Question

Which polyatomic ion is found in the compound represented by the formula NaHCO3?

(1) acetate (3) hydrogen sulfate
(2) hydrogen carbonate (4) oxalate

Answer 1

The correct answer is option 2. Hydrogen carbonate is the polyatomic ion in the compound given. A polyatomic ion is a charged species composed of covalently bonded atoms. Hydrogen carbonate, also known as bicarbonate, is a polyatomic ion with the charge of -1.

Answer 2

Answer: The correct option is 2.

Explanation: Polyatomic ions are defined as the ions in which two or more elements are covalently bonded to act as a single unit. They always carry some charge.

Examples of polyatomic ions are:
`OH^-` known as hydroxide ion,
`SO_4^(2-)` known as sulfate ion

We are given a compound
`NaHCO_3` having 2 ions which are
`Na^+` and
`HCO_3^-`. these ions are named as sodium ions and hydrogen carbonate ions.

Therefore, the correct option is 2.