E-PolyLearning

1. What is the order of the following chemical reaction, if the rate of formation of 'C', increases by a factor of 2.82 on doubling the concentration of 'A' and increases by a factor of 9 on trebling the concentration of 'B'?
a. 7/2
b. 7/4
c. 5/2
d. 5/4
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Answer: (a).7/2

2. For a reaction of the following type, the rate of reaction (- rₓ) is given by
a. (K₁+K₁)Cₓ
b. (K₁+K₂+K₃)Cₓ
c. K₁Cᵥ - K₂Cₓ
d. (K₁-K₂)Cₓ
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Answer: (c).K₁Cᵥ - K₂Cₓ

3. In a consecutive reaction system given below, when E₁ is much greater than E₂, the yield of B increases with the
a. increase of temperature.
b. decrease of temperature.
c. increase in initial concentration of A.
d. decrease in initial concentration of A.
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Answer: (a).increase of temperature.

4. For the irreversible elementary reactions in parallel like given below, the rate of disappearance of 'X' is equal to
a. Cᴀ(K₁+K₂)
b. Cᴀ(K₁+K₂)/2
c. Cᴀ.K₁/2
d. Cᴀ.K₂/2
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Answer: (a).Cᴀ(K₁+K₂)

5. For an isothermal variable volume batch reactor, the following relation is applicable for a first order irreversible reaction.
a. A
b. B
c. C
d. D
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Answer: (b).B

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