Question 7
Which of the following is not true for fertilizers?

(a) They increase the yield.
(b) Their excessive use disturbs the balance of nutrients in soil.
(c) They are generally used in small quantity.
(d) They are environment friendly.

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Solution

(d) They are environment friendly.

Fertilizers are detrimental to the environment in excess. Unused fertilizers wash up along with the irrigation runoff and end up in water bodies leading to eutrophication of the water bodies resulting in killing of aquatic life.

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Q. Question 7
Which of the following is not true for fertilizers?

(a) They increase the yield.
(b) Their excessive use disturbs the balance of nutrients in soil.
(c) They are generally used in small quantity.
(d) They are environment friendly.

Question 8
Among the given options, which one is not correct for the use of a large amount of fertilisers and pesticides?

(a) They are eco-friendly
(b) They turn the fields barren after some time
(c) They adversely affect the useful component of the soil
(d) They destroy the soil fertility

Q. Question 8
Among the given options, which one is not correct for the use of large amount of fertilisers and pesticides?

(a) They are eco-friendly
(b) They turn the fields barren after some time
(c) They adversely affect the useful component from the soil
(d) They destroy the soil fertility

Choose the correct option for the following statements:

Statement A: Fertilizers are eco-friendly and safe to use.

Statement B: Fertilizers provide necessary nutrients and help in increasing the yield of the crops.

Assertion:- Plastics are not environment-friendly still, they are used. Choose the correct reason(s) for this assertion.

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Water Pollutants

Standard VIII Chemistry

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Question 7 Which of the following is not true for fertilizers? (a) They increase the yield. (b) Their excessive use disturbs the balance of nutrients in soil. (c) They are generally used in small quantity. (d) They are environment friendly.

(d) They are environment friendly. Fertilizers are detrimental to the environment in excess. Unused fertilizers wash up along with the irrigation runoff and end up in water bodies leading to eutrophication of the water bodies resulting in killing of aquatic life.

Question 7
Which of the following is not true for fertilizers?

(a) They increase the yield.
(b) Their excessive use disturbs the balance of nutrients in soil.
(c) They are generally used in small quantity.
(d) They are environment friendly.

(d) They are environment friendly.

Fertilizers are detrimental to the environment in excess. Unused fertilizers wash up along with the irrigation runoff and end up in water bodies leading to eutrophication of the water bodies resulting in killing of aquatic life.