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Question

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

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
Cu(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.

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