1
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

The radius of a muonic hydrogen atom is 2.5 $$\times$$ 10$$-$$13 m. The total atomic volume (in m3) of a mole of such hydrogen atoms is (Take, $$\pi$$ = 3.14)

A
3.94 $$\times$$ 10$$-$$14
B
3.09 $$\times$$ 10$$-$$14
C
4 $$\times$$ 10$$-$$14
D
3.9 $$\times$$ 10$$-$$14
2
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

A radioactive sample at any instant has its disintegration rate 5000 disintegrations per min. After 5 min, the rate is 1250 disintegrations per min. Then, the disintegration constant (per min) is

A
0.4 loge 2
B
0.2 loge 2
C
0.1 loge 2
D
0.8 loge 2
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