess acid formed in the stomach during INDIGESTION.

$\hrulefill$

(ii) Baking powder contains baking soda and a mild edible acid. On heating, $\rm{NaHCO_3}$ decomposes to give $\rm{CO_2}$ gas and SODIUM carbonate. The bitter taste of $\rm{Na_2CO_3}$ is neutralized by tartaric or citric acid and $\rm{CO_2}$ gas produced causes bread and cake to rise.

Discussion

14.	Ionisation energy and atomic size are inversely proportional. explain
Answer» If atomic SIZE is small then the forces of attraction between the nucleus and electrons will be HUGE and hence LARGER amount of energy would be required to remove an electron from the OUTERMOST ORBIT , therefore the ionization energy will be high. hence ionization energy and atomic size are inversely proportional Explanation: pls mark me as the brainliest

14.

Ionisation energy and atomic size are inversely proportional. explain

Answer»

If atomic SIZE is small then the forces of attraction between the nucleus and electrons will be HUGE and hence LARGER amount of energy would be required to remove an electron from the OUTERMOST ORBIT , therefore the ionization energy will be high.

hence ionization energy and atomic size are inversely proportional

Explanation:

pls mark me as the brainliest

Discussion

15.	Calculate the no. of atoms of phosphorus in 284g of P4.atomic mass of P→ 31 u
Answer» Answer: 220.5728×10^23 atoms ,or, 2.205728×10^25 atmos Explanation: 31u is atomic mass so gram atomic mass is 31g so gram atomic mass is equal to mass of 1mol of that ELEMENT so which is molar mass so malar mass of P4 is 31g/mol no of moles of p is 284/31=9.16 mole so in p4 the atomicity of element is 4 so there 4 atoms in 1 p4 molecule so in 9.16 mol of p4 molecule there is 9.16×4mol of atoms= 36.64 mol of atoms 1 mol = 6.02×10^23 so 36.64mol =36.64×6.02×10^23 = 220.5728×10^23 atoms or , 2.205728×10^25atoms

15.

Calculate the no. of atoms of phosphorus in 284g of P4.atomic mass of P→ 31 u

Answer»

Answer:

220.5728×10^23 atoms ,or,

2.205728×10^25 atmos

Explanation:

31u is atomic mass

so gram atomic mass is 31g

so gram atomic mass is equal to mass of 1mol of that ELEMENT

so which is molar mass

so malar mass of P4 is 31g/mol

no of moles of p is

284/31=9.16 mole

so in p4 the atomicity of element is 4

so there 4 atoms in 1 p4 molecule

so in 9.16 mol of p4 molecule

there is 9.16×4mol of atoms= 36.64 mol of atoms

1 mol = 6.02×10^23

so 36.64mol =36.64×6.02×10^23

= 220.5728×10^23 atoms

or , 2.205728×10^25atoms

Discussion

16.	&A metal forms a chloride with the formula MCl2, formula of phosphoric acid is H3PO4. Formula ofthe phosphate of the metal isa) M3PO4b) MPO4c) M3 (PO3)2 d) M2PO4
Answer» ANSWER: I GOT this : M3(PO4)2 Explanation:

16.

&A metal forms a chloride with the formula MCl2, formula of phosphoric acid is H3PO4. Formula ofthe phosphate of the metal isa) M3PO4b) MPO4c) M3 (PO3)2 d) M2PO4

Answer»

ANSWER:

I GOT this : M3(PO4)2

Explanation:

Discussion

17.	Write T for True and F for False statements. Rewrite the correct state1. The matter has mass but does not occupy space. 2. the space between the molecules in the composition of matter is called inte atomic space3. The matter is made up of tiny particles called atoms and molecules.4. The tiny particles in composition of a matter are tightly packed in solids, looselyosition of a matter are tightly packed in solids, loosely packed in liquids andhave random motion in gases.5. The intermolecular force of attraction between the particles keeps them together as solid, liquid,gases6. The gases are not compressible.7. The solids have no definite shape and volume.8. The particles of a liquid diffuse very easily.9. The force of attraction between molecules in gaseous state is very strong.10. The tiny particles in composition of matter in gaseous state are highly compressible and least rigid.
Answer» ANSWER: Explanation: 1 false 2 TRUE 3 true 4 5 true 6 false 7 false 8 false 9 true 10 true

17.

