NSO Level 1- Science Olympiad (SOF) Class 8: Questions 629 - 634 of 1175

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Question 629

Question

MCQ▾

Find the odd one out from the given animals.

Choices

Choice (4)Response

a.

Bat

b.

Kiwi

c.

Penguin

d.

Ostrich

Question 630

Question

MCQ▾

Ovoviviparous are animals which produce fully developed eggs but the eggs hatch within the female՚s body. In this animal the eggs hatch within the male՚s body and the male give birth to young ones. Identify the animal.

Choices

Choice (4)Response

a.

Sea urchin

b.

Viper

c.

Sea horse

d.

Bat

Question 631

Question

MCQ▾

The inner surface of iron kadai and frying pan are coated with zinc. The reason is

Choices

Choice (4)Response

a.

Iron reacts with air and moisture to form rust

b.

Zinc acts as a protective cover to prevent the contact between iron and atmosphere

c.

Zinc reacts with oxygen to form zinc oxide.

d.

Both a. and b. are correct

Question 632

Question

MCQ▾

The ignition temperature of an inflammable substance would be

Choices

Choice (4)Response

a.

Medium

b.

Low

c.

Less than zero

d.

High

Question 633

Question

MCQ▾

A metal which is not malleable is

Choices

Choice (4)Response

a.

Platinum

b.

Copper

c.

Arsenic

d.

Aluminium

Question 634

Question

MCQ▾

Sodium is stored in kerosene. The reason is

Choices

Choice (4)Response

a.

Ignition temperature of sodium is lower than room temperature

b.

It undergoes spontaneous combustion in room temperature

c.

It reacts vigorously with water.

d.

All a., b. and c. are correct

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