Rosenmund Reduction: The Rosenmund reduction is a reaction where acid chlorides are converted into aldehydes by employing hydrogen gas over palladium poisoned by barium sulfate.
Hoffmann Bromamide reaction
Clemmenson reduction
JEE Main 2021 — Chemistry Organic Chemistry
2021mcqmedium
Match List - I with List - II.
| List-I (Salt) | List-II (Flame colour wavelength) | ||
| (a) |  | (i) | Br2/NaOH |
| (b) |  | (ii) | H2/Pd−BaSO4 |
| (c) |  | (iii) | Zn(Hg)/Conc.HCl |
| (d) |  | (iv) | Cl2/RedP,H2O |
Official previous-year question
Held on 24 Feb 2021 · Verified 6 Jul 2026.
Options
- A
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
- B
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
- C
(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
- D
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
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