Question

Green vitriol is chemically known as

• A. Copper sulphate
• B. Zinc sulphate
• C. Ferrous sulphate
• D. Ferric chloride

Hint:

Green vitriol is ferrous sulphate, blue vitriol is copper sulphate, and white vitriol is zinc sulphate.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Many inorganic chemicals are known by traditional or "trivial" names that reflect their appearance or historical use. "Vitriols" are generally sulfates of certain metals.
Step 2: Detailed Explanation:
1. Ferrous Sulphate: \(FeSO_4 \cdot 7H_2O\) is known as Green Vitriol due to its pale green crystalline appearance. It is commonly used as a hematinic to treat iron-deficiency anemia.
2. Copper Sulphate: \(CuSO_4 \cdot 5H_2O\) is known as Blue Vitriol.
3. Zinc Sulphate: \(ZnSO_4 \cdot 7H_2O\) is known as White Vitriol.
4. Ferric Chloride: Is used as a reagent and styptic but is not referred to as a vitriol.
Step 3: Final Answer:
The common name for ferrous sulphate heptahydrate is Green Vitriol.