Default Title

Question (11)

QN001251

Which change is desirable in daily life because it produces energy?

(A) Burning fuel in vehicles
(B) Rusting bicycle chains
(C) Spoiling milk
(D) Decay of fruits

Correct Answer: A

Explanation:

Burning fuel releases useful energy.

Link:

Report Error

Question (12)

QN001252

Which process changes milk into curd?

(A) Evaporation
(B) Condensation
(C) Fermentation
(D) Rusting

Correct Answer: C

Explanation:

Bacteria convert milk into curd through fermentation.

Link:

Report Error

Question (13)

QN001253

Formation of curd from milk is considered desirable because

(A) milk loses nutrients completely
(B) curd is useful as food
(C) curd becomes poisonous
(D) milk freezes permanently

Correct Answer: B

Explanation:

Curd is nutritious and edible.

Link:

Report Error

Question (14)

QN001254

Which of the following is an undesirable environmental change?

(A) Rainfall helping crops
(B) Pollution of rivers
(C) Growth of forests
(D) Compost formation

Correct Answer: B

Explanation:

River pollution harms living organisms and water quality.

Link:

Report Error

Question (15)

QN001255

Why is compost formation generally considered desirable?

(A) It destroys soil nutrients
(B) It produces harmful gases only
(C) It enriches soil fertility
(D) It prevents plant growth

Correct Answer: C

Explanation:

Compost adds nutrients to soil.

Link:

Report Error

Question (16)

QN001256

Which process below is harmful to stored grains?

(A) Drying grains in sunlight
(B) Germination
(C) Attack by insects and moisture
(D) Cleaning grains

Correct Answer: C

Explanation:

Insects and moisture spoil grains.

Link:

Report Error

Question (17)

QN001257

Which of the following changes is useful in food preparation?

(A) Burning food
(B) Fermentation of batter
(C) Spoiling vegetables
(D) Rusting utensils

Correct Answer: B

Explanation:

Fermentation makes batter soft and suitable for cooking.

Link:

Report Error

Question (18)

QN001258

Which of the following best represents an undesirable chemical change?

(A) Digestion of food
(B) Rusting of iron
(C) Cooking rice
(D) Photosynthesis

Correct Answer: B

Explanation:

Rusting damages iron objects.

Link:

Report Error

Question (19)

QN001259

Why do people refrigerate food items?

(A) To increase spoilage
(B) To prevent undesirable changes
(C) To burn bacteria instantly
(D) To convert food into gases

Correct Answer: B

Explanation:

Refrigeration slows spoilage.

Link:

Report Error

Question (20)

QN001260

Which process below is desirable because it supports plant growth?

(A) Soil erosion
(B) Seed germination
(C) Leaf burning
(D) Water pollution

Correct Answer: B

Explanation:

Germination leads to growth of new plants.

Link:

Report Error

Question (11)

Which change is desirable in daily life because it produces energy?

Explanation:

Link:

Question (12)

Which process changes milk into curd?

Explanation:

Link:

Question (13)

Formation of curd from milk is considered desirable because

Explanation:

Link:

Question (14)

Which of the following is an undesirable environmental change?

Explanation:

Link:

Question (15)

Why is compost formation generally considered desirable?

Explanation:

Link:

Question (16)

Which process below is harmful to stored grains?

Explanation:

Link:

Question (17)

Which of the following changes is useful in food preparation?

Explanation:

Link:

Question (18)

Which of the following best represents an undesirable chemical change?

Explanation:

Link:

Question (19)

Why do people refrigerate food items?

Explanation:

Link:

Question (20)

Which process below is desirable because it supports plant growth?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY