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Free Online Mock Chemistry Multiple Choice Test on Chemical Kinetics
Sub Category : Chemical Kinetics Test : 6 Time Left :
1) Consider a reaction A to B + C if the initial concentration of A was reduced from 2 M in 1 hour and then form 1 M to 0.25 M in 2 hours, the order of the reaction is(1) 1 (2) 0 (3) 2 (4) 3
  1 2 3 4
 
2) 18O has a half-life of 4650 years. 200 mg of a sample of 18O is reduced to 25 m in(1) 13950 years (2) 9300 years (3) 1215 years (4) 4650 years
  1 2 3 4
 
3) A sample of a radioactive substance undergoes 80% decomposition in 345 minutes. Its half life is…..minutes.(1) In2/In 5 x 345 (2) In 5/In 2 x 345 (3) In 5 / In 4 x 345 (4) In 4/In 5 x 345
1 2 3 4
 
4) For the decomposition of HI at 1000 K 2HI to H2 + I2 the following data were obtained [HI] Rate of decomposition of HI (mol.L-1) (mol.L-1s-1) 0.10 2.75 x 10-8 0.20 11.00x10-8 0.30 24.75 x 10-8 The order of the reaction is (1) 1 (2) 2 (3) 0 (4) 1.5
1 2 3 4
 
5) For a third order reaction, 3X  Y + Z, the initial rate is 5 x 10-2 mol L-1 s-1 when the conc. Of X is 0.1 mol L-1 s-1 the value of rate constant for the reaction is(1) 5 x 10-2 L2 mol-2 s-1 (2) 5 x 10-3 L2 s-1 (3) 5 x 10-4 L2 mol-2 s-1 (4) 50 L2 mol-2 s-1
1 2 3 4
 
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