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Free Online Mock Chemistry Multiple Choice Test on Chemical Kinetics
Sub Category : Chemical Kinetics Test : 13 Time Left :
1) The rate of reaction is doubled for every 10° rise in temperature. The increase in reaction rate as a result of temperature rise from 10° to 100° is (1) 112 (2) 512 (3) 400 (4) 614
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2) In a first reaction, 75% of the reactants disappeared in 1.386 hr. What is the rate constant? (1) 3.6Ã-10-3s-1 (2)2.7Ã-10-4 s-1 (3) 72Ã-10-3 s-1 (4) 1.8Ã-10-3 s-1
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3) Which of the following statements about the catalyst is true? (1) A catalyst accelerates the rate of reaction by bringing down the energy activation. (2) A catalyst does not participate in reaction mechanism. (3) A catalyst makes the reaction more feasible by making Delta G more negative (4) A catalyst makes equilibrium constant more favourable for forward reaction.
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4) A substance 'A' decomposes in solution following the first order kinetics. Flask I contains 1 L of 1 M solution of A and flask II contains 100 ml of 0.6 M solution. After 8 hrs, the concentration of A in flask I becomes 0.25 M, what will be the time for concentration of A in flask II to become 0.3 M?
(1) 0.4 hr (2) 2.4 hr (3) 4.0 hr (4) unpredictable as rate constant is not given
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5)Which one of the following statements about the order of a rection is true?
(1) The order of a reaction can only be determined by experiment (2) The order of a reaction increases with increase in temperature (3) The order of a rection can be determined from the balanced equation (4) A second order reaction is also bimolecular
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