NEET Chemistry States of Matter Questions Solved


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

(a) λ=2πσ2N                                (b) λ=1/2πσ2N

(c) λ=2πμσ2N                               (d) none of these

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Which is lighter than dry air?

(a) Moist air                              (b) SO2

(c) Cl2                                      (d) O2

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The ratio a/b (the terms used in van der Waals' equation) has the unit:

(a) atm lire mol-1                             (b) atm dm3 mol-1

(c) dyne cm mol-1                            (d) all of these

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

(a) both remains same

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

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

(d) both varies

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

(a) PV = RT

(b) PV = RT + a/v

(c) PV = RT + Pb

(d) PV = RT - a/V2

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

(a) AT high temperature and low pressure

(b) At low temperature and high pressure

(c) At high temperature and high pressure

(d) At low temperature and low pressure

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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

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

                       Ice WaterVapour exist at:

(a) 3.85 mm and 0.0981 °C

(b) 4.58 mm and 0.0098 °C

(c) 760 mm and 0°C

(d) none of the above

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

(a) atm litre2 mol-2                        (b) dyne cm4 mol-2

(c) newton m4 mol-2                     (d) all of these           

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The unit of van der Waals' constant 'b' is :

(a) cm3 mol-1

(b) litre mol-1

(c) m3 mol-1

(d) all of these 

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