Mention the term defined by the following sentence:
The mass of a given volume of gas compared to the mass of an equal volume of hydrogen.

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Solution

Relative vapour density is defined as the ratio of mass of a given volume of gas to the mass of an equal volume of hydrogen.

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Q. Assertion :The mass of a given volume of gas is compared to the mass of an equal volume of

H_{2}

. Reason: Vapour density is the ratio of the mass of a volume of a gas to the mass of an equal volume of hydrogen measured under the same conditions of temperature and pressure.

Q. The ratio of the mass of a certain volume of gas to the mass of an equal volume of hydrogen under the same conditions of temperature and pressure.

Q. A weather forecasting plastic balloon of volume

15 m^{3}

contains hydrogen of density

0.09 k g

m^{- 3}

. The volume of an equipment carried by the balloon is negligible compared to its own volume. The mass of empty balloon along is

7.15 k g

. The balloon floating in air of density

1.3 k g

m^{- 3}

. Calculate
(i) the mass of hydrogen in the balloon, (ii) the mass of hydrogen and balloon, (iii) the total mass of hydrogen, balloon and equipment if the mass of equipment is

x

kg, (iv) the mass of air dispalced by balloon, and (v) the mass of equipment using the law of floatation.

(a) Is it possible to change the temperature and pressure of a fixed mass of a gas without changing its volume? Explain your answer.
(b) Define or explain the meaning of the term 'molar volume'.

Q. As compared to volume occupied by gas, volume of particles is :

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Mention the term defined by the following sentence: The mass of a given volume of gas compared to the mass of an equal volume of hydrogen.

Relative vapour density is defined as the ratio of mass of a given volume of gas to the mass of an equal volume of hydrogen.

Mention the term defined by the following sentence:
The mass of a given volume of gas compared to the mass of an equal volume of hydrogen.