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A solution of metal hydroxide (MOH) with...

A solution of metal hydroxide (MOH) with copper sulphate and mixed tartarate of metal M with another metal `M_(1)` off the same group, is used in the detection of -CHO group. Metal M and `M_(1)` are respectively:

A

Na , K

B

K,Rb

C

Na , Li

D

Rb, Na

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The correct Answer is:
A
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