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Question

Assertion : ${[A l {(H_{2} O)}_{6}]}^{3 +}$ is stronger acid than ${[M g {(H_{2} O)}_{6}]}^{2 +}$ . Reason: Size of ${[A l {(H_{2} O)}_{6}]}^{3 +}$ is smaller than ${[M g {(H_{2} O)}_{6}]}^{2 +}$ and possesses more effective nuclear charge.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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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
Along a period, size decreases and oxidation no of metal increases. So ${[A l {(H_{2} O)}_{6}]}^{3 +}$ possess more effective nuclear charge due to smaller size of ${[A l {(H_{2} O)}_{6}]}^{3 +}$ and because of this it is the stronger acid.

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Similar questions

{[A l {(H_{2} O)}_{6}]}^{3 +}

{[M g {(H_{2} O)}_{6}]}^{2 +}

{[A l {(H_{2} O)}_{6}]}^{3 +}

{[M g {(H_{2} O)}_{6}]}^{2 +}

{[A l {(H_{2} O)}_{6}]}^{3 +}

{[M g {(H_{2} O)}_{6}]}^{2 +}

{[A l {(H_{2} O)}_{6}]}^{3 +}

{[A l {(H_{2} O)}_{6}]}^{3 +}

H_{2}

H e

(1 + \frac{P b}{R T})

H_{2}

H e

Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

{SiO}_{2}

{CaCO}_{3}

CaO

{CaCO}_{3}

{SiO}_{2}

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