1
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
For the reaction $$_7^{14}N(\alpha ,p)\,{}^{17}O$$, 1.16 MeV (Mass equivalent = 0.00124 amu) of energy is absorbed. Mass on the reactant side is 18.00567 amu and proton mass = 1.00782 amu. The atomic mass of $${}^{17}O$$ will be
A
17.0044 amu
B
16.9991 amu
C
17.0114 amu
D
16.9966 amu
2
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
The half-life period of $${}_{53}{I^{125}}$$ is 60 days. The radioactivity after 180 days will be
A
25%
B
12.5%
C
33.3%
D
3.0%
3
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
Consider, the radioactive disintegration

$${}_{82}{A^{210}}\buildrel {} \over \longrightarrow B\buildrel {} \over \longrightarrow C\buildrel {} \over \longrightarrow {}_{82}{A^{206}}$$

The sequence of emission can be
A
$$\beta$$, $$\beta$$, $$\beta$$
B
$$\alpha$$, $$\alpha$$, $$\beta$$
C
$$\beta$$, $$\beta$$, $$\gamma$$
D
$$\beta$$, $$\beta$$, $$\alpha$$
4
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
Which atomic species cannot be used as a nuclear fuel?
A
$$_{92}^{233}$$U
B
$$_{92}^{235}$$ U
C
$$_{94}^{239}$$Pu
D
$$_{92}^{238}$$U
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