NSO Level 1- Science Olympiad (SOF) Class 9: Questions 677 - 680 of 1123

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Question number: 677

» Mental Ability

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MCQ▾

Question

Nine people are planning to share equally the cost of a rental car. If one person withdraws from the arrangement and the others share equally the entire cost of the car, then the share of each of the remaining persons increased by:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 678

» Chemistry » Structure of the Atom

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MCQ▾

Question

Identify the Atom Models from the given clue

1. Electrons are embedded in a positively charged sphere.

2. An atom consists of a positively charged nucleus at the centre. Electrons revolve round the nucleus in well-defined orbits.

3. There are certain orbits known as discrete orbits or shells in which electrons revolve around the nucleus.

Choices

Choice (4) Response

a.

1. Rutherford’s Model, 2. Thomson’s Model, 3. Bohr’s Model

b.

1. Thomson’s Model, 2. Bohr’s Model, 3. Rutherford’s Model

c.

1. Thomson’s Model, 2. Rutherford’s Model, 3. Bohr’s Model

d.

1. Bohr’s Model, 2. Thomson’s Model, 3. Rutherford’s Model

Question number: 679

» Chemistry » Matter

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MCQ▾

Question

The temperature at which a solid changes into its liquid form is called

Choices

Choice (4) Response

a.

condensation point

b.

freezing point

c.

boiling point

d.

melting point

Question number: 680

» Chemistry » Matter

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MCQ▾

Question

The temperature at which a gas condenses to its liquid form is called its

Choices

Choice (4) Response

a.

condensation point

b.

freezing point

c.

melting point

d.

boiling point

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