50 mL of each gas A and of gas B takes 200 and 150 s respectively for effusing through a pinhole under the similar conditions. If the molecular mass of gas B is 36, the molecular mass of gas A will be:
1. 96
2. 128
3. 32
4. 64
1. 0.8 atm
2. 0.9 atm
3. 1 atm
4. 0.5 atm
1. 12.25 U
2. 6.50 U
3. 25.00 U
4. 50.00 U
By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?
1. 2.8
2. 4.0
3. 1.4
4. 2.0
The energy absorbed by each molecule (A2) of a substance is 4.4 x 10-19 J and bond energy per molecule is 4.0 x 10-19 J. The kinetic energy of the molecule per atom will be:
1.
2.
3.
4.
A gas at 350 K and 15 bar has a molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:
1. | Z<1 and repulsive forces are dominant. |
2. | Z>1 and attractive forces are dominant. |
3. | Z>1 and repulsive forces are dominant. |
4. | Z<1 and attractive forces are dominant. |
40 milligram diatomic volatile substance is converted to vapour that displaced 4.92 mL of air at 1 atm and 300 K. Atomic weight of element X is nearly:
1. 400
2. 240
3. 200
4. 100
A certain sample of gas has a volume of 0.2 litre measured at 1 atm pressure and 0. At the same pressure but at
273, its volume will be:
1. 0.4 litre
2. 0.8 litre
3. 27.8 litre
4. 55.6 litre