Question

Which compound is an Arrhenius acid?
(1) H2SO4 (3) NaOH
(2) KCl (4) NH3

Answer 1

According to Arrhenius Theory of acids and bases, an Arrhenius acid produces H+ when dissolved in water.

Among the four options, (1) H2SO4 is the correct one because when it dissolves in water, it liberates H+.

Hope this is helpful~

Answer 2

Answer: Option (1) is the correct answer.

Explanation:

An Arrhenius acid is defined as the acid which dissociates in water to give hydrogen or $H^{+}$ ions.

For example, $H_{2}SO_{4} \rightarrow 2H^{+} + SO^{2-}_{4}$

So, $H_{2}SO_{4}$ is an Arrhenius acid as it is giving hydrogen ions upon dissociation.

Whereas a compound which dissociates in water to give hydroxide or $OH^{-}$ ions is known as Arrhenius base.

For example, $NaOH \rightarrow Na^{+} + OH^{-}$

So, NaOH is an Arrhenius base as it gives hydroxide ions upon dissociation.

Thus, we can conclude that out of the given options the compound $H_{2}SO_{4}$ is an Arrhenius acid.