A white solid forms Rinmann's green in the charcoal cavity test in an oxidising flame. On treatment with dilute H2SO4, this solid produces a gas that turns an acidified dichromate paper green and lead

Question

A white solid forms Rinmann's green in the charcoal cavity test in an oxidising flame. On treatment with dilute H2SO4, this solid produces a gas that turns an acidified dichromate paper green and lead acetate paper black. The white solid is:

Prashant Kotian · Accepted Answer

Correct answer: C. Rinmann's green indicates Zn. Gas turning dichromate green (by reduction to Cr3+) and lead acetate black (PbS) is H2S, confirming a sulphide. Hence, ZnS.

💡 Solution & Explanation

Practice 22,000+ questions like this