Assertion : $C u {(O H)}_{2}$ is soluble in ${N H}_{4} O H$ but not in $N a O H$ . Reason: $C u {(O H)}_{2}$ forms a soluble complex with ${N H}_{3}$ .

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
$C u (O H)_{2}$ forms a complex with $N H_{4} O H$ whereas with $N a O H$ does not. So, it is soluble in ammonium hydroxide.

The complex formed is $[C u (N H_{3})_{4}] (O H)_{2}$ .

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Assertion :Cu(OH)2 is soluble in NH4OH but not in NaOH. Reason: Cu(OH)2 forms a soluble complex with NH3.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionCu(OH)2 forms a complex with NH4OH whereas with NaOH does not. So, it is soluble in ammonium hydroxide.The complex formed is [Cu(NH3)4](OH)2.

Assertion : $C u {(O H)}_{2}$ is soluble in ${N H}_{4} O H$ but not in $N a O H$ . Reason: $C u {(O H)}_{2}$ forms a soluble complex with ${N H}_{3}$ .

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
$C u (O H)_{2}$ forms a complex with $N H_{4} O H$ whereas with $N a O H$ does not. So, it is soluble in ammonium hydroxide.

The complex formed is $[C u (N H_{3})_{4}] (O H)_{2}$ .