Chemical Kinetics Question 216

Question: For a first order reaction $ A\to B $ the reaction rate at reactant concentration of $ 0.01M $ is found to be $ 2.0\times {10^{-5}}mol\ {L^{-1}}s^{1} $ . The half life period of the reaction is [CBSE PMT 2005]

Options:

A) 220 s

B) 30 s

C) 300 s

D) 347 s

Show Answer

Answer:

Correct Answer: D

Solution:

$ R=K[A] $

$ 2\times {10^{-5}}=K\times {10^{-2}} $

$ K=2\times {10^{-3}},{{\sec }^{-1}} $

$ {t_{1/2}}=\frac{.693}{K}=\frac{.693}{2\times {10^{-3}}}=\frac{693}{2}=347,\sec $



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक