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10. Two gases of equal mass are in thermal equilibrium.

If Pa,Pb and Va and Vb are their respective pressures and volumes, then which relation is true

(a) Pa ≠Pb  ;  Va = Vb                             (b)  Pa =Pb  ;  Va ≠ Vb

(c) (Pa /Va )  = (  Pb / Vb )                         (d)  PaVa = PbVb

Answer-d

(6)

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