Write T for True and F for False statements. Rewrite the correct state1. The matter has mass but does not occupy space. 2. the space between the molecules in the composition of matter is called inte atomic space3. The matter is made up of tiny particles called atoms and molecules.4. The tiny particles in composition of a matter are tightly packed in solids, looselyosition of a matter are tightly packed in solids, loosely packed in liquids andhave random motion in gases.5. The intermolecular force of attraction between the particles keeps them together as solid, liquid,gases6. The gases are not compressible.7. The solids have no definite shape and volume.8. The particles of a liquid diffuse very easily.9. The force of attraction between molecules in gaseous state is very strong.10. The tiny particles in composition of matter in gaseous state are highly compressible and least rigid.

Answer»

ANSWER:

Explanation:

1 false

2 TRUE

3 true

4

5 true

6 false

7 false

8 false

9 true

10 true

Discussion

18.	What is the cretaria for optical isomerism
Answer» The FIRST CRITERIA is that the compound must have a chiral carbon Chiral carbon is a carbon having 4 Different groups attached to it No CENTER of symmetry No plane of symmetry I hope this helps ( ╹▽╹ )

18.

What is the cretaria for optical isomerism

Answer»

The FIRST CRITERIA is that the compound must have a chiral carbon

Chiral carbon is a carbon having 4 Different groups attached to it

No CENTER of symmetry

No plane of symmetry

I hope this helps ( ╹▽╹ )

Discussion

19.	Ch3ch(ch3)och3 in presenceof hi gives rise to?
Answer» Answer: 2-iodo PROPANE + METHANOL

19.

Ch3ch(ch3)och3 in presenceof hi gives rise to?

Answer»

Answer:

2-iodo PROPANE + METHANOL

Discussion

20.	What is more acedic sulphonic acid or benzenesulphonic acid
Answer» What is more acedic sulphonic ACID or benzenesulphonic acid ? ANSWER: BENZENE Sulphonic acid is more ACIDIC.

20.

What is more acedic sulphonic acid or benzenesulphonic acid

Answer»

What is more acedic sulphonic ACID or benzenesulphonic acid ?

ANSWER: BENZENE Sulphonic acid is more ACIDIC.

Discussion

21.	Calculate the RMS speed of gas with an average speed 4547 5 cm/s
Answer» ANSWER: EXPLANATION: GIVEN: VRMS = 4547.5cm/s

21.

Calculate the RMS speed of gas with an average speed 4547 5 cm/s

Answer»

ANSWER:

EXPLANATION: GIVEN: VRMS = 4547.5cm/s

Discussion

22.	What type of reaction is represented by the following equation?CaCo³-CaO+CO²
Answer» Here is URS ANSWER I HOPE it will HELP U

22.

What type of reaction is represented by the following equation?CaCo³-CaO+CO²

Answer»

Here is URS ANSWER

I HOPE it will HELP U

Discussion

23.	Difference between phosporus and phosphoric acid??
Answer» ANSWER: Phosphoric ACID is made out of phosphorus. Phosphoric acid is a mineral (inorganic) acid having the CHEMICAL FORMULA H3PO4. Phosphorus is an element. Due to its high reactivity, phosphorus is never FOUND as a free element in nature.

23.

Difference between phosporus and phosphoric acid??

Answer»

ANSWER:

Phosphoric ACID is made out of phosphorus. Phosphoric acid is a mineral (inorganic) acid having the CHEMICAL FORMULA H3PO4. Phosphorus is an element. Due to its high reactivity, phosphorus is never FOUND as a free element in nature.

Discussion

24.	What is the criteria for optical isomerism
Answer» ANSWER: In decision theory, the optimistic (aggressive) decision making rule under conditions of uncertainty. It states that the decision maker should select the COURSE of action WHOSE best (maximum) GAIN is better than the best gain of all other courses of action possible in GIVEN circumstances. See also maximin criterion.

