A) decays\[\frac{\text{3}}{\text{4}}\text{th}\]
B) remains\[\frac{\text{3}}{\text{4}}\text{th}\]
C) decays\[\frac{1}{2}\text{th}\]
D) remains\[\frac{1}{2}\text{th}\]
Correct Answer: A
Solution :
You must remember that \[{{t}_{1/2}}\] is time in which substance decays half. Hence, in \[{{t}_{3/4}}\] time substance decays\[\frac{3}{4}\text{th}\].
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