NSO Level 1- Science Olympiad (SOF) Class 8: Questions 451 - 454 of 1175

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Question 451

Question

MCQ▾

The material used for non stick coating is

Choices

Choice (4)Response

a.

Bakelite

b.

Teflon

c.

PVC

d.

Polythene

Question 452

Question

MCQ▾

There are two waste drums in Teena՚s housing colony. One is green and the other is red. Green is for collecting biodegradable waste and red is for collecting non biodegradable waste. Teena wants to dispose the following things. Please help her to segregate it.

Waste Drums

Choices

Choice (4)Response

a.

Plastic and wooden toys – red, crockery and woollen clothes - green

b.

Plastic and woollen clothes – red, wooden toys and crockery - green

c.

Plastic and crockery – green, wooden toys and woollen clothes - red

d.

Plastic and crockery – red, wooden toys and woollen clothes - green

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

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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