NSO Level 1- Science Olympiad (SOF) Class 8: Questions 595 - 600 of 1076

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Question number: 595

» Combustion and Flame

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MCQ▾

Question

Burning hydrocarbon fuels in the absence of enough air may cause adverse effect. The reason behind this statement is

Choices

Choice (4) Response

a.

Carbon monoxide is a poisonous gas.

b.

Hydrocarbons burn in sufficient oxygen to produce carbon dioxide and water.

c.

Hydrocarbons burn in insufficient oxygen to form carbon monoxide.

d.

Both a. and c. are correct

Question number: 596

» Reproduction in Animals

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MCQ▾

Question

Number of sperms produced by testes at a time is

Choices

Choice (4) Response

a.

100 to 1000

b.

40 million to 1.2 billion

c.

10000 to 100000

d.

1

Question number: 597

» Combustion and Flame

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MCQ▾

Question

Burning a substance in air producing heat is called

Choices

Choice (4) Response

a.

Bursting

b.

Fire

c.

Digestion

d.

Combustion

Question number: 598

» Reproduction in Animals

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MCQ▾

Question

Reproduction by the union of male and female gametes is called

Choices

Choice (4) Response

a.

Vegetative reproduction

b.

Asexual reproduction

c.

Sexual reproduction

d.

None of the above

Passage

Study the pictures carefully and answer the question

Image of safety Matchstick

Image of Safety Matchstick

Image of safety Matchstick

Question number: 599 (1 of 6 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

The sides of the match box contain red phosphorus, glue and glass powder. The role of phosphorus is

Choices

Choice (4) Response

a.

It is the fuel for combustion

b.

It ignites the fuel

c.

It acts an oxidiser

d.

It gives necessary friction for combustion

Question number: 600 (2 of 6 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

The head of the safety match sticks contain

Choices

Choice (4) Response

a.

Potassium chlorate

b.

Sulphur

c.

Both a. and b. are correct

d.

None of the above

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