Question

Green vitriol is:

• A. $CuS{O}_4$
• B. $CuS{O}_4.7H_{2}O$
• C. $CuS{O}_4.5H_{2}O$
• D. $FeS{O}_4.7H_{2}O$

Answer 1

Answer: (D)

$FeS{O}_4.7H_{2}O$

Ferrous sulphate or iron(II) sulphate is most commonly encountered as the blue-green heptahydrate, known since ancient times as copperas or green vitriol.

Ferrous sulfate can be found in various states of hydration, and several of these forms exist in nature.

The formula is $FeS{O}_4.7H_{2}O$

It occurs in nature as copperas. It is commonly known as Hara Kasis.

Hence, option $D$ is correct.