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← JEE Main 2014 · 11 Apr · Shift 1
ChemistrySingle correct+4 / -1Question 51 of 90

JEE Main 2014 · 11 Apr · Shift 1, Chemistry question 51

The following reaction
CX6HX5OH+HCl+HCN→Anhyd ⋅ ZnClX2 2-hydroxybenzaldehyde (salicylaldehyde)\ce{C6H5OH + HCl + HCN ->[Anhyd. ZnCl2]}\ \text{2-hydroxybenzaldehyde (salicylaldehyde)}
is known as :

Phenol + HCl + HCN, with anhydrous ZnCl₂ over the arrow, gives salicylaldehyde (benzene ring with OH and CHO on adjacent carbons).
Choose one option
Answer and worked solution

Official answer: D

Formylating a phenol with HCN and HCl over anhydrous ZnClX2\ce{ZnCl2} is the Gattermann reaction. Gattermann-Koch uses CO/HCl.