The compressibility factor for H2 and He is usually:

(1) >1                                     

(2) =1

(3) <1                                     

(4) either of these

Subtopic:  Compressibility Factor |
 72%
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In van der Waals' equation of state of the gas, the constant 'b' is a measure of:

(a) intermolecular collisions per unit volume

(b) intermolecular attraction

(c) volume occupied by molecules

(d) intermolecular repulsions

Subtopic:  van der Waal’s Correction |
 77%
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Which curve does not represent Boyle's law?

Subtopic:  Gas Laws |
 74%
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At which one of the following temperature pressure conditions, the deviation of a gas from ideal behaviour is expected to be minimum?                                     

(1) 350 K and 3 atm                   

(2) 550 K and 1 atm

(3) 250 K and 4 atm                   

(4) 450 K and 2 atm

Subtopic:  Gas Laws |
 76%
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Select the correct statement. In the gas equation PV = nRT                 

(1) n is the number of molecules of a gas

(2) V denotes the volume of 1 mole of the gas

(3) n moles of the gas have a volume V

(4) p is the pressure of the gas when only one mole of the gas is present

Subtopic:  Gas Laws |
 75%
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The ratio among most probable velocity, mean velocity and root mean square velocity is given by

(a) 1:2:3                           (b) 1: 2:3

(c) 2:3:8π                (d) 2:8π:3

Subtopic:  Molecular Velocity |
 85%
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20 L of SO2 diffuses through a porous partition in 60s. Volume of O2 diffuse under similar condition in 30s will be:-

1. 12.14 L

2. 14.14 L

3. 18.14 L

4. 28.14 L

Subtopic:  Graham's Law |
 73%
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Joule-Thomson coefficient (T/P)H for an ideal gas is:

(a) zero                                  (b) +ve

(c) -ve                                    (d) none of these

Subtopic:  Liquefaction of Gases & Liquid |
 68%
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The unit of van der Waals' constant 'b' is -

1. cm3 mol-1

2. litre mol-1

3. m3 mol-1

4. All of the above

Subtopic:  van der Waal’s Correction |
 74%
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Boyle's law is applicable in :

(1) isobaric process

(2) isochoric process

(3) isothermal process

(4) adiabatic process

Subtopic:  Gas Laws |
 91%
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