A colourless gas with a pungent smell is evolved when dilute hydrochloric acid is added to a sample of a salt. The gas evolved could turn

A colourless gas with a pungent smell is evolved when dilute hydrochloric acid is added to a sample of a salt. The gas evolved could turn

A acidified K\(_{2}\)Cr\(_{2}\)O\(_{7}\) solution colourless
B acidified KMnO\(_{4}\) solution colourless
C Fe(NO\(_{3}\))\(_{2}\) solution green
D Pb(NO\(_{3}\))\(_{2}\) paper black

waec 2022 chemistry

The correct answer is B. acidified KMnO\(_{4}\) solution colourless

If the potassium manganate(VII) solution is acidified with dilute sulfuric acid, the purple solution becomes colourless.

Previous question Next question