Multiple choice Which one of the follwoing processes is involved in the synthesis of potassium cyanide? Acheson's process Mac-Arthur forest cyanide process Castner's process Beilby's process None of these Reveal answer Fill a bubble to check yourself D Correct answer Explanation This option is correct because ammonia gas passed over the mixture of fused potassium carbonates and carbon to produce potassium cyanide, crystalline out by evaporation to obtain pure potassium cyanide.