NSO Level 1- Science Olympiad (SOF) Class 10: Questions 941 - 946 of 986

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Question number: 941

» Acids, Bases and Salts

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MCQ▾

Question

Read the paragraph and Answer the question.

On During electrolysis chlorine and dry slaked lime. it gives is used for disinfecting drinking water to make it free of germs, as an oxidizing agent in many chemical industries etc.

What is ?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 942

» Acids, Bases and Salts

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MCQ▾

Question

Which gas is evolved when sodium hydrogen carbonate is added to acetic acid?

Choices

Choice (4) Response

a.

Carbone Dioxide

b.

Hydrogen

c.

Oxygen

d.

All of the above

Question number: 943

» Our Environment and Its Management

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MCQ▾

Question

In 1987, to check depletion of the ozone layer, which protocol came into existence?

Choices

Choice (4) Response

a.

Montreal Protocol

b.

UNFCCC

c.

Kyoto Protocol

d.

Protocol on Persistent Organic Pollutants

Question number: 944

» Acids, Bases and Salts

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MCQ▾

Question

What gas is evolved when a hydrochloric acid reacts with a metal iron?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 945

» Magnetic Effects of Electric Current

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MCQ▾

Question

Commercial electric motors do not use

Choices

Choice (4) Response

a.

An electromagnet to rotate the armature

b.

A soft iron core on which the coil is wound

c.

Effectively large number of turns of conducting wire in the current carrying coil

d.

A permanent magnet to rotate the armature

Question number: 946

» Our Environment and Its Management

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MCQ▾

Question

In an ecosystem, the 10 % of energy available for transfer from one trophic level to the next is in the form of

Choices

Choice (4) Response

a.

Light energy

b.

Mechanical energy

c.

Chemical energy

d.

Heat energy