Radioactivity and Nuclear Chemistry · Chemistry · WB JEE
MCQ (Single Correct Answer)
1
$$\begin{aligned} &{ }_5 \mathrm{~B}^{10}+{ }_2 \mathrm{He}^4 \rightarrow \mathrm{X}+{ }_0 \mathrm{n}^1\\ &\text { In the above nuclear reaction ' } X \text { ' will be } \end{aligned}$$
WB JEE 2025
2
After the emission of a $$\beta$$-particle followed by an $$\alpha$$-particle from $${ }_{83}^{214} \mathrm{Bi}$$, the number of neutrons in the atom is -
WB JEE 2024
3
If in case of a radio isotope the value of half-life (T$$_{1/2}$$) and decay constant ($$\lambda$$) are identical in magnitude, then their value should be
WB JEE 2023
4
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
WB JEE 2021
5
The half-life period of $${}_{53}{I^{125}}$$ is 60 days. The radioactivity after 180 days will be
WB JEE 2019
6
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
$${}_{82}{A^{210}}\buildrel {} \over \longrightarrow B\buildrel {} \over \longrightarrow C\buildrel {} \over \longrightarrow {}_{82}{A^{206}}$$
The sequence of emission can be
WB JEE 2019
7
Which atomic species cannot be used as a nuclear fuel?
WB JEE 2019
8
The half-life of C14 is 5760 years. For a 200 mg sample of C14, the time taken to change to 25 mg is
WB JEE 2018
9
The nucleus $$_{29}^{64}$$Cu accepts an orbital electron to yield,
WB JEE 2018
10
C6H5F18 is a F18 radio-isotope labelled organic compound. F18 decays by positron emission. The product resulting on decay is
WB JEE 2017
11
If radium and chlorine combine to form radium chloride, the compound would be
WB JEE 2016
12
An element E loses one $$\alpha$$ and two $$\beta$$-particles in three successive stages. The resulting element will be
WB JEE 2016