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Question (21)

QN00821

Excessive use of fertilisers can disturb soil health because it may change the soil into

(A) acidic soil
(B) rocky soil
(C) sandy soil
(D) wet soil

Correct Answer: A

Explanation:

Fertilisers may increase acidity.

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Question (22)

QN00822

Which of the following correctly matches the problem with its neutralising substance?

(A) Ant bite — vinegar
(B) Acidic soil — lime
(C) Basic soil — lime water
(D) Acidic waste — lemon juice

Correct Answer: B

Explanation:

Lime neutralises acidic soil.

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Question (23)

QN00823

Neutralisation is useful in environmental protection because it helps to

(A) increase pollution
(B) balance harmful acidic or basic effects
(C) remove oxygen from water
(D) dry water bodies

Correct Answer: B

Explanation:

Neutralisation balances harmful effects.

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Question (24)

QN00824

Which condition may occur if acidic industrial waste enters a lake untreated?

(A) Better fish growth
(B) Increase in soil fertility
(C) Decline in aquatic life
(D) Increase in drinking water sweetness

Correct Answer: C

Explanation:

Acidic water harms aquatic organisms.

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Question (25)

QN00825

A farmer adds compost to soil and notices improvement because the compost helps to

(A) neutralise excess base
(B) increase acidity only
(C) remove all minerals
(D) reduce sunlight

Correct Answer: A

Explanation:

Compost reduces basic nature of soil.

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Question (26)

QN00826

Which property of baking soda makes it useful in ant bites?

(A) Bitter taste
(B) Basic nature
(C) Sweet smell
(D) Red colour

Correct Answer: B

Explanation:

Baking soda is basic.

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Question (27)

QN00827

Which pair shows correct neutralisation use?

(A) Acidic soil — compost
(B) Basic soil — baking soda
(C) Ant bite — moist baking soda
(D) Acidic waste — vinegar

Correct Answer: C

Explanation:

Baking soda neutralises acid from ant bite.

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Question (28)

QN00828

Soil may remain unhealthy even if neutral in nature due to

(A) excess oxygen only
(B) deficiency of nutrients
(C) excess water only
(D) absence of sunlight only

Correct Answer: B

Explanation:

Nutrient deficiency affects plant growth.

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Question (29)

QN00829

A student says acidic waste should be released directly into rivers. Which statement best explains why this is wrong?

(A) It may harm aquatic organisms
(B) It improves water quality
(C) It increases fish food instantly
(D) It neutralises water naturally always

Correct Answer: A

Explanation:

Acidic waste damages aquatic life.

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Question (30)

QN00830

Which of the following substances is basic and used in neutralisation examples from daily life?

(A) Lemon juice
(B) Vinegar
(C) Baking soda
(D) Tamarind water

Correct Answer: C

Explanation:

Baking soda is basic.

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Question (21)

Excessive use of fertilisers can disturb soil health because it may change the soil into

Explanation:

Link:

Question (22)

Which of the following correctly matches the problem with its neutralising substance?

Explanation:

Link:

Question (23)

Neutralisation is useful in environmental protection because it helps to

Explanation:

Link:

Question (24)

Which condition may occur if acidic industrial waste enters a lake untreated?

Explanation:

Link:

Question (25)

A farmer adds compost to soil and notices improvement because the compost helps to

Explanation:

Link:

Question (26)

Which property of baking soda makes it useful in ant bites?

Explanation:

Link:

Question (27)

Which pair shows correct neutralisation use?

Explanation:

Link:

Question (28)

Soil may remain unhealthy even if neutral in nature due to

Explanation:

Link:

Question (29)

A student says acidic waste should be released directly into rivers. Which statement best explains why this is wrong?

Explanation:

Link:

Question (30)

Which of the following substances is basic and used in neutralisation examples from daily life?

Explanation:

Link:

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