NSO Level 1- Science Olympiad (SOF) Class 10: Questions 673 - 677 of 986

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Question number: 673

» Light - Reflection and Refraction

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MCQ▾

Question

Which of the following statement is false?

Choices

Choice (4) Response

a.

A line drawn in the direction of propagation of light is known as a ray of light

b.

A group of rays of light emitted by a source of light is known as a beam of Light

c.

A group of light rays parallel to each other is known as parallel beam of light

d.

A group of light rays spreading out from a source of light is known as a convergent beam of light

Question number: 674

» Light - Reflection and Refraction

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MCQ▾

Question

The change in direction of light when it passes from one medium to another medium obliquely is known as a

Choices

Choice (4) Response

a.

Refraction

b.

Divergent

c.

Reflection

d.

None of the above

Question number: 675

» Our Environment and Its Management

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MCQ▾

Question

Which one of the following is an artificial ecosystem?

Choices

Choice (4) Response

a.

Pond

b.

Lake

c.

Crop field

d.

Forest

Question number: 676

» Sources of Energy

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MCQ▾

Question

Which component of Petroleum has a boiling point ?

Choices

Choice (4) Response

a.

Paraffin Wax

b.

Petrol

c.

Lubrication oil

d.

Diesel

Question number: 677

» Acids, Bases and Salts

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MCQ▾

Question

Which one is correct?

Choices

Choice (4) Response

a.

Strong base and weak acid are basic in nature, with pH value more than 7

b.

Salts of a strong acid and a strong base are neutral with pH value of .

c.

Salts of a strong acid and weak base are acidic with pH value less than

d.

All a. , b. and c. are correct