JEE Main 2021 · 18 March · morning · Single correct · +4 / −1
Match List - I with List - II
Choose the most appropriate answer from the options given below :
| List - I | List - II | ||
|---|---|---|---|
| (a) | Chlorophyll | (i) | Ruthenium |
| (b) | Vitamin-B₁₂ | (ii) | Platinum |
| (c) | Anticancer drug | (iii) | Cobalt |
| (d) | Grubbs catalyst | (iv) | Magnesium |
- (a) (a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)
- (b) (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
- (c) (a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
- (d) (a) - (iv), (b) - (ii), (c) - (iii), (d) - (i)
Answer and solution
Answer (b) (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
Solution
Chemistry ma’am · 2 steps
Link each compound to the one metal it is famous for, and the four matches fall into place.
- Match by metal. Each item in List I is a well-known complex built around one particular metal. Recall that metal and pick it from List II.
List I Central metal What to remember (a) Chlorophyll Magnesium (iv) Mg²⁺ sits at the centre of a porphyrin ring and helps the plant absorb light (b) Vitamin B₁₂ Cobalt (iii) Also called cyanocobalamin, with Co in a corrin ring (c) Anticancer drug Platinum (ii) Cisplatin, [Pt(NH₃)₂Cl₂] (the cis isomer), stops cancer cells from dividing (d) Grubbs catalyst Ruthenium (i) Ru carbene complex used for olefin metathesis - So. The matching is (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i), which is option (b).
The idea to keep. Learn these four as fixed pairs: chlorophyll with Mg, vitamin B₁₂ with Co, cisplatin with Pt, Grubbs catalyst with Ru. JEE asks them as matches again and again.
Answer from the NTA final answer key. Solution by PrepWiser.