Question

Which of the following chemicals are used to manufacture methyl isocyanate that caused “Bhopal Tragedy”

(i) Methylamine (ii) Phosgene

(iii) Phosphine (iv) Dimethylamine

• A. (i) and (iii)
• B. (iii) and (iv)
• C. (i) and (ii)
• D. (ii) and (iv)

Answer 1

Answer: (C)

(i) and (ii)

Answer 2

Methyl isocyanate is industrially prepared by the action of methyl amine with phosgene.

CH₃NH₂ + COCl₂ $\overset{\quad - HCl\quad}{\rightarrow}$ [CH₃NH – CO – Cl]

$\underset{- HCl}{\overset{\quad\Delta\quad}{\rightarrow}}$CH₃ – N = C = O methyl isosinide