ix mcq

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Question 1: In water, hydrogen and oxygen are present in the ratio of ________.

1. 1:8

2. 2:12

3. 2:3

4. 1:2

Answer: 1

Question 2 : An exampe of a triatomi! moe!ue is ___________.

1. "#one

2. $itrogen

3. %ar&on monoxide

4. 'ydrogen

Answer: 1

Question 3: (he )uantity of matter present in an o&*e!t is !aed its _________.

1. +ass

2. oume

3. -ensity

4. apour pressure

Answer: 1

Question 4: Indiisi&iity of an atom was proposed &y ___________.

1. -aton

2. /utherford

3. (homson

4. 0ohr

Answer: 1

Question : (he aue of Aogadro !onstant is ___________.

1. .22 x 124

7/23/2019 ix mcq


2. .22 x 122

3. .22 x 123

4. .22 x 123

Answer: 4

Question : A sampes of !ar&on dioxide !ontain !ar&on and oxygen in the mass

ratio of 3:8. (his is in agreement with the aw of ___________.

1. %onseration of +ass

2. %onstant 5roportion

3. +utipe 5roportion

4. /e!ipro!a 5roportion

Answer: 2

Question 6: (he atomi! mass of sodium is 23. (he num&er of moes in 4g of

sodium is ________.

1. 2

2. 1

3. 4

4.

Answer: 1

Question 8: (he moe!uar formua of potassium nitrate is ________.

1. 7$"

2. 7$"3

3. 7$"2

4. 7"$

Answer: 2

Question : 7aium is the atin name of ________.

7/23/2019 ix mcq


1. 5otassium

2. 7rypton

3. %a!ium

4. 5hosphorus

Answer: 1

Question 1: (he smaest parti!e of a su&stan!e that is !apa&e of independent

existen!e is _________.

1. Atom

2. +oe!ue

3. 9e!tron

4. 5roton

Answer: 2

Question 11:

1. Atomi! num&er

2. Atomi! mass

3. Atomi! mass s!ae

4. $um&er of ee!trons

Answer: 2

Question 12

1. 1.2

2. 1

3. 14

4. 12

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Answer: 2

Question 13: (he moe!uar mass of ammonia is _________.

1. 16 grams

2. 31 grams

3. 2 grams

4. 2 grams

Answer: 1

Question 14: Atomi! mass of !a!ium is 4. (he mass of 2. gram atoms of !a!ium

is _______.

1. 4 g

2. 2. g

3. 1 g

4. 8 g

Answer: 3

Question 1: (he num&er of atoms in a moe!ue of the eementary su&stan!e is

!aed ________.

1. Atomi! num&er

2. Aogadro num&er

3. Atomi! mass

4. Atomi!ity

Answer: 4

Question 1: Aogadro num&er represents the num&er of atoms in ________.

1. 12 grams of 12%

2. 32 grams of suphur

3. 32 grams of oxygen

4. 1 gram of 12%

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Answer: 1

Question 16 : (he num&er of moes in grams of !a!ium is _________.

1. .12 moe

2. moe

3. 1.2 moe

4. 12. moes

Answer: 1

Question 18: 2 moe!ues of nitrogen are represented &y ________.

1. $

2. 2$2

3. $2

4. 2$

Answer: 2

Question 1: "ne moe of '2" !orresponds to

1. 22.4 itre at 1 atm and 2%

2. .2 x 123 atoms of hydrogen and .2 x 123 atoms of oxygen

3. 18 g

4. 1 g

Answer: 3

Question 2: (he num&er of moe!ues in 4.2 g of ammonia is approximatey

1. 1. x 123

2. 1. x 123

3. 2. x 123

4. 3. x 123

Answer: 2

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Question 21: A sampe !ontains 22 g of !ar&on dioxide. (his is e)ua to

1. "ne moar oume of !ar&on dioxide

2. "ne moe of !ar&on dioxide

3. 'af moe of !ar&on dioxide

4. (wo moes of !ar&on dioxide

Answer: 3

ix mcq

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