NSO Level 1- Science Olympiad (SOF) Class 10: Questions 673 - 678 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

Question number: 678

» Acids, Bases and Salts

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MCQ▾

Question

A teacher gave two test tube, one containing water and the other containing , to the student and asked them to identify the test tube containing solution. Which of the following can be used for the identification?

Choices

Choice (4)Response

a.

Red litmus

b.

Blue litmus

c.

None of the above

d.

Question does not provide sufficient data or is vague

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