Question

Assertion: When copper oxide is heated in the presence of hydrogen, its colour changes from black to brown.
Reason: A substance is said to be oxidised If it gains oxygen during a reaction.

(a) Both A and r true and r is correct explanation of the assertion
(b) Both A and r true but r is not correct explanation of the assertion
(c) A is true but r is false
(d) A is false but r is true
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Answer 1

Answer:

option a

Explanation:

it is a redox reaction where the hydrogen gains oxygen and it's being oxidised.

Hope this helps u (◍•ᴗ•◍)❤

Answer 2

Explanation:

$a \: is \: the \: answer \: dear$