Green vitriol is

Options

A. ferrous sulphate
B. tin oxide
C. zinc oxide
D. ferrous carbonate

Explanation

**Step-by-Step Solution:**

1. **Identify Green Vitriol**: Green vitriol is a common name for iron(II) sulfate, which is a chemical compound composed of iron, sulfur, and oxygen.

2. **Chemical Formula**: The chemical formula for iron(II) sulfate is FeSO₄. It consists of one iron (Fe) atom, one sulfur (S) atom, and four oxygen (O) atoms.

3. **Properties**: Green vitriol typically appears as a blue-green crystalline solid. It is soluble in water and has a variety of uses in different fields.

4. **Uses**: One of the primary uses of iron(II) sulfate is in the treatment of iron deficiency anemia. It is often prescribed as a dietary supplement to increase iron levels in the body.

5. **Other Applications**: In addition to its medicinal uses, iron(II) sulfate is also used in agriculture, as a coagulant in water treatment, and in the manufacturing of pigments.