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Free Online Mock Chemistry Multiple Choice Test on Chemical Kinetics
Sub Category : Chemical Kinetics Test : 1 Time Left :
1) A gaseous reaction, A2(g) to B(g) + ½ C(g) Shows increases in pressure from 100 mm to 120 mm in 5 minutes. The rate of disappearance of A2 is(1) 4 mm min-1 (2) 8 mm min-1 (3) 16 mm min-1 (4) 2 min min-1
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2) In the formation of sulphur trioxide by the contact process, 2SO2(g) + O2(g) to 2SO3 (g) The rate of reaction is expressed as -d(O2)/dt = 2.5 x 10-4 mol L-1 sec-1. The rate of disappearance of (SO2) will be(1) 5.0 x 10-4 mol L-1 s-1 (2) -2.25 x 10-4 mol L-1 s-1 (3) 3.75 x 10-4 mol L-1 s-1 (4) 50.0 x 10-4 mol L-1 s-1
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3) In a catalytic reaction involving the formation of ammonia by Haber’s process N2 + 3H2 to 2NH3, the rate of appearance of NH3 was measured as 2.5 x 10-4 mol L-1 s-1. The rate of disappearance of H2 will be(1) 2.50 x 10-4 mol L-1 s-1 (2) 1.25 x 10-4 mol L-1 s-1 (3) 3.75 x 10-4 (4) 50.0 x 10-4 mol L-1 s-1
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4) For the reaction 4A + B to 2C + 2D, which of the following statements is not correct;(1) Rate of dissappearence of B is 1/4th of the rte of disappearence of A (2) Rate of formation of C is ½ the rate of consumption of A (3) Rate of appearance of D is ½ the rate of disappearence (4) Rate of formation of C and D are equal
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5) For the hypothetical reaction; A to Products; rate = -k[A] The negative sign used in the rate expression indicates that(1) The rate is decreasing with time (2) The concentration of reactants decrease with time (3) There are repulsive forces between the reactants (4) The reaction is reversible
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