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##### A gas occupies a volume of 800 \mathrm{~cm}^{3} at 1 \mathrm{~atm} when it is allowed to expand up to 1200 \mathrm{~cm}^{3} what will be its pressure in \mathrm{mm} of \mathrm{Hg} .

5. Define the term allotropy with examples.

11. The vapour pressure of a liquid increases with the:(a) increase of pressure(b) increase of temperature(c) increase of intermolecular forces(d) increase of polarity of molecules

1. Convert the following units:(c) 560 torr to \mathrm{cm} \mathrm{Hg}

A sample of neon gas occupies a volume of 75.0 \mathrm{~cm}^{3} at very low pressure of 0.4 \mathrm{~atm} . Assuming temperature remain constant what would be the volume at 1.0 \mathrm{~atm} . pressure?

5. Which one of the following is not amorphous?(a) rubber(b) plastic(c) glass(d) glucose.

1. How many times liquids are denser than gases?(a) 100 times(b) 1000 times(c) 10000 times(d) 100000 times