Question

When arsenic sulphide is boiled with NaOH, sodium arsenite and sodium thioarsenite are formed according to reaction :

x As2S3+ y NaOH$\longrightarrow$ x Na3AsO3 + x Na3AsS3 + H2O. What are the values of x and y?

• A. 1, 6
• B. 2, 8
• C. 2, 6
• D. 1, 4

Answer 1

Answer: (A)

1, 6

Answer 2

(1)

On balancing Na atoms on both sides of reaction, we get :

y = 6x.

$\therefore$ x : y = 1 : 6 (only A option matches).