Fatal dose of KCN is ?: (A) 50 - 60 mg, (B) 120 -130 mg, (C) 180 -190 mg, (D) 280 - 300 mg
Answer is D. Ans. is 'd' i.e., 280 - 300 mg Fatal dose of hydrocyanic acid in the pure form is 50 - 60 mg while as sodium or potassium cyanide is 200 - 300 mg.