Q.

The Vander waal’s equation for a gas is p+av2vb=nRTwhere P, V, R, T and n

            represent the  pressure, volume, universal gas constant, absolute temperature and number of

            moles of a gas respectively. a and b are constants, the ratio b/a will have the following

            dimensional formula

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a

M1L1T1

b

MLT2

c

ML2T2

d

M1L2T2

answer is A.

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Detailed Solution

p+av2v-b=NRT p and av2are same dimensional quantities.   v=b b=L3 p=av2 a=ML1T2L6 a=M1L5T2 ba=L3M1L5T2=M1L2T2

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