Chemical Kinetics Question 218

Question: If a substance with half life 3 days is taken at other place in 12 days. What amount of substance is left now [AFMC 2005]

Options:

A) 1/4

B) 1/8

C) 1/16

D) 1/32

Show Answer

Answer:

Correct Answer: C

Solution:

T=t1/2×n i.e. 12=3×nn=4

N=N0(12)nNN0=(12)4=116



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