NSO Level 1- Science Olympiad (SOF) Class 10: Questions 657 - 664 of 986

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Question number: 657

» Chemical Reactions and Equation

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MCQ▾

Question

Which of the following is not a chemical reaction?

Choices

Choice (4) Response

a.

Electroplating a metal

b.

Mixing baking soda and vinegar to produce carbon dioxide gas

c.

Mixing salt and sand

d.

Cooking an egg

Question number: 658

» Acids, Bases and Salts

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MCQ▾

Question

What gas is evolved when reaction of sulphuric acid and aluminum takes place?

Choices

Choice (4) Response

a.

Hydrogen gas

b.

Water

c.

Oxygen gas

d.

None of the above

Question number: 659

» Chemical Reactions and Equation

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MCQ▾

Question

In the balanced equation

The value of a, b, c are respectively.

Choices

Choice (4) Response

a.

b.

c.

d.

Passage

Directional: Read the passage carefully and the answer the below two question

The refractive index of the water is 1.33 and refractive index of the glass is 1.50 and the speed of light is .

Question number: 660 (1 of 2 Based on Passage) Show Passage

» Light - Reflection and Refraction

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MCQ▾

Question

What is the speed of light in water?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 661 (2 of 2 Based on Passage) Show Passage

» Light - Reflection and Refraction

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MCQ▾

Question

What is the speed of light in glass?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 662

» Our Environment and Its Management

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MCQ▾

Question

Which of the following is an example of herbivores?

Choices

Choice (4) Response

a.

Lion

b.

Tiger

c.

Shark

d.

Cow

Question number: 663

» Light - Reflection and Refraction

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MCQ▾

Question

The image formed by an astronomical telescope is

Choices

Choice (4) Response

a.

Real and enlarged

b.

Virtual and diminished

c.

Virtual and enlarged

d.

Real and diminished

Question number: 664

» Sources of Energy

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MCQ▾

Question

The process involves transference of potential energy of the water into kinetic energy and then into electric energy. This happens in

Choices

Choice (4) Response

a.

Geothermal energy

b.

Nuclear energy

c.

Hydro electricity

d.

Ocean tidal energy