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Question (31)

QN00831

Which example best represents “Bridging Science and Society”?

(A) Neutralising factory waste before releasing into lakes
(B) Drawing diagrams in notebook
(C) Reading science chapter silently
(D) Collecting stamps

Correct Answer: A

Explanation:

It protects the environment and society.

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Question (32)

QN00832

Farmers use lime in fields mainly to

(A) increase soil acidity
(B) neutralise acidic soil
(C) remove water from soil
(D) increase sand content

Correct Answer: B

Explanation:

Lime balances acidic soil.

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Question (33)

QN00833

Which condition is most suitable for healthy plant growth?

(A) Extremely acidic soil
(B) Extremely basic soil
(C) Balanced soil nature
(D) Completely dry soil

Correct Answer: C

Explanation:

Balanced soil supports plant growth.

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Question (34)

QN00834

A student mixes acidic industrial waste with a suitable base. The process demonstrates

(A) filtration
(B) crystallisation
(C) neutralisation
(D) sedimentation

Correct Answer: C

Explanation:

Acid and base neutralise each other.

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Question (35)

QN00835

Which of the following situations requires adding an acidic substance?

(A) Ant bite treatment
(B) Acidic soil treatment
(C) Basic soil treatment
(D) Neutral water treatment

Correct Answer: C

Explanation:

Acids help neutralise bases.

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Question (36)

QN00836

Why is moist baking soda preferred over dry baking soda for ant bites?

(A) Moist baking soda spreads easily on skin
(B) Dry baking soda becomes acidic
(C) Moist baking soda changes into salt
(D) Dry baking soda releases gas immediately

Correct Answer: A

Explanation:

Moist baking soda can be applied easily.

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Question (37)

QN00837

A farmer added too much compost repeatedly. Which change may occur in the soil after long use?

(A) Soil may become acidic
(B) Soil may become metallic
(C) Soil may become neutral permanently
(D) Soil may become colourless

Correct Answer: A

Explanation:

Excess compost can increase acidity.

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Question (38)

QN00838

Which of the following is a social benefit of neutralising industrial waste?

(A) Protection of water bodies
(B) Increase in factory smoke
(C) Faster evaporation of lakes
(D) Reduction of rainfall

Correct Answer: A

Explanation:

Neutralisation protects the environment.

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Question (39)

QN00839

The main aim of neutralisation in daily life is to

(A) increase harmful effects
(B) balance acidic or basic nature
(C) remove all salts
(D) produce gases only

Correct Answer: B

Explanation:

Neutralisation balances acids and bases.

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Question (40)

QN00840

Which statement correctly explains neutralisation in daily life?

(A) Acids always increase acidity
(B) Bases always increase basicity
(C) Acids and bases can reduce each other’s harmful effects
(D) Neutral substances react only with water

Correct Answer: C

Explanation:

Neutralisation reduces harmful effects of acids and bases.

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Question (31)

Which example best represents “Bridging Science and Society”?

Explanation:

Link:

Question (32)

Farmers use lime in fields mainly to

Explanation:

Link:

Question (33)

Which condition is most suitable for healthy plant growth?

Explanation:

Link:

Question (34)

A student mixes acidic industrial waste with a suitable base. The process demonstrates

Explanation:

Link:

Question (35)

Which of the following situations requires adding an acidic substance?

Explanation:

Link:

Question (36)

Why is moist baking soda preferred over dry baking soda for ant bites?

Explanation:

Link:

Question (37)

A farmer added too much compost repeatedly. Which change may occur in the soil after long use?

Explanation:

Link:

Question (38)

Which of the following is a social benefit of neutralising industrial waste?

Explanation:

Link:

Question (39)

The main aim of neutralisation in daily life is to

Explanation:

Link:

Question (40)

Which statement correctly explains neutralisation in daily life?

Explanation:

Link:

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