Give a balanced equation for the conversion of zinc oxide to zinc sulphate.

Select from A, B, C –

A: Sodium hydroxide solution.

B: A weak acid.

C: Dilute sulphuric acid.

The solution which liberates sulphur dioxide gas, from sodium sulphite.

Choose the correct answer from the choices:

The gas evolved when dil. sulphuric acid reacts with iron sulphide.

A: Hydrogen sulphide
B: Sulphur dioxide
C: Sulphur trioxide
D: Vapour of sulphuric acid.

Give a balanced equation for – Dilute sulphuric acid is poured over sodium sulphite