Page 1 :
Manu Vatika Sr. Sec. School (Budhlada), , , , , , Date- 31/01/2022 PERIODIC TEST CLASS-12, , SUBJECT - CHEMISTRY (M.M= 20), , *All questions are compulsory., , * All questions carry equal marks., , p, , . Conductivity of 0.00241 M acetic is 7.896x10°S cm. Calculate, , the molar conductivity. If molar conductivity at infinite dilution, for acetic acid is 390.5 S cm? mol-', what is its dissociation, constant?, , . Calculate e.m.f. of the cell in which the following reaction takes, , place :, Ni(s) + 2Ag+ (0.002 M) = Ni?+ (0.160 M) + 2Ag(s), Given E°cell= 1.05V, , . A reaction is first order in A and second order in B, , (i) Write differential rate equation., , (ii) How is rate affected when the concentration of B is tripled ?, (lii)How is rate affected when the concentration of both A and B, are doubled ?, , The rate constant for the first order reaction is 60 s“*. How much, time will it take to reduce the initial concentration of the reactant, to its 1/16th value?, , . A first order reaction is 20% complete in 10 minutes. Calculate the, , time for the completion of 75% of the reaction.