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Free Online Mock Chemistry Multiple Choice Test on Chemical Kinetics
Sub Category : Chemical Kinetics Test : 16 Time Left :
1) The rate law for a reaction between the substances A and B is given by rate = k[A]n [B]m. On doubling the concentration of A and halving the conc. of B, the ratio of the new rate to the earlier rate of reaction will be(1) 1/2m+n (2) m + n (3) n-m (4)2(n-m)
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2) The unit of second order reaction rate constant is(1) lit-1 mol sec-1 (2) lit2 mol-2 sec-1 (3) lit mol-1 sec-1 (4) sec-1
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3)The half life of a reaction is halved as the initial conc. of the reactant is doubled. The order of the reaction is
(1) 0.5 (2) 1.0 (3) 2.0 (4)0
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4) In a first order reaction, the conc. of reactant decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is
(1) 30 min (2) 60 min (30 7.5 min (4) 15 min
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5) The rate equation for the reaction, 2A + B -> C is found to be : rate = k[A] [B]. The correct statement in relation to this reaction is that the(1) unit of k must be s-1 (2) value of k is independent of the initial concentrations of A and B (3) rate of formation of C is twice the rate of disappearance of A (4) t1/2 is a constant
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