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Question (31)

QN0034412

A compost pit contains 64 kg of biodegradable waste. If half decomposes, how much remains?

(A) 16 kg
(B) 24 kg
(C) 32 kg
(D) 48 kg

Correct Answer: C

Explanation:

Half of 64 is 32 kg.

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Question (32)

QN0034413

Which of the following contributes directly to nutrient recycling?

(A) Decomposition
(B) Evaporation
(C) Condensation
(D) Reflection

Correct Answer: A

Explanation:

Decomposition recycles nutrients.

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Question (33)

QN0034414

A village generates 300 kg of organic waste. If 240 kg is composted, what fraction is composted?

(A) 2/3
(B) 3/4
(C) 4/5
(D) 5/6

Correct Answer: C

Explanation:

240/300 = 4/5.

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Question (34)

QN0034415

Which waste is best classified as organic waste?

(A) Plastic packet
(B) Metal can
(C) Vegetable scraps
(D) Glass bottle

Correct Answer: C

Explanation:

Vegetable scraps are organic and biodegradable.

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Question (35)

QN0034416

If 54 kg of compost is produced from three equal piles of waste, how much compost comes from each pile?

(A) 12 kg
(B) 15 kg
(C) 18 kg
(D) 20 kg

Correct Answer: C

Explanation:

54 ÷ 3 = 18 kg.

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Question (36)

QN0034417

Which factor is essential for microorganisms to decompose waste efficiently?

(A) Suitable moisture
(B) Bright light only
(C) Plastic covering only
(D) Cold temperature only

Correct Answer: A

Explanation:

Moisture supports microbial activity.

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Question (37)

QN0034418

A compost bin receives 25 kg, 35 kg, and 40 kg of biodegradable waste on three days. What is the total waste added?

(A) 90 kg
(B) 95 kg
(C) 100 kg
(D) 105 kg

Correct Answer: C

Explanation:

25 + 35 + 40 = 100 kg.

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Question (38)

QN0034419

Which practice helps reduce the amount of biodegradable waste sent to landfills?

(A) Composting
(B) Burning plastic
(C) Dumping waste in rivers
(D) Burying glass bottles

Correct Answer: A

Explanation:

Composting converts waste into useful manure.

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Question (39)

QN0034420

If 120 kg of biodegradable waste is divided equally among 6 compost pits, how much waste goes into each pit?

(A) 15 kg
(B) 20 kg
(C) 25 kg
(D) 30 kg

Correct Answer: B

Explanation:

120 ÷ 6 = 20 kg.

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Question (40)

QN0034421

Why does nature usually not get overwhelmed by dead plants and animals?

(A) They disappear automatically.
(B) Decomposers continuously break them down and recycle nutrients.
(C) Wind carries them away permanently.
(D) Soil absorbs them instantly without change.

Correct Answer: B

Explanation:

Decomposers recycle dead matter and nutrients.

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Question (31)

A compost pit contains 64 kg of biodegradable waste. If half decomposes, how much remains?

Explanation:

Link:

Question (32)

Which of the following contributes directly to nutrient recycling?

Explanation:

Link:

Question (33)

A village generates 300 kg of organic waste. If 240 kg is composted, what fraction is composted?

Explanation:

Link:

Question (34)

Which waste is best classified as organic waste?

Explanation:

Link:

Question (35)

If 54 kg of compost is produced from three equal piles of waste, how much compost comes from each pile?

Explanation:

Link:

Question (36)

Which factor is essential for microorganisms to decompose waste efficiently?

Explanation:

Link:

Question (37)

A compost bin receives 25 kg, 35 kg, and 40 kg of biodegradable waste on three days. What is the total waste added?

Explanation:

Link:

Question (38)

Which practice helps reduce the amount of biodegradable waste sent to landfills?

Explanation:

Link:

Question (39)

If 120 kg of biodegradable waste is divided equally among 6 compost pits, how much waste goes into each pit?

Explanation:

Link:

Question (40)

Why does nature usually not get overwhelmed by dead plants and animals?

Explanation:

Link:

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