24.

What is the criteria for optical isomerism

Answer»

ANSWER:

In decision theory, the optimistic (aggressive) decision making rule under conditions of uncertainty. It states that the decision maker should select the COURSE of action WHOSE best (maximum) GAIN is better than the best gain of all other courses of action possible in GIVEN circumstances. See also maximin criterion.

Discussion

25.	Among s-block metals and transition metals, which are more metallica) S-block metalsb) Transition metalsc) Both are equally metallicd) None of these
Answer» Your ANSWER is Transition metals Hope it HELPS you Mark as BRAINLIEST PLEASE please

25.

Among s-block metals and transition metals, which are more metallica) S-block metalsb) Transition metalsc) Both are equally metallicd) None of these

Answer»

Your ANSWER is

Transition metals

Hope it HELPS you

Mark as BRAINLIEST PLEASE please

Discussion

26.	C. gasA. Multiple Choice Questions (MCQs)1. which of the states of matter possesses maximum force of attraction between molecules?a solidb. liquidc.gasd. none of these2. The smallest unit of matter isa. an atomb. a molecule c. an element d. a compound3. A matter hasa. massb. occupies space c. both ac. both a and b d. none of these4. The state of matter which has a definite mass and volume but no definite shape is calleda. solidb. liquidc. gasd. none of these5. Inter mingling of molecules is calleda perforation b. diffusionc. freezingd. melting
Answer» ANSWER: solid atom both a and b liquid diffusion

26.

C. gasA. Multiple Choice Questions (MCQs)1. which of the states of matter possesses maximum force of attraction between molecules?a solidb. liquidc.gasd. none of these2. The smallest unit of matter isa. an atomb. a molecule c. an element d. a compound3. A matter hasa. massb. occupies space c. both ac. both a and b d. none of these4. The state of matter which has a definite mass and volume but no definite shape is calleda. solidb. liquidc. gasd. none of these5. Inter mingling of molecules is calleda perforation b. diffusionc. freezingd. melting

Answer»

ANSWER:

solid
atom
both a and b
liquid
diffusion

Discussion

27.	Drug used to induce sleep
Answer» ANSWER:BENZODIAZEPINE SEDATIVES and non-Benzodiazepine sedatives are used to induce sleep. example: quazepam-benzodiazepine zaleplon-non. benzodiazepine hope it helps you

27.

Drug used to induce sleep

Answer»

ANSWER:BENZODIAZEPINE SEDATIVES and non-Benzodiazepine sedatives are used to induce sleep.

example:

quazepam-benzodiazepine

zaleplon-non. benzodiazepine

hope

it helps you

Discussion

28.	Identify the substance that is oxidised and the substance that is reduced un the following reaction :-Fe2O3 + 2Al = Al2O3 + 2Fe
Answer» ANSWER: AL is oxidised FE2O3 GET REDUCED

28.

Identify the substance that is oxidised and the substance that is reduced un the following reaction :-Fe2O3 + 2Al = Al2O3 + 2Fe

Answer»

ANSWER:

AL is oxidised

FE2O3 GET REDUCED

Discussion

29.	Fill in the blanks4.____________retain their shape.5. Molecules in solids are__________________together6. The matter can change from one state to another by change in___________
Answer» Answer: 1. solids 5. BOUND 6. TEMPERATURE, PRESSURE

29.

Fill in the blanks4.retain their shape.5. Molecules in solids aretogether6. The matter can change from one state to another by change in_

Answer»

Answer:

1. solids

5. BOUND

6. TEMPERATURE, PRESSURE

Discussion

30.	Explain kinetic energy of the particles in the gaseous state is quite heigh.
Answer» Answer: the KINETIC energy gaseous state is QUIET high because the kinetic energy is high in gaseous state is high so that they can move in every WAY they ALSO collide themselves in SOLID there is less kinetic energy because they are tightly packed

30.

Explain kinetic energy of the particles in the gaseous state is quite heigh.

