1.

The equation of state for a real gas such as hydrogen oxygen etc. is called the Van der waal's equation which reads: -(P+(a)/(V^(2)))(V-b)-=n RT where a and b are constants of the gas. The dimensional formula of constant a is:

Answer»

`M^(-1)L^(5)T^(-1)`
`ML^(5)T^(-2)`
`ML^(-1)T^(-1)`
NONE of these

Solution :By principle of Homogeneity
`"DIM"((a)/(V^(2)))=" dim "(P)`
`THEREFORE ([a])/((L^(3))^(2))=[ML^(-1)T^(-2)]`
`rArr [a] =[ML^(5)T^(-2)]`
Thus, correct CHOICE is (B).


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