PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 6

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10th West Bengal Board

IMPORTANT

Earn 100

On heating ${PH}_{3}$ gas it dissociates into solid phosphorus and $H_{2}$ gas. $100 mL$ of ${PH}_{3}$ is heated. The volume change in the reaction Is:

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Important Questions on Chemical Calculations

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10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 7

The amount of water formed by the combustion of

16 g

methane is:

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10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 1

The empirical formula of Acetylene is _____.

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10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 3

Molecular mass of a gas =

n \times

_____ formula mass.

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10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 4

H_{2} (g)

reacts with

N_{2} (g)

to produce gaseous ammonia. The ratio of their volume is _____.

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10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 5

100 g

of calcium carbonate produces _____

L

of

{CO}_{2}

at STP.

EASY

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 6

40 g

NaOH

neutralises _____

g

sulphuric acid completely.

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10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 7

The number of atoms presents in one molecule of an element is called its _____.

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10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 3 - Chemical Calculations>EXERCISE>Q 1

The empirical formula and the molecular formula of carbon dioxide are the same.