Question

A radioactive element X converts into another stable element Y. Half life of X is 2 hrs. Initially only X is present. After time t, the ratio of atoms of X and Y is found to be 1 : 4, then t in hours is(a) 2(b) 4(c) between 4 and 6(d) 6

Answer 1

$<b>$

Option A is Correct

Answer 2

radioactive element X converts into another stable element Y. Half life of X is 2 hrs. Initially only X is present. After time t, the ratio of atoms of X and Y is found to be 1 : 4, then t in hours is between 4 and 6