Answer»

Answer:

the KINETIC energy gaseous state is QUIET high because the kinetic energy is high in gaseous state is high so that they can move in every WAY they ALSO collide themselves in SOLID there is less kinetic energy because they are tightly packed

Discussion

31.	Name two common alloys of zinc with their property of usesNcert chemistry (science) class 10 chapter 1
Answer» Hlw✌️ Your Ans ⤵️ Zinc is ALLOYED with Lead and Tin to make solder, a metal with a relatively low melting point used to join electrical components, PIPES, and other metallic ITEMS. Other Zinc Alloys include Nickel SILVER, typewriter metal, and German Silver. ROUGHLY one third of all metallic Zinc produced today is used in galvanizing. hope you like ^^ MARK AS BRAINLIEST Follow me ✌️

31.

Name two common alloys of zinc with their property of usesNcert chemistry (science) class 10 chapter 1

Answer»

Hlw✌️

Your Ans ⤵️

Zinc is ALLOYED with Lead and Tin to make solder, a metal with a relatively low melting point used to join electrical components, PIPES, and other metallic ITEMS. Other Zinc Alloys include Nickel SILVER, typewriter metal, and German Silver. ROUGHLY one third of all metallic Zinc produced today is used in galvanizing.

hope you like ^^

MARK AS BRAINLIEST

Follow me ✌️

Discussion

32.	Oxidation numbers should be used to answer this question.A redox reaction takes place between hydroxylammonium ions, [NH3OH]+, and acidified iron(III)ions, Fe3+. The products are iron(II) ions, Fe2+, H+ ions, water and a compound of nitrogen.The mole ratio of reacting hydroxylammonium ions to reacting iron(III) ions is 1 : 2.Which nitrogen-containing compound could be formed in the reaction?A) NH3 B) N2O C) NO D) NO2Answer is B, BUT WHY?
Answer» ANSWER is B becausewhenthere HYDROGEN rects to forms HYDRO oxide lammonium

Discussion

33.	How does the colour of methyl orange change in acidic medium
Answer» Methyl ORANGE is an INDICATOR and colour changes in basic medium to yellow. Please follow if it is HELPFUL for U

33.

How does the colour of methyl orange change in acidic medium

Answer»

Methyl ORANGE is an INDICATOR and colour changes in basic medium to yellow.

Please follow if it is HELPFUL for U

Discussion

34.	D. Match the followingCOLUMN A : QUESTIONS1. Possess mass and occupies space2. Have no definite shape3. Have no definite shape and volume4. Occupy space5. Possesses a definite volume but no definite shape.6. Are highly rigid7. Are slightly compressible8. Are not compressible9. Possesses mass10. Are highly compressible and least rigid COLUMN B OPTIONS a. gases onlyb. solid onlyc. liquid onlyd. solid and liquid onlye. liquid and gases onlyf. solid and gases onlyg. solid,liquid,gasesh. matterplease answer my question correctly
Answer» Answer: 1. d) solid and LIQUID only. 2. a) GASES only. 3. c) liquid only. 4. H) matter. 5. B) solid only.

34.

D. Match the followingCOLUMN A : QUESTIONS1. Possess mass and occupies space2. Have no definite shape3. Have no definite shape and volume4. Occupy space5. Possesses a definite volume but no definite shape.6. Are highly rigid7. Are slightly compressible8. Are not compressible9. Possesses mass10. Are highly compressible and least rigid COLUMN B OPTIONS a. gases onlyb. solid onlyc. liquid onlyd. solid and liquid onlye. liquid and gases onlyf. solid and gases onlyg. solid,liquid,gasesh. matterplease answer my question correctly

Answer»

Answer:

1. d) solid and LIQUID only.

2. a) GASES only.

3. c) liquid only.

4. H) matter.

5. B) solid only.

Discussion

35.	- If an electrical gadget catches fire inlist the safety measures that you wouldyour home,follow.
Answer» EXPLANATION: I will USE fire suprssion extinguisher I will TAKE sand and spread it in fire I will CALL fire brigade

35.

- If an electrical gadget catches fire inlist the safety measures that you wouldyour home,follow.

