NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1871 - 1877 of 2028

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Question 1871

Question

MCQ▾

Inspite of having dangerous problems with hydrogen, it is used as fuel for some applications. What are they?

Choices

Choice (4)Response

a.

Car fuel

b.

Oxyhydrogen flame

c.

Rocket fuel

d.

All a., b. and c. are correct

Question 1872

Question

MCQ▾

When fire is caused by burning petrol and oil, then what type of fire extinguishers must be used?

Choices

Choice (4)Response

a.

type

b.

Water type

c.

Soda-acid type

d.

Foam type

Question 1873

Question

MCQ▾

Which of the following is required for the spontaneous combustion to take place?

Choices

Choice (4)Response

a.

A flame is required

b.

A spark required

c.

Rise in temperature is required

d.

Nothing is required

Question 1874

Question

MCQ▾

Which of the following complex mixture of hydrocarbon is well known as crude oil?

Choices

Choice (4)Response

a.

Liquid hydrocarbons

b.

Solid hydrocarbons

c.

Gas hydrocarbons

d.

All a., b. and c. are correct

Question 1875

Question

MCQ▾

What is the formula of ‘Alumina’ ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 1876

Question

MCQ▾

Which of the following is the chemical formula of magnetite?

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question 1877

Question

MCQ▾

Biogas is a mixture of?

Choices

Choice (4)Response

a.

b.

c.

d.

Developed by: