What happens when:
(i) Ammonia reacts with formaldehyde
(ii) Acetic acid reacts with PCl5
What happens when:
(i) Ammonia reacts with formaldehyde
(ii) Acetic acid reacts with PCl5

(i) Urotropine is formed when ammonia reacts with formaldehyde.
6HCHO + 4NH3 → (CH2) 6N4 + 6H2O
(ii) Acetyl chloride is produced when acetic acid reacts with PCl5.
CH3COOH + PCl5 → CH3COCl + POCl3 + HCl