NSO Level 1- Science Olympiad (SOF) Class 8: Questions 676 - 680 of 1076

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Question number: 676

» Reproduction in Animals

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MCQ▾

Question

Here are different stages of conception and child birth. Arrange them in the correct order.

  1. The ovum comes out of the ovary and reaches the fallopian tube.

  2. Zygote undergoes cell division and forms the embryo.

  3. Sperm reaches the fallopian tube and fertilisation takes place.

  4. Embryo gets implanted in the uterus and conception takes place.

  5. Embryo develops to foetus and then to a fully grown baby

Choices

Choice (4) Response

a.

3,1, 2,4, 5

b.

1,3, 4,2, 5

c.

2,4, 3,1, 5

d.

1,3, 2,4, 5

Question number: 677

» Combustion and Flame

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MCQ▾

Question

Water is used as a fire extinguisher. How does it help to put out the fire?

Choices

Choice (4) Response

a.

Water brings the temperature below its ignition temperature

b.

Water cools the combustible substance

c.

Water vapour cuts off the air supply

d.

All a. , b. and c. are correct

Question number: 678

» Metals and Non-Metals

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MCQ▾

Question

The process of purification of metals from the ores is called

Choices

Choice (4) Response

a.

Refining

b.

Reduction

c.

Mining

d.

Concentration

Question number: 679

» Combustion and Flame

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MCQ▾

Question

Which of the following is used as an extinguisher when a fire is caused by oil?

Choices

Choice (4) Response

a.

Water

b.

Oxygen

c.

Carbon dioxide

d.

Question does not provide sufficient data or is vague

Passage

Image shows Metal Figure

Image Shows Metal Figure

Image shows Metal Figure

Question number: 680 (1 of 3 Based on Passage) Show Passage

» Metals and Non-Metals

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MCQ▾

Question

In fig. B after some time, the blue solution becomes colourless. The reason is

Choices

Choice (4) Response

a.

absorbs the blue colour and and makes the solution colourless

b.

replaces zinc and colourless solution is formed

c.

replaces Cu from and colourless solution is formed

d.

Question does not provide sufficient data or is vague

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