NSO Level 1- Science Olympiad (SOF) Class 9: Questions 719 - 723 of 1123

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Question number: 719

» Chemistry » Atoms & Molecules

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MCQ▾

Question

Which of the following is not a postulate of Dalton’s atomic theory

Choices

Choice (4)Response

a.

Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.

b.

All matter is made of very tiny particles called atoms.

c.

Atoms combine in the ratio of small whole numbers to form compounds.

d.

None of the above

Question number: 720

» Chemistry » The Nature of Matter

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MCQ▾

Question

This picture shows the process of separation of components in a mixture. This technique is called

The process of separation of components in a mixture

The Process of Separation of Components in a Mixture

Choices

Choice (4)Response

a.

Distillation

b.

Sublimation

c.

Filtration

d.

Chromatography

Question number: 721

» Biology » Diversity of Living Organisms

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MCQ▾

Question

Aisha has identified a triploblastic coelomate segmented animal as an arthropod. Which additional character she should have verified before identifying that animal as an arthropod?

Choices

Choice (4)Response

a.

Type of symmetry

b.

Presence of antenna

c.

Presence of wings

d.

Type of coelom

Question number: 722

» Chemistry » Structure of the Atom

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MCQ▾

Question

This atom does not have any neutrons in its nucleus. The atom is

Choices

Choice (4)Response

a.

Na

b.

H

c.

He

d.

Ca

Question number: 723

» Biology » Health & Diseases

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MCQ▾

Question

Children are vaccinated because

Choices

Choice (4)Response

a.

It prevents the entry of disease causing organism

b.

Vaccination kills the disease causing micro-organisms

c.

It creates immunity against the disease causing microbes in the body

d.

None of the above

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