Question

please rply my question.......

4.State some of the irreversible biological changes that take place in nature.

5.Give one example of a physical change in which (i) energy is given out
(ii) energy is absorbed.​

Answer 1

Answer:

Ans 4: Examples of the irreversible reactions that take place in nature:

1. Photosynthesis. 12H2O + 6CO2→ C6H12O6 + 6O2 + 6H2O.

2. Biodegradation of matter.

3. Cellular respiration. C6H12O6 + 6O2 → 6CO2 + 6H2O + energy.

4.Germination of seeds.

5. Flowering of bud.

6. Bio gas production from cow dung.

Ans 5: 1 Energy is given out- burning of candle

           2 Energy is absorbed- melting of ice

Explanation:                      

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Answer 2

Answer:

Ans.4) Germination of seeds & Bio gas production from cow dung.

Ans.5) Energy is given out-  Burning of candle. Energy is absorbed- melting of ice.

Explanation:

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