NSO Level 1- Science Olympiad (SOF) Class 10: Questions 625 - 630 of 986

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Question number: 625

» Light - Reflection and Refraction

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MCQ▾

Question

If denote angle of incidence and angle of reflection, respectively, then

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 626

» Acids, Bases and Salts

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MCQ▾

Question

The acid having the highest ions concentration is one with

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 627

» Acids, Bases and Salts

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MCQ▾

Question

The Bases having the highest ions concentration is one with

Choices

Choice (4) Response

a.

b.

c.

d.

Passage

Direction: Read the passage carefully and answer the questions below

The surface of the ocean is at a higher temperature than the layers below. This temperature difference is exploited to generate energy. This requires Ocean Thermal Energy Conversion plants, which converts ocean thermal energy to electricity.

Question number: 628 (1 of 2 Based on Passage) Show Passage

» Sources of Energy

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MCQ▾

Question

Fill the blank space.

A minimum temperature difference of ________ C is needed between water at the surface and at a depth of about ________ km.

Choices

Choice (4) Response

a.

b.

c.

d.

Any of the above

Question number: 629 (2 of 2 Based on Passage) Show Passage

» Sources of Energy

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MCQ▾

Question

The surface of the ocean is at a higher temperature than the layers below. This is because of

Choices

Choice (4) Response

a.

Atmospheric air

b.

Earth magma

c.

Sun’s heat warms up the upper layers of the sea

d.

Question does not provide sufficient data or is vague

Question number: 630

» Metals and Non - Metals

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MCQ▾

Question

Which is not correct statement for ore?

Choices

Choice (4) Response

a.

Metal of high reactivity Sulphide ore

b.

Metal of low reactivity Sulphide ore

c.

Metal of medium reactivity Carbonate ore

d.

Metal of high reactivity Electrolysis of molten ore