The mean free path (λ) of a gas sample is given by:

(1) λ=2πσ2N                               

(2) λ=1/2πσ2N

(3) λ=2πμσ2N                               

(4) none of these

Concept Questions :-

Kinetic Theory of Gas
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Which is lighter than dry air?

(1) Moist air                             

(2) SO2

(3) Cl2                                      

(4) O2

Concept Questions :-

Introduction to States of Matter
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The ratio a/b (the terms used in van der Waals' equation) has the unit:

(1) atm lire mol-1                           

 (2) atm dm3 mol-1

(3) dyne cm mol-1                           

(4) all of these

Concept Questions :-

Vanderwaal Correction
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In the vander Waals' equation, the constant 'a' and 'b' with temperature shows which trend:

(1) both remains same

(2) 'a' remains same, 'b' varies

(3) 'a' varies, 'b' remains same

(4) both varies

Concept Questions :-

Vanderwaal Correction
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At relatively high pressure, van der Waals' equation reduces to:

(1) PV = RT

(2) PV = RT + a/v

(3) PV = RT + Pb

(4) PV = RT - a/V2

Concept Questions :-

Vanderwaal Correction
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When is the deviation more in the behaviour of a gas from the ideal gas equation pV=nRT?     

(1) AT high temperature and low pressure

(2) At low temperature and high pressure

(3) At high temperature and high pressure

(4) At low temperature and low pressure

Concept Questions :-

Kinetic Theory of Gas
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Joule-Thomson coefficient (T/P)H for an ideal gas is:

(1) zero                                 

(2) +ve

(3) -ve                                   

(4) none of these

Concept Questions :-

Liquefaction of Gases
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All the three states H2O, i.e., the triple point for H2O the equilibrium,

                       Ice WaterVapour exist at:

(1) 3.85 mm and 0.0981 °C

(2) 4.58 mm and 0.0098 °C

(3) 760 mm and 0°C

(4) none of the above

Concept Questions :-

Liquefaction of Gases
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The unit of van der Waals' constant 'a' is:

(1) atm litre2 mol-2                       

(2) dyne cm4 mol-2

(3) newton m4 mol-2                     

(4) all of these           

Concept Questions :-

Vanderwaal Correction
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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 these 

Concept Questions :-

Vanderwaal Correction
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Difficulty Level: