TN TET 2019 Paper 1

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Question : 127 of 150

Marks: +1, -0

Assertion (A): I am a Reddish brown metal, I react with air, my colour is changed to black formation of cupric oxide.
Reason (R) : I undergoes Reduction Reaction.

(A) is correct, (R) is correct reason.
(A) is correct, (R) is not a relevant answer.
(A) is correct (R) is wrong.
(A) and (R) are incorrect

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