Question: The pressure’of a gas in terms of its mean kinetic energy per unit volume E is equal to________________?

• 1. E/3
• 2. E/2
• 3. 3E/4
• 4. 2E/3

Question: No liquid can exist as liquid at____________________?

• 1. – 273 °K
• 2. vacuum
• 3. zero pressure
• 4. centre of earth

Question: According to kinetic theory of gases, the absolute zero temperature is attained when___________________?

• 1. volume of the gas is zero
• 2. pressure of the gas is zero
• 3. kinetic energy of the molecules is zero
• 4. specific heat of gas is zero

Question: A closed system is one in which_________________________?

• 1. mass does not cross boundaries of the system, though energy may do so
• 2. mass crosses the boundary but not the energy
• 3. neither mass nor energy crosses the boundaries of the system
• 4. both energy and mass cross the boundaries of the system

Question: Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits ?

• 1. 02, N2, steam, C02
• 2. Oz, N2, water vapour
• 3. S02, NH3, C02, moisture
• 4. 02, N2, H2, air

Question: According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as____________________?

• 1. temperature
• 2. absolute
• 3. absolute temperature, if volume is kept constant
• 4. volume, if temperature is kept constant

Question: The unit of length in S.I. units is________________?

• 1. meter
• 2. centimeter
• 3. kilometer
• 4. millimeter

Question: The unit of temperature in S.I. units is _________________?

• 1. Centigrade
• 2. Celsius
• 3. Fahrenheit
• 4. Kelvin

Question: Which of the following laws is applicable for the behavior of a perfect gas__________________?

• 1. Boyle’s law
• 2. Charles’law
• 3. Gay-Lussac law
• 4. all of the above

Question: The unit of time in S.I. units is__________________?

• 1. second
• 2. minute
• 3. hour
• 4. day