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Answer (4)
Answer:The correct answer is option 4. ;
The correct compounds classified as Arrhenius acids are (4) H B r and H 2 S O 4 .
An Arrhenius acid is a substance that raises the level of H + ions in aqueous solution. In the given options, we need to identify compounds that fit this definition.
H Cl and N a O H
H Cl is an Arrhenius acid, but N a O H is an Arrhenius base as it increases concentration of O H − ion in solution on dissociating
H NO 3 and N a Cl
H NO 3 is an Arrhenius acid, but N a Cl is a salt, not an acid.
N H 3 and H 2 C O 3
N H 3 is a base, and H 2 C O 3 is a weak acid. Only the latter one fits the definition of an Arrhenius acid.
H B r and H 2 S O 4
Both H B r and H 2 S O 4 are Arrhenius acids, as they increase the concentration of H + ions in solution on dissociating
The correct answer is option D: HBr and H₂SO₄, as both compounds release hydrogen ions (H⁺) in aqueous solutions, fitting the definition of Arrhenius acids. HCl, HNO₃, and H₂CO₃ also exhibit acid properties, but not all listed compounds qualify as Arrhenius acids. Understanding the behavior of these acids helps in identifying their classification based on their dissociation in water.
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