MCQ
The above reaction is know as :-


- AStephen reaction
- ✓Rosenmund reduction
- CClemmensen's reaction
- DRiemer-Tiemann reaction

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| Pressue $(mm\, Hg)$ | $50$ | $100$ | $200$ |
| Half-life period $(hrs.)$ | $3.52$ | $1.76$ | $0.88$ |
What will be the pressure when the half-life period is $2.5$ hours
