Question

Which of the following is a Monovalent polyatomic anion *

1. Ammonium
2. Sulphate
3. Carbonate
4. Nitrate

Answer 1

Answer:

1. ammonium is the answer

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Answer 2

Answer:

The correct answer is (D) Nitrate.

Nitrate $\bold{(NO_{3}^-)}$ is a Monovalent Polyatomic Anion.

Explanation:

A single element containing a negative valency $(\minus-1)$ is called a monovalent anion. The covalently bonded entity of these monovalent atoms/elements are called polyatomic ions.

From the above, Nitrate $\bold{(NO_{3}^-)}$ contains three oxygen atoms and one nitrogen atom carrying an overall charge $(\minus-1)$. Loss of a proton from Nitric acid results in the formation of Nitrate.

Here, Nitrate is the only Monovalent Polyatomic Anion.