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Question

Assertion :It is difficult to distinguish the strengths of the strong acids such as HCl,H2SO4,HNO3,HBr or HClO4 in dilute aqueous solutions. Reason: In dilute aqueous solution all strong acids donate a proton to water and are essentially 100 % ionised to produce a solution all strong acids

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
All are strong acids (α=1) ( Levelling effect),

The strength of all the acids becomes equal to that of H3O+ ion is called leveling effect of the solvent, water, and here water is called a leveling solvent for all these acids.

Option A is correct.

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