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Chemical Kinetics · Question 72

AIPMT 2001MCQEasy📈 Topic in 38% papers+4−1
1

For the reaction; 2N2O5 4NO2 + O2 rate and rate constant are 1.02 10-4 and 3.4 10-5 s-1 respectively, then concentration of N2O5 at that time will be

  1. 1.732
  2. 3
  3. 1.02 10-4
  4. 3.4 105

Answer

(2) 3

Solution

The unit of the rate constant is s-1, so the reaction is of first order:

Rate = k[N2O5]

[N2O5] = Ratek

= 1.02 10-43.4 10-5

= 3 mol L-1

Answer: (2)

AIPMT 2001

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2

A human body required 0.01 m activity of radioactive substance after 24 hours. Half life of radioactive substance is 6 hours. Then injection of maximum activity of radioactive substance that can be injected is

  1. 0.08
  2. 0.04
  3. 0.16
  4. 0.32
AIPMT 2001
3

For the reaction 6H+ + BrO3- + 5Br- 3Br2 + 3H2O which of the following relation correctly represents the consumption and formation of products.

  1. d[Br2]dt = - 35 d[Br-]dt
  2. d[Br2]dt = 35 d[Br-]dt
  3. d[Br2]dt = - 53 d[Br-]dt
  4. d[Br2]dt = 53 d[Br-]dt
AIPMT 2000
4

A 300 g radioactive sample has a half-life of 3 hours. After 18 hours, the remaining quantity is

  1. 4.68 g
  2. 2.34 g
  3. 3.34 g
  4. 9.37 g
AIPMT 2000

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