NSO Level 1- Science Olympiad (SOF) Class 8: Questions 561 - 564 of 1076

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Passage

Deep took three pieces of clothes. He dipped one piece in petrol, another in water and left the third piece dry. Observe the pictures and answer the questions

Image of three Pieces of Clothes

Image of Three Pieces of Clothes

Question number: 561 (1 of 5 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

What will he observe when he try to ignite them?

Choices

Choice (4)Response

a.

Dry cloth burns at once, then the wet cloth and the cloth dipped in petrol takes time to start burning

b.

Wet cloth burns at once, then the dry cloth and the cloth dipped in petrol takes time to start burning

c.

Dry cloth burns at once, then the cloth dipped in petrol and the wet cloth takes time to start burning

d.

Cloth dipped in petrol burns at once, then the dry cloth and the wet cloth takes time to start burning

Question number: 562 (2 of 5 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

Which of the following is not an inflammable substance?

Choices

Choice (4)Response

a.

Oxygen

b.

LPG

c.

Diesel

d.

Petrol

Question number: 563 (3 of 5 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

Coal burns with

Choices

Choice (4)Response

a.

Only glow

b.

Flame

c.

Neither flame nor glow

d.

Flame and glow

Question number: 564 (4 of 5 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

He used the same cloth for his experiment but they didn’t burn together. The explanation is

Choices

Choice (4)Response

a.

An object starts combustion when it attains its ignition temperature.

b.

The ignition temperature of wet cloth is the lowest and petrol is the highest.

c.

The ignition temperature of petrol is the lowest and that of wet cloth is the highest.

d.

Both a. and c. are correct

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