Statement A: Half-life of a certain radioactive element is 100 days. After 200 days, fraction left undecayed will be 25%.Statement B: CtC0=(12)n, where symbols have standard meaning.
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a
Both Statement A and Statement B are true
b
Both Statement A and Statement B are false
c
Statement A is true but Statement B is false.
d
Statement A is false but Statement B is true.
answer is A.
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Detailed Solution
Number of half-lives=n=tT=200100=2NN0=12n = 122=14=14×100%