Default Title

Question (1)

QN00801

A red ant bite causes a stinging sensation because the ant injects

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

Correct Answer: C

Explanation:

Red ants inject formic acid.

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Question (2)

QN00802

Which substance is applied on an ant bite to reduce pain?

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

Correct Answer: C

Explanation:

Moist baking soda neutralises the acid.

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Question (3)

QN00803

Baking soda relieves the effect of an ant bite because it is

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

Correct Answer: C

Explanation:

Baking soda is basic in nature.

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Question (4)

QN00804

The process by which baking soda reduces the effect of formic acid is called

(A) evaporation
(B) condensation
(C) neutralisation
(D) filtration

Correct Answer: C

Explanation:

Acid and base cancel each other’s effect.

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Question (5)

QN00805

A farmer notices poor plant growth due to excessive use of chemical fertilisers. The soil has most likely become

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

Correct Answer: C

Explanation:

Excess fertilisers can make soil acidic.

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Question (6)

QN00806

Which substance should be added to acidic soil to improve plant growth?

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

Correct Answer: B

Explanation:

Lime neutralises acidic soil.

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Question (7)

QN00807

Lime is added to acidic soil because lime is

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

Correct Answer: B

Explanation:

Bases neutralise acids.

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Question (8)

QN00808

If soil is basic in nature, which material may be added to neutralise it?

(A) Baking soda
(B) Soap solution
(C) Compost and manure
(D) Lime water

Correct Answer: C

Explanation:

Compost releases acids into soil.

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Question (9)

QN00809

Organic matter such as compost helps basic soil because it releases

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

Correct Answer: C

Explanation:

Organic matter releases acids.

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Question (10)

QN00810

A lake near an industrial area shows declining fish population because factory waste released into it may be

(A) neutral only
(B) acidic
(C) sweet
(D) oily only

Correct Answer: B

Explanation:

Acidic waste harms aquatic life.

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Question (1)

A red ant bite causes a stinging sensation because the ant injects

Explanation:

Link:

Question (2)

Which substance is applied on an ant bite to reduce pain?

Explanation:

Link:

Question (3)

Baking soda relieves the effect of an ant bite because it is

Explanation:

Link:

Question (4)

The process by which baking soda reduces the effect of formic acid is called

Explanation:

Link:

Question (5)

A farmer notices poor plant growth due to excessive use of chemical fertilisers. The soil has most likely become

Explanation:

Link:

Question (6)

Which substance should be added to acidic soil to improve plant growth?

Explanation:

Link:

Question (7)

Lime is added to acidic soil because lime is

Explanation:

Link:

Question (8)

If soil is basic in nature, which material may be added to neutralise it?

Explanation:

Link:

Question (9)

Organic matter such as compost helps basic soil because it releases

Explanation:

Link:

Question (10)

A lake near an industrial area shows declining fish population because factory waste released into it may be

Explanation:

Link:

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