NSO Level 1- Science Olympiad (SOF) Class 10: Questions 919 - 924 of 986

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Question number: 919

» Our Environment and Its Management

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MCQ▾

Question

Which of the following groups contain only non-biodegradable items?

Choices

Choice (4) Response

a.

Fruit peels, cake and lime juice

b.

Plastic, Bakelite, DDT

c.

Cake, wood and grass

d.

Grass, flowers and leather

Question number: 920

» Carbon and Its Componds

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MCQ▾

Question

Which one is not correct?

Formic acid is used in

Choices

Choice (4) Response

a.

Preservative and antibacterial agent

b.

Various cleaning products

c.

Fuel cells

d.

None of the above

Question number: 921

» Metals and Non - Metals

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MCQ▾

Question

Which is not an example of Calcination?

Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

Question number: 922

» Magnetic Effects of Electric Current

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MCQ▾

Question

A proton moves freely in a magnetic field. Which of the following property of a proton changes?

Choices

Choice (4) Response

a.

Velocity

b.

Gravity

c.

Weight

d.

All of the above

Question number: 923

» Light - Reflection and Refraction

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MCQ▾

Question

Which is a not correct statement for law of reflection?

Statement 1: The angle of incidence is equal to the angle of reflection

Statement 2: The incident ray, the normal to the mirror at the point of incidence and the reflected ray, all lie in the different plane

Choices

Choice (4) Response

a.

Statements 1 and 2 are incorrect

b.

Statements 1 and 2 are correct

c.

Only Statement 1 is correct

d.

Only Statement 2 is correct

Question number: 924

» Chemical Reactions and Equation

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MCQ▾

Question

Zinc filings were added to a solution of Zinc sulphate. After miniutes, it was observed that the colour solution changed and a deposit at the bottom of the beaker was observed. The colour of the solution and that of the deposit would respectively be

Choices

Choice (4) Response

a.

Yellow and green

b.

Colorless

c.

Red and greenish-blue

d.

Green and reddish-brown