Question

Arsine gas is carried and comes in to contact with__in produces a yellow stain or Brown stain
a) mercuric chloride
b) calcium &galciate
c) magnesium & chloride
d) potassium permagnet​

Answer 1

magnesium and chloride it is the answer

Answer 2

The correct option to the above question is (a), which is mercuric chloride.

• Arsine gas is carried and comes into contact with mercuric chloride in produces a yellow stain or Brown stain due to the formation of mercuric arsenic in the chemical reaction.
• The following is the reaction that took place - 2AsH₃ + HgCl₂ →Hg(AsH₂)₂  + 2HCl

• This Hg(AsH₂)₂ produces a yellow stain.
• The test of arsenic which is a toxic component in medicinal substances is based on the fact that arsenic in the arsenic state can be readily reduced to arsine (AsH₃) gas which passes over mercuric chloride paper develops a yellow to brown stain.