NSO Level 1- Science Olympiad (SOF) Class 8: Questions 563 - 569 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

Image of three Pieces of Clothes

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

Question number: 565 (5 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: 566

» Combustion and Flame

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MCQ▾

Question

A sudden reaction with the evolution of heat, light and sound is called

Choices

Choice (4) Response

a.

Spontaneous combustion

b.

Rapid combustion

c.

Explosion

d.

Natural combustion

Question number: 567

» Metals and Non-Metals

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MCQ▾

Question

Metals are generally heavy in nature but this is a light metal.

Choices

Choice (4) Response

a.

Sodium

b.

Magnesium

c.

Potassium

d.

All a. , b. and c. are correct

Question number: 568

» Combustion and Flame

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MCQ▾

Question

This fuel has the highest calorific value

Choices

Choice (4) Response

a.

Kerosene

b.

Diesel

c.

Biogas

d.

Petrol

Question number: 569

» Reproduction in Animals

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MCQ▾

Question

Generally two parents are involved in the process of reproduction in animal kingdom. Rarely in some cases, only is a single parent involved. Pick out the examples of single parent reproduction from the given list.

Choices

Choice (4) Response

a.

Budding

b.

Binary fission

c.

Cloning

d.

Both a. and b. are correct

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