Consider the following pairs:

  1. Red vitriol→ Cobalt(II) sulphate heptahydrate
  2. Black vitriol→ Aluminium sulphate
  3. Vitriol of Mars→  Iron(III) sulphate 

    Which of the above is/are correct?

Answer: [A] 1 & 3 Only

Black vitriol is a mixture of iron (II) sulphate and iron sulphide. Other two pairs are correct.

This question is a part of GKToday's Integrated IAS General Studies Module