Chemical Kinetics Test

Result

Chemical Kinetics Test - 2

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Weekly Quiz Competition

Question 1
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Direction (Q. Nos. 1-13) This section contains multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct
Q. In the following reaction, which has maximum rate w.r.t. rate of disappearance of NH₃ ?
4NH₃ + 50₂ → 4NO + 6H₂ O

A
O₂

B
NO

C
H₂ O

D
Equal

Solution

By stoichiometry of the reaction
Question 2
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The rate of formation of NO(g) in the reaction, 2NOBr(g) →2NO(g) + Br₂ (g) was reported as 1.6 x 10^-4 Ms^-1 . Thus, rate of the reaction is

A
1.6 x 10^-4 Ms^-1

B
8.0 x 10^-5 MS^-1

C
3.2 x 10^-4 Ms^-1

D
6.4 x 10^-4 MS^-1

Solution
Question 3
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Rate of formation of SO₃ in the reaction below is 100 kg min^-1 .
2SO₂ + O₂ → 2SO₃
Hence, rate of disappearance of SO₂ will be:

A
100kg min^-1

B
80 kg min^-1

C
64 kg min^-1

D
32 kg min^-1

Solution

Rate of disappearance of SO₂ = Rate of formation of SO₃ But quantity is to be expressed in terms of moles.
Rate of formation of SO₃ = 100 kg SO₃ min-¹
Question 4
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The following reaction can take place in both directions:

For the forward reaction, the rate varies with the concentration of A as and for the backward reaction,

Hence, net reaction rate is:

A
= K₁ [A] - K₂ [B]

B
= (K_{1 -} K₂ [B])

C
= (K₁ [A]-K₂ )

D
= (k₁ -k₂ )

Solution
Question 5
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For a reaction, xA →yB, rate of disappearance of ‘A ’is related to the rate of appearance of 'B 'by the equation
Thus, x and y respectively are

A
1,2

B
2,4

C
1/2, 2

D
4,1

Solution
Question 6
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For the reaction,
H₂ (g) + A₂ (g) 2H(g) + A₂ (g)
k_f = 2.2 x 10⁴ L mol^-1 s^-1 and K_c = 1.00 x 10^-4 at 3000 K. Thus, k_b is

A
2.2 x 10⁸ L² mol^-2 s^-1

B
0.45 x 10^-8 L^-2 mol² s^-1

C
2.2 L mol^-1 s^-1

D
0.45L^-1 mol s^-1

Solution
Question 7
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For a reaction,

hen x, y and z are

A
1:1:1

B
3:2:3

C
3:3:2

D
2:2:3

Solution

For the reaction: xA + yB →zC

Given that,

Multiplying equation 2 by 1/3, we get

On comparing equation 1 and 3,
x = 3, y = 3, z = 2.
Question 8
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For the reaction,
2N₂ O₅ (g) →4NO₂ (g) + O₂ (G)
Thus,

A
k₁ = k₂ = k₃

B
2k₁ = k₂ = 4k₃

C
2k₁ = 4k₂ = k₃

D
None of these

Solution
Question 9
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The decomposition of acetaldehyde is given by the following reaction:
CH₃ CHO(g) →CH₄ (g) + CO(g)
Rate of the reaction with respect to the pressure of the reactant is

A
- dp/dt

B

C

D
none

Solution
Question 10
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For the reaction,
then rate law is

A

B

C

D

Solution