Answer»

EXPLANATION:

I will USE fire suprssion extinguisher

I will TAKE sand and spread it in fire

I will CALL fire brigade

Discussion

36.	What type of reaction does occur during the digestion of food inside our body?
Answer» ANSWER: if you like please MARK brainliest please please please please please Explanation: decomposition reaction occurs inside our BODY during digestion of food

36.

What type of reaction does occur during the digestion of food inside our body?

Answer»

ANSWER:

if you like please MARK brainliest please please please please please

Explanation:

decomposition reaction occurs inside our BODY during digestion of food

Discussion

37.	C. Write T for True and F for False statements. Rewrite the correct statement if it is false.1. The matter has mass but does not occupy space. 2. The space between the molecules in the composition of matter is called inter atomic space.3. The matter is made up of tiny particles called atoms and molecules.4. The tiny particles in composition of a matter are tightly packed in solids, loosely packed in liquids andhave random motion in gases.5. The intermolecular force of attraction between the particles keeps them together as solid, liquids andgases.6. The gases are not compressible.7. The solids have no definite shape and volume.8. The particles of a liquid diffuse very easily.9. The force of attraction between molecules in gaseous state is very strong.10. The tiny particles in composition of matter in gaseous state are highly compressible and least rigid.
Answer» 1T 2T 3T 4F 5T 6F 7F 8T 9T 10T

37.

C. Write T for True and F for False statements. Rewrite the correct statement if it is false.1. The matter has mass but does not occupy space. 2. The space between the molecules in the composition of matter is called inter atomic space.3. The matter is made up of tiny particles called atoms and molecules.4. The tiny particles in composition of a matter are tightly packed in solids, loosely packed in liquids andhave random motion in gases.5. The intermolecular force of attraction between the particles keeps them together as solid, liquids andgases.6. The gases are not compressible.7. The solids have no definite shape and volume.8. The particles of a liquid diffuse very easily.9. The force of attraction between molecules in gaseous state is very strong.10. The tiny particles in composition of matter in gaseous state are highly compressible and least rigid.

Answer»

1T

2T

3T

4F

5T

6F

7F

8T

9T

10T

Discussion

38.	(B) Derive Kinetic gas equation.
Answer» Answer: Kinetic Gas Equation Derivation. Kinetic gas equation can also be REPRESENTED in the form of MASS or density of the gas. = 1/3 MU2 as mN= M, the total mass of the gas. = --- du2 where d = density of the gas which is the ration of the mass M and VOLUME V Explanation: hope it will HELP you

38.

(B) Derive Kinetic gas equation.

Answer»

Answer:

Kinetic Gas Equation Derivation. Kinetic gas equation can also be REPRESENTED in the form of MASS or density of the gas. = 1/3 MU2 as mN= M, the total mass of the gas. = --- du2 where d = density of the gas which is the ration of the mass M and VOLUME V

Explanation:

hope it will HELP you

Discussion

39.	Al(OH)3------>AL2O3 +H2Oplease balance this equation
Answer» Answer: 2 AL ( OH) 3 ----- AL2O3 + 3 H2O HOPE IT HELPS YOU

39.

Al(OH)3------>AL2O3 +H2Oplease balance this equation

Answer»

Answer:

2 AL ( OH) 3 ----- AL2O3 + 3 H2O

HOPE IT HELPS YOU

Discussion

40.	Which of the following obey octet rule and NO2,H2SO4,SCl2,BCl3
Answer» Answer: SCL2 obey octet rule as TWO VALENCE electrons of SULPHUR and shared by CHLORINE atoms and both the atoms get octet configuration

40.

