Chemistry (NSO Level 1- Science Olympiad (SOF) Class 9): Questions 1 - 5 of 204

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Question number: 1

» Chemistry » Atoms & Molecules

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MCQ▾

Question

The ratio by number of atoms of hydrogen and oxygen in water is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2

» Chemistry » Matter

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Question

What does the straight lines RQ and ST represent in the graph?

The straight lines RQ and ST

The Straight Lines RQ and ST

The straight lines RQ and ST

Choices

Choice (4) Response

a.

The heat absorbed/released is used for change of state

b.

RQ is the latent heat of fusion of ice and ST is the latent heat of condensation

c.

The temperature remains steady

d.

All a. , b. and c. are correct

Question number: 3

» Chemistry » Atoms & Molecules

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Question

The molecular formulae of all the possible compounds formed from the given ions are (ions - -

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 4

» Chemistry » Atoms & Molecules

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Question

Identify the anion and cation in sodium chloride

Choices

Choice (4) Response

a.

Sodium and chlorine are anions

b.

Sodium is the cation and chlorine is the anion

c.

Chlorine is the cation and sodium is the anion

d.

Sodium and chlorine are cations

Question number: 5

» Chemistry » Structure of the Atom

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Question

Which of the following statements is true about isotopes?

Choices

Choice (4) Response

a.

Chemical properties of isotopes of an element are similar but their physical properties are different.

b.

Many elements consists of a mixture of isotopes

c.

Atomic number of isotopes is same but mass numbers are different

d.

All a. , b. and c. are correct

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