Assertion : $C u {S O}_{4} \cdot 5 H_{2} O$ and $F e {S O}_{4} \cdot 7 H_{2} O$ are blue and green colour compounds respectively. Reason: Both compounds have their specific colour due to phenomenon of polarisation of anion.

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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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
$C u {S O}_{4} \cdot 5 H_{2} O$ contains $C u^{2 +}$ ion with $3 d^{9}$ electronic configuration and contains one unpaired electron.hence, it is blue in colour.
$F e {S O}_{4} \cdot 7 H_{2} O$ contains $F e^{2 +}$ ion and with $3 d^{6}$ electronic configuration and contains 4 unpaired electrons. Hence, it is green in colour.

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Assertion :CuSO4⋅5H2O and FeSO4⋅7H2O are blue and green colour compounds respectively. Reason: Both compounds have their specific colour due to phenomenon of polarisation of anion.

Assertion : $C u {S O}_{4} \cdot 5 H_{2} O$ and $F e {S O}_{4} \cdot 7 H_{2} O$ are blue and green colour compounds respectively. Reason: Both compounds have their specific colour due to phenomenon of polarisation of anion.