NSO Level 1- Science Olympiad (SOF) Class 8: Questions 589 - 593 of 1175

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Question 589

Question

MCQ▾

Igniting a fire cracker is an example of

Choices

Choice (4)Response

a.

Incomplete combustion

b.

Spontaneous combustion

c.

Rapid combustion

d.

Explosion

Question 590

Question

MCQ▾

Phosphorous is stored under water. The reason is

Choices

Choice (4)Response

a.

Ignition temperature of phosphorous is lower than room temperature

b.

It undergoes spontaneous combustion in room temperature

c.

Both a. and b. are correct

d.

None of the above

Question 591

Question

MCQ▾

Generally non-metals are poor conductors of heat and electricity but this non-metal is a good conductor of heat and electricity.

Choices

Choice (4)Response

a.

Carbon

b.

Graphite

c.

Phosphorus

d.

None of the above

Question 592

Question

MCQ▾

The process of applying Zinc coating to iron to prevent rusting is called

Choices

Choice (4)Response

a.

Galvanization

b.

Painting

c.

Ionization

d.

Vulcanization

Question 593

Question

MCQ▾

Most of the birds lay one egg at a time but reptiles lay many eggs at a time. The explanation of this statement is

Choices

Choice (4)Response

a.

Reptiles do not take care of their eggs.

b.

There are chances of other animals to feed on eggs and destroy them.

c.

Birds brood on eggs and take care of them till they hatch out to young ones.

d.

All a., b. and c. are correct

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