NSO Level 1- Science Olympiad (SOF) Class 8: Questions 453 - 458 of 1178

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Question 453

Question MCQ▾

Identify the polymers from its use

It is used as non stick coating for cookware, pipe work for reactive and corrosive chemicals, as a lubricant in machineries, graft material in surgical interventions and coating on catheters

Choices

Choice (4)Response

a.

Nylon

b.

PVC

c.

Polythene

d.

Teflon

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Question 454

Question MCQ▾

Tungsten is used to make filaments in electric bulb. Which property of metals is used here?

Choices

Choice (4)Response

a.

Ductility

b.

High melting point

c.

Conductivity

d.

All a., b. and c. are correct

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Question 455

Question MCQ▾

Some of the most common blended fabrics are given in the questions. Find out the benefit of the blend over individual fabric.

Jute fibre is used to make

Choices

Choice (4)Response

a.

Gunny bags

b.

Fabric

c.

Decorative articles

d.

All a., b. and c. are correct

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Question 456

Question MCQ▾

Options are given in the jumbled form. Reshuffle the spellings and identify the correct options.

A thermosetting plastic

Choices

Choice (4)Response

a.

Relyente

b.

Yopetlers

c.

Yoln

d.

Lemanemi

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Question 457

Question MCQ▾

The non-metal essential for life is

Choices

Choice (4)Response

a.

Bromine

b.

Graphite

c.

Iodine

d.

Carbon

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Question 458

Question MCQ▾

Mother gave Meena two small pouches containing iron fillings and coal and asked her to crush both to a fine powder. She could make a fine powder of coal but could not powder iron fillings. The reason behind it is

Choices

Choice (4)Response

a.

Iron is a metal and coal is a non-metal

b.

Metals are hard and non-metals are soft and brittle

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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