Question

Following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A (c) A is true but R is false.
(d) A is false but R is true.

1) Assertion :- Carbon react with oxygen to form carbon dioxide.
Reason :- It is a exothermic reaction.​

Answer 1

Answer:

option (A)

Explanation:

combination reaction between oxygen and carbon forms carbon dioxide

Answer 2

Carbon reacts with oxygen to form carbon dioxide.  It is an exothermic reaction.​ Therefore, both A and R are true but R is not the correct explanation of A (c) A is true but R is false. Thus, the correct option is (b).

Explanation:

• When carbon is treated with oxygen, it forms carbon dioxide.
• In this reaction, two compounds combine together to form a new compound. Therefore, it is a combination reaction.

        $\[C + {O_2} \to C{O_2} + Heat\]$

• The reaction evolves a large amount of heat energy. Therefore, it is an exothermic reaction.
• Thus, both assertion and reason are correct statements but the reason is not the correct explanation of the assertion.
• The correct reason is that it is a combination reaction.