✓ 2 MARKS
Derivations
🔥 APPEARED IN 3 BOARD SETS
(a) Write IUPAC names of the following coordination compounds :
(i) $[\text{Ag}(\text{NH}_3)_2] [\text{Ag}(\text{CN})_2]$
(ii) $\text{K}_3[\text{Fe}(\text{C}_2\text{O}_4)_3]$
OR
(b) (i) Give a chemical test to show that $[\text{Co}(\text{NH}_3)_5\text{SO}_4]\text{Cl}$ and $[\text{Co}(\text{NH}_3)_5\text{Cl}]\text{SO}_4$ are ionisation isomers.
(ii) What is meant by the ‘Chelate effect’ ? Give an example.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 56-1 | Set 1 | Question 19 |
| CBSE 2026 | Series 56-1 | Set 2 | Question 18 |
| CBSE 2026 | Series 56-1 | Set 3 | Question 19 |
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)