1.

Assertion : Activity of 10^(8) undecayed radioactive nucei of half life 50 days is equal to that of 10 xx 10^(8) number of undecayed nuclei of some other material with half life 60 days. Reason : Activity is proportional to half life

Answer»

Both A and R are true and R is the CORRECT EXPLANATION of A
Both A and R are true but R is not a correct explanation of A
A is true but R is FALSE
A is false but R is true

Answer :A


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