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Question 6 : Powdered marble reacts more rapidly with HCl than the chips of marble because: Surface area of powdered marble is more that of chips of marble and hence there is more collisions between the molecules of reactants Number of molecules increases. Energy of activation decreases Marble chips will not react with HCl Question 7 : In the reaction: 2 B → P r o d u c t 2B→Product ; the rate equation is: Rate = k[B]. If the concentration of ‘B’ is doubled, the rate of reaction will increase by a multiple of Four Three None of these Two Question 8 : For a reaction: 2 H 2 + 2 N O → 2 H 2 O + N 2 2H2+2NO→2H2O+N2 the rate law is R = K [ H 2 ] [ N O ] 2 R=K[H2][NO]2 The Order of the reaction is? 2 3 0 1
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