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

(1) acetate (3) hydrogen sulfate

(2) hydrogen carbonate (4) oxalate

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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: 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.

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