Test Index

JEE Advanced 2013 Paper 1

© examsnet.com

Question : 20

Total: 60

A freshly prepared sample of a radioisotope of half-life 1386 s has activity 103 disintegrations per second. Given that In2=.693, the fraction of the initial number of nuclei (expressed in nearest integer percentage) that will decay in the first 80s after preparation of the sample is:

Your Answer:

Go to Question:

Prev Question

Next Question