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Question

Assertion :Size of the hydrated ion is in order Li+>Na+>K+>Rb+Cs+ which is just reverse of ionic size Reason: Greater the charge or charge density, smaller the ionic size, greater the hydration hence, greater the size of the hydrated ion.

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
Size of the hydrated ion is in order Li+>Na+>K+>Rb+Cs+ which is just reverse of ionic size.Greater the charge or charge density, smaller the ionic size, greater the hydration hence, greater the size of the hydrated ion.
So Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Hence option A is correct.

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