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.
Assertion (A) : Decomposition of vegetable matter into compost is an example of exothermic reactions.
Reason (R) : Exothermic reaction are those reactions in which heat is evolved.
Answers
Answer:
(c) A is true but R is false
Explanation:
Assertion : Decomposition of vegetable matter into compost is an example of exothermic reactions.
Very much true! The decomposition of vegetable matter into compost is considered an exothermic reaction.
Correct Explanation: This decomposition process, which is carried out by microbes, requires energy to break down of bonds of vegetables, and exothermic reactions release energy in the form of heat or light. In this case, light energy is evolved.
Reason: Exothermic reaction are those reactions in which heat is evolved.
Somewhat True, but lets not live in the shallows of this statement!
Exothermic reactions refer to the reactions in which energy is released, either in heat or light. In the given statement(R), Light energy is completely skipped out, so thats what makes it false.
Hope this helps!
Both Assertion and Reason are true but the reason is not the correct explanation of assertion. (OPTION B)
Explanation
DECOMPOSITION REACTION -
- A chemical reaction in which a reactant breaks down into one or more products.
- The reactions can be exothermic or endothermic in nature.
- A decomposition reaction is the converse of a combination reaction.
- The exothermic reaction involves the release of energy whereas, in an endothermic reaction, energy is absorbed.
- Decomposition reaction can be facilitated by thermal, electric current, and by sunlight.
- The decomposition of compost involves the release of energy and is exothermic in nature.
- In the decomposition of organic matter-energy is required to break bonds therefore, energy is released in the form of light.