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 $ .
