Question

Decomposition reactions
are the best examples of
a) endothermic reactions
b) exothermic reactions
c)isothermic reactions
d) none of the above​

Answer 1

Explanation:

(A)In electrolysis of water heat energy is used to convert water into hydrogen and oxygen.

2H

2

O→2H

2

+O

2

it is an endothermic reaction.

(B)conversion of limestone into quicklime can be done by heating limestone.

CaCO

3

→CaO+CO

2

it is an endothermic reaction.

(C)During respiration breakdown of glucose in presence of oxygen releases energy, therefore it is an exothermic process.

C

6

H

12

O

6

+6O

2

→6H

2

O+6CO

2

+energy

(D)In process of photosynthesis- light energy is used to convert carbon dioxide and water into glucose and oxygen

6CO

2

+6H

2

O→C

6

H

12

O

6

+6O

2

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Answer 2

Answer:

a) endothermic reactions