Question
4.7 g of phenol is heated with Zn to give product X. If this reaction goes to 60\% completion then the number of moles of compound X formed will be _______ 10^ -2 . (Nearest Integer) (Given molar mass in g mol^ -1 : H:1, C:12, O:16)
JEE Main
Chemistry
Alcohols Phenols and Ethers
2026
JEE Main 2026 (06 April Shift 1)
JEE Main Chemistry Question (2026) — Solution
Options
- A. A
- B. B
- C. C
- D. D
Answer
A. A
Step-by-step solution
The chemical reaction of phenol with zinc dust is given by: C_6H_5OH + Zn C_6H_6 + ZnO Product X is benzene (C_6H_6). Molar mass of phenol (C_6H_5OH) = 6 12 + 6 1 + 16 = 94 g mol^ -1 Number of moles of phenol taken = 4.7 94 = 0.05 mol From the stoichiometry of the reaction, 1 mole of phenol produces 1 mole of benzene. Theoretical moles of X formed = 0.05 mol Since the reaction goes to 60\% completion, the actual moles of X formed is: 0.05 60 100 = 0.03 mol This can be written as 3 10^ -2 mol. Answer: 3
Related: Chemistry — Alcohols Phenols and Ethers · All PYQ Banks