Chemical Kinetics Question 217

Question: The rate of reaction between two reactants A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is [CBSE PMT 2005]

Options:

A) - 1

B) - 2

C) 1

D) 2

Show Answer

Answer:

Correct Answer: B

Solution:

$ R=k,{{[B]}^{n}} $ ; $ \frac{1}{4}R=k{{[2B]}^{n}} $ ; $ 4={{( \frac{1}{2} )}^{n}} $ ; $ 4={2^{-n}} $ ; $ n=-2 $ .



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