Question

Match the LIST-I with LIST-II

\[ \begin{array}{|l|l|} \hline \text{LIST-I} & \text{LIST-II} \\ \hline A. \ ^{236}_{92} U \rightarrow ^{94}_{38} Sr + ^{140}_{54} Xe + 2n & \text{I. Chemical Reaction} \\ \hline B. \ 2H_2 + O_2 \rightarrow 2H_2O & \text{II. Fusion with +ve Q value} \\ \hline C. \ ^3_1 H + ^2_1 H \rightarrow ^4_2 He + n & \text{III. Fission} \\ \hline D. \ ^1_1 H + ^3_1 H \rightarrow ^4_2 H + \gamma & \text{IV. Fusion with -ve Q value} \\ \hline \end{array} \]

Choose the correct answer from the options given below:

• A. A-II, B-I, C-III, D-IV
• B. A-III, B-I, C-II, D-IV
• C. A-II, B-I, C-IV, D-III
• D. A-III, B-I, C-IV, D-II

Hint:

Identify the type of reaction based on the reactants and products. Fission involves breaking a large nucleus into smaller ones, fusion involves combining smaller nuclei into a larger one, and chemical reactions involve changes in electron configuration.

Answer 1

The Correct Option is B

Match the reactions in LIST-I with their descriptions in LIST-II.

1. Reaction A: \(^{236}_{92} U \rightarrow ^{94}_{38} Sr + ^{140}_{54} Xe + 2n\)
   • This is a nuclear fission reaction, where a large nucleus splits into smaller fragments, producing neutrons and lighter nuclei. This corresponds to "III. Fission".
2. Reaction B: \(2H_2 + O_2 \rightarrow 2H_2O\)
   • This is a chemical reaction where hydrogen gas and oxygen gas combine to form water. This corresponds to "I. Chemical Reaction".
3. Reaction C: \(^3_1 H + ^2_1 H \rightarrow ^4_2 He + n\)
   • This is a nuclear fusion reaction with a positive Q value, producing helium and a neutron, with energy release. This corresponds to "II. Fusion with +ve Q value".
4. Reaction D: \(^1_1 H + ^3_1 H \rightarrow ^4_2 H + \gamma\)
   • This is a nuclear fusion reaction with a negative Q value, absorbing energy, indicated by gamma radiation \((\gamma)\). This corresponds to "IV. Fusion with -ve Q value".

The correct pairings of LIST-I with LIST-II are:

• A-III: Nuclear fission.
• B-I: Chemical reaction.
• C-II: Fusion reaction with a positive Q value.
• D-IV: Fusion reaction with a negative Q value.

The final answer is:

A-III, B-I, C-II, D-IV