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

Let's examine the types of reactions listed in LIST-I and match them with their corresponding descriptions in LIST-II.

1. Reaction A: \(^{236}_{92} U \rightarrow ^{94}_{38} Sr + ^{140}_{54} Xe + 2n\)
   • This is a nuclear fission reaction. It involves the splitting of a large nucleus into smaller fragments, usually producing free neutrons and lighter nuclei. This matches with "III. Fission".
2. Reaction B: \(2H_2 + O_2 \rightarrow 2H_2O\)
   • This is a chemical reaction where hydrogen gas reacts with oxygen gas to form water. This matches with "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. Helium is produced along with a neutron, releasing energy. This matches with "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 but has a negative Q value because it absorbs energy, indicated via gamma radiation \((\gamma)\). This matches with "IV. Fusion with -ve Q value".

Thus, the correct matching from LIST-I with LIST-II is as follows:

• A-III: The reaction is a nuclear fission process.
• B-I: The reaction is a chemical reaction.
• C-II: The reaction is a fusion reaction with a positive Q value.
• D-IV: The reaction is a fusion reaction with a negative Q value.

Therefore, the correct answer is:

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

Answer 2

• A (Uranium decay): This is a fission reaction, where a heavy nucleus splits into lighter nuclei and neutrons. So, A matches with III.
• D (Fusion): In Fusion when Q value is negative, energy is needed to carry it out, like nuclear reactors. So, D matches with IV.
• C (Fusion): In Fusion when Q value is positive, energy is released which can be harnessed for power. So, C matches with II.
• B (Hydrogen and Oxygen reaction): This is a chemical reaction. So, B matches with I.

Therefore, the correct matches are:
A - III
B - I
C - II
D - IV