Which of the following obey octet rule and NO2,H2SO4,SCl2,BCl3

Answer»

Answer:

SCL2 obey octet rule as TWO VALENCE electrons of SULPHUR and shared by CHLORINE atoms and both the atoms get octet configuration

Discussion

41.	. 7. write the name of the elements present in the following:- a). methane. b). glucose. c). bleaching powder d). chalk. e). water. f). calcium chloride. g). graphite. h). salt i). sugar. h). bleaching powder. i) gypsum j). and. k). limestone is). dry ice
Answer» Answer: ELEMENT present in Methane: Carbon and Hydrogen Bleaching Powder: Calcium, Hydrogen, Chlorine Chalk: Calcium, Carbon Water: Hydrogen and Oxygen Calcium carbonate: Calcium, Oxygen Graphite: Carbon Salt: SODIUM, Chlorine Sugar: Carbon, Hydrogen, Oxygen Bleaching powder: Calcium, Hydrogen, Chlorine Gypsum: Calcium, SULPHUR, Hydrogen and oxygen Lime stone: Calcium, Carbon, Oxygen Dry ice: Carbon, Oxygen Explanation:

41.

. 7. write the name of the elements present in the following:- a). methane. b). glucose. c). bleaching powder d). chalk. e). water. f). calcium chloride. g). graphite. h). salt i). sugar. h). bleaching powder. i) gypsum j). and. k). limestone is). dry ice

Answer»

Answer:

ELEMENT present in Methane: Carbon and Hydrogen

Bleaching Powder: Calcium, Hydrogen, Chlorine

Chalk: Calcium, Carbon

Water: Hydrogen and Oxygen

Calcium carbonate: Calcium, Oxygen

Graphite: Carbon

Salt: SODIUM, Chlorine

Sugar: Carbon, Hydrogen, Oxygen

Bleaching powder: Calcium, Hydrogen, Chlorine

Gypsum: Calcium, SULPHUR, Hydrogen and oxygen

Lime stone: Calcium, Carbon, Oxygen

Dry ice: Carbon, Oxygen

Explanation:

Discussion

42.	8. Which of the following elements has the largest melting point?. (A) B(B) Al(C) Ga(D) In
Answer» ANSWER: BORON has the LARGEST MELTING POINT. :D

42.

8. Which of the following elements has the largest melting point?. (A) B(B) Al(C) Ga(D) In

Answer»

ANSWER:

BORON has the LARGEST MELTING POINT.

:D

Discussion

43.	Answer it if you can full ques is in attachment a Quiz for all of youDon't even think to spam !!Genius account
Answer» Buffer Quiz A) Option C is the answer Reason: A buffer is able to neutralize small amounts of added acid or base thus maintaining the pH of solution relatively stable. B) Option B is the answer Reason: A mixture of a WEAK acid and its CONJUGATE base (or a mixture of a weak base and its conjugate acid) is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added C) Option B is the answer Reason: Acetic acid (CH3COOH) and sodium acetate (CH3COONa) or weak base and its salt, such as, AMMONIA (NH3) and ammonium chloride (NH4Cl). D) Option A: Ethanoic acid and sodium Ethanoic acid and sodium Hydroxide. Reason: Let if the solution contained equal molar concentrations of both the acid and the salt, it would have a pH of 4.76. It wouldn't matter what the concentrations were, as long as they were the same. E) Option C is the answer Reason: Consider a buffer solution containing 0.1 mole each of acetic acid and sodium acetate in a 0.1 L of solution. 0.01 mole of NaOH is gradually added to this buffer solution. F)

43.

Answer it if you can full ques is in attachment a Quiz for all of youDon't even think to spam !!Genius account

Answer»

Buffer Quiz

A) Option C is the answer

Reason: A buffer is able to neutralize small amounts of added acid or base thus maintaining the pH of solution relatively stable.

B) Option B is the answer

Reason: A mixture of a WEAK acid and its CONJUGATE base (or a mixture of a weak base and its conjugate acid) is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added

C) Option B is the answer

Reason: Acetic acid (CH3COOH) and sodium acetate (CH3COONa) or weak base and its salt, such as, AMMONIA (NH3) and ammonium chloride (NH4Cl).

D) Option A: Ethanoic acid and sodium Ethanoic acid and sodium Hydroxide.

Reason: Let if the solution contained equal molar concentrations of both the acid and the salt, it would have a pH of 4.76. It wouldn't matter what the concentrations were, as long as they were the same.

E) Option C is the answer

Reason: Consider a buffer solution containing 0.1 mole each of acetic acid and sodium acetate in a 0.1 L of solution. 0.01 mole of NaOH is gradually added to this buffer solution.

