Question

Which reaction does yield a colloidal solution?

विकल्प

• \[\ce{Cu + HgCl2 -> CuCl2 + Hg}\]

• \[\ce{2HNO3 + 3H2S -> 3S + 4H2O + 2NO}\]

• \[\ce{2Mg + CO2 -> 2MgO + C}\]

• \[\ce{Cu + CuCl2 -> CuCl2}\]

Answer 1

\[\ce{2HNO3 + 3H2S -> 3S + 4H2O + 2NO}\]

Explanation:

This reaction yields colloidal sulphur, forming a colloidal solution because sulphur particles are finely dispersed in the medium. Other reactions produce precipitates or compounds but not colloidal solutions.