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Which ion is the only negative ion present in an aqueous solution of an Arrhenius base?

(1) hydride ion (3) hydronium ion

(2) hydrogen ion (4) hydroxide ion

Verified Answer :

For Arrhenius,an acid is a substance that in aqueous solution, releases protons (cations or positive ions) and a base releases hydroxide (anions or negative ions)) in aqueous solution

Number 4

If you notice any mistake in my english, please let me know, because i am not native.

Answer : The correct option is, (4) hydroxide ion

Explanation :

According to the Arrhenius acid-base theory, an acid is a substance that ionizes in the aqueous solution to give hydronium ion or hydrogen ion \((H^+)\) and a bases is a substance that ionizes in the aqueous solution to give hydroxide ion \((OH^-)\).

As per question, hydroxide ion is the only negative ion present in an aqueous solution of an Arrhenius base and hydrogen or hydronium ion is the only positive ion present in an aqueous solution of an Arrhenius acid.

Hence, the correct option is, (4) hydroxide ion

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