F)

Discussion

44.	Q2. Write the electronic configuration of elements Nitrogen with atomic number 7, Magnesium with atomic number 12 and Phosphorus with atomic number 15.
Answer» I HOPE it HELPS you.......................

Discussion

45.	Name some bases which react with metals.... Don't spam....Follow me....Jai Siyaram....
Answer» Answer: When alkali (BASE) reacts with metal, it produces salt and hydrogen GAS. Example: Sodium hydroxide gives hydrogen gas and sodium zincate when reacts with ZINC metal. Sodium ALUMINATE and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal.

45.

Name some bases which react with metals.... Don't spam....Follow me....Jai Siyaram....

Answer»

Answer:

When alkali (BASE) reacts with metal, it produces salt and hydrogen GAS. Example: Sodium hydroxide gives hydrogen gas and sodium zincate when reacts with ZINC metal. Sodium ALUMINATE and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal.

Discussion

46.	Types of chemical RX
Answer» ANSWER: Combination. Decomposition. Single displacement. Double displacement. Combustion. Redox Explanation: HOPE it will HELP you

46.

Types of chemical RX

Answer»

ANSWER:

Combination.
Decomposition.
Single displacement.
Double displacement.
Combustion.
Redox

Explanation:

HOPE it will HELP you

Discussion

47.	What happens when aspirin is refluxed with dilute hydrochloric acid ?
Answer» Answer: In that case the aspirin NEUTRALIZES a PART of the ACID equivalent to its mass

47.

What happens when aspirin is refluxed with dilute hydrochloric acid ?

Answer»

Answer:

In that case the aspirin NEUTRALIZES a PART of the ACID equivalent to its mass

Discussion

48.	Which catalyst is used in the equation, C₆H₅CHO + CH₃COCH₃ → C₆H₅CH = CHCOCH₃?A) NaOHB) KMNO₄C) K₂Cr₂O₇ D) LiAlH₄
Answer» ANSWER: D}LiAlH4 Explanation:

48.

Which catalyst is used in the equation, C₆H₅CHO + CH₃COCH₃ → C₆H₅CH = CHCOCH₃?A) NaOHB) KMNO₄C) K₂Cr₂O₇ D) LiAlH₄

Answer»

ANSWER:

D}LiAlH4

Explanation:

Discussion

49.	During de-excitation of electrons say from the 5th orbit to 1st orbit, does it enter the orbits in between?
Answer» No during the de-exicitation of ELECTRONS from 5TH ORBIT to 1ST orbit it does not enter the orbits in between it just passes from them

49.

During de-excitation of electrons say from the 5th orbit to 1st orbit, does it enter the orbits in between?

Answer»

No during the de-exicitation of ELECTRONS from 5TH ORBIT to 1ST orbit it does not enter the orbits in between it just passes from them

Discussion

50.	Write the formula for determination of molecular weight
Answer» ANSWER: calculate the atomic mass of a single ATOM of an ELEMENT, add up the mass of protons and neutrons. Example: FIND the atomic mass of an isotope of carbon that has 7 neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons. Explanation: hope it will help you

50.

Write the formula for determination of molecular weight

Answer»

ANSWER:

calculate the atomic mass of a single ATOM of an ELEMENT, add up the mass of protons and neutrons. Example: FIND the atomic mass of an isotope of carbon that has 7 neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons.

Explanation:

hope it will help you

Discussion

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Answer it if you can full ques is in attachment a Quiz for all of youDon't even think to spam !!Genius account

Buffer Quiz

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I HOPE it HELPS you.......................

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What happens when aspirin is refluxed with dilute hydrochloric acid ?

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A solution of a substance is used for white washing. name the substance with it's formula?

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A compound has 20% carbon 46% nitrogen 6.7% hydrogen and rest is zero what empirical formula

Glass is made of the mixture of A. Quartz and micaB. Sand and saltC. Sand and silicatesD. None of these

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Name some bases which react with metals.... Don't spam....Follow me....Jai Siyaram....

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