NSO Level 1- Science Olympiad (SOF) Class 6: Questions 12 - 14 of 201

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Question number: 12

» Air and Water

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Appeared in Year: 2012

MCQ▾

Question

Which of the following activities would show that air is dissolved in water?

Choices

Choice (4) Response

a.

Take some water in a pan. Heat it gently on a gas burner. Observe the water as it begins to heat.

b.

Press steel wool into the bottom of the gas jar. Invert the gas jar into the bowl of water on two small wooden blocks so that there is space between the gas jar and the bowl.

c.

Press a piece of cotton wool into the bottom of a tumbler. Hold the tumbler upside down and insert it into a bowl of water, without tilting it.

d.

Question does not provide sufficient data or is vague

Question number: 13

» Fun with Magnets

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Appeared in Year: 2012

MCQ▾

Question

A student tries to magnetise a short steel rod. Which of the following tests will show that he has succeeded?

Choices

Choice (4) Response

a.

When freely suspended, the rod points in any direction.

b.

The rod picks up a small piece of paper.

c.

Together ends of a magnet attract the rod

d.

One end of a magnet repels the rod.

Question number: 14

» Air and Water

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Appeared in Year: 2012

MCQ▾

Question

Jaya made a hole in the cap of a bottle and filled it with coloured water. She put a straw through the hole and kept the bottle in a pan of very hot water. She observed that water starts coming out of the bottle in the form of a fountain and comes down when water cools down. What does her experiment show?

Diagram shows two water bottle

Diagram Shows Two Water Bottle

This diagram shows two water bottle

Choices

Choice (4) Response

a.

On heating, water vapours are converted into liquid which come out of the bottle.

b.

Air from the bottle comes out taking water with it.

c.

The water changes into vapours and comes out of the bottle.

d.

Liquids expand on heating and contract on cooling.

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