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Question (11)

QN00771

A red ant bite causes pain because the ant injects

(A) a base
(B) formic acid
(C) salt water
(D) sugar solution

Correct Answer: B

Explanation:

Ant bites inject formic acid.

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Question (12)

QN00772

Moist baking soda relieves ant bite pain because baking soda is

(A) acidic
(B) basic
(C) neutral
(D) salty

Correct Answer: B

Explanation:

Baking soda is a base.

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Question (13)

QN00773

The effect of acid injected by an ant can be reduced by applying

(A) lemon juice
(B) vinegar
(C) baking soda paste
(D) tamarind water

Correct Answer: C

Explanation:

Baking soda neutralises the acid.

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Question (14)

QN00774

A farmer notices poor plant growth due to acidic soil. Which substance should be added to improve the soil?

(A) Vinegar
(B) Lime
(C) Lemon juice
(D) Tamarind water

Correct Answer: B

Explanation:

Lime neutralises acidic soil.

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Question (15)

QN00775

Excessive use of chemical fertilisers may make soil

(A) basic
(B) neutral
(C) acidic
(D) colourless

Correct Answer: C

Explanation:

Chemical fertilisers can increase soil acidity.

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Question (16)

QN00776

If soil becomes basic, farmers may add compost because compost releases

(A) salts
(B) bases
(C) acids
(D) gases

Correct Answer: C

Explanation:

Organic matter releases acids.

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Question (17)

QN00777

Which situation is an example of neutralisation in daily life?

(A) Drying wet clothes
(B) Applying baking soda on ant bite
(C) Melting ice
(D) Dissolving sugar in water

Correct Answer: B

Explanation:

Baking soda neutralises the acid from ant bite.

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Question (18)

QN00778

Fish in a lake were dying due to acidic factory waste. Which method can help save the fish?

(A) Adding more acidic waste
(B) Adding basic substances to the waste
(C) Heating the lake water
(D) Removing all fish from the lake

Correct Answer: B

Explanation:

Bases neutralise acidic waste.

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Question (19)

QN00779

Industrial waste should be neutralised before release because acidic waste can

(A) improve fish growth
(B) damage aquatic life
(C) increase oxygen instantly
(D) make water sweet

Correct Answer: B

Explanation:

Acidic waste harms aquatic organisms.

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Question (20)

QN00780

In the experiment with lemon juice and lime water, blue litmus solution first turns red because lemon juice is

(A) neutral
(B) basic
(C) acidic
(D) salty

Correct Answer: C

Explanation:

Acidic substances turn blue litmus red.

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Question (11)

A red ant bite causes pain because the ant injects

Explanation:

Link:

Question (12)

Moist baking soda relieves ant bite pain because baking soda is

Explanation:

Link:

Question (13)

The effect of acid injected by an ant can be reduced by applying

Explanation:

Link:

Question (14)

A farmer notices poor plant growth due to acidic soil. Which substance should be added to improve the soil?

Explanation:

Link:

Question (15)

Excessive use of chemical fertilisers may make soil

Explanation:

Link:

Question (16)

If soil becomes basic, farmers may add compost because compost releases

Explanation:

Link:

Question (17)

Which situation is an example of neutralisation in daily life?

Explanation:

Link:

Question (18)

Fish in a lake were dying due to acidic factory waste. Which method can help save the fish?

Explanation:

Link:

Question (19)

Industrial waste should be neutralised before release because acidic waste can

Explanation:

Link:

Question (20)

In the experiment with lemon juice and lime water, blue litmus solution first turns red because lemon juice is

Explanation:

Link:

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