NSO Level 1- Science Olympiad (SOF) Class 8: Questions 577 - 580 of 1076

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Question number: 577

» Combustion and Flame

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MCQ▾

Question

When a fuel burns rapidly and produces heat and light, it is called

Choices

Choice (4) Response

a.

Explosion

b.

Rapid combustion

c.

Spontaneous combustion

d.

Natural combustion

Question number: 578

» Metals and Non-Metals

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MCQ▾

Question

Some chemical properties of metals and non-metals are given here. Arrange them properly.

  1. react with oxygen to form oxides which are acidic or neutral in nature

  2. do not react with water

  3. react with acids to form hydrogen gas

  4. react with sodium hydroxide to produce hydrogen gas

Choices

Choice (4) Response

a.

1 and 4 metals, 2 and 3 non-metals

b.

1 and 2 metals, 3 and 4 non-metals

c.

1 and 2 non-metals, 3 and 4 metals

d.

1 and 3 metals, 2 and 4 non-metals

Question number: 579

» Combustion and Flame

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MCQ▾

Question

Sarita’s grandmother told her that she used to cook on chulha and used dry wood or coal as fuel. Sarita’s mother uses LPG for cooking. Which of the cooking method is beneficial?

Choices

Choice (4) Response

a.

These are equally harmful

b.

These are equally beneficial

c.

Cooking with wood or coal

d.

Cooking with LPG

Question number: 580

» Reproduction in Animals

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MCQ▾

Question

Shiva looks exactly like his grandfather though his father do not resemble his grandfather.

Choices

Choice (4) Response

a.

The baby perform characters and features of either mother or father but the other’s characters are hidden in him.

b.

Shiva’s grandfather’s characters and features are hidden in his father as he does not look like him.

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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