What is untrue for bleaching powder?
- AIt is more soluble in water
- BIt is powder of light yellow colour
- CIt is an oxidant
- DIt releases chlorine after reaction with dilute acid
Show answer and explanation
Correct answer: (a) It is more soluble in water
Explanation
Bleaching powder (calcium oxychloride, CaOCl₂) is a pale yellowish-white powder that smells of chlorine. It is a strong oxidising agent, and with dilute acids it gives off chlorine:
CaOCl₂ + H₂SO₄ → CaSO₄ + H₂O + Cl₂
It is only partly soluble in water, so the statement that it is "more soluble" is untrue.