✓ 3 MARKS
Short Answer
🔥 APPEARED IN 3 BOARD SETS
(a) Show the variation of binding energy per nucleon with mass number. Write the significance of the binding energy curve.
(b) Two nuclei with lower binding energy per nucleon form a nuclei with more binding energy per nucleon.
(i) What type of nuclear reaction is it ?
(ii) Whether the total mass of nuclei increases, decreases or remains unchanged ?
(iii) Does the process require energy or produce energy ?
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2025 | Series 55-2 | Set 1 | Question 27 |
| CBSE 2025 | Series 55-2 | Set 2 | Question 28 |
| CBSE 2025 | Series 55-2 | Set 3 | Question 23 |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- Step 1: Stating the fundamental formula / law statement (+1 Mark)
- Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
- Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)