for the reaction A(g) + B(g)⇌C(g) the equilibrium partial pressures P_A=0.15 atm and P_C=0.30 atm.When the volume of the reaction vessel was reduced to such an extent that on re-establishing the equilibrium,the partial pressures of A and B were doubled.the partial pressure of C would be

Hey Student
For this question you just have to use the le chatliers principle
try to first of all write down the balanced chemical equation and write down the partial pressures corresponding to all the species. Once you got the partial pressures, you then need to consider the effect of change in reaction vessel’s volume and use the le chatliers principle