NSO Level 1- Science Olympiad (SOF) Class 10: Questions 799 - 805 of 986

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Question number: 799

» Light - Reflection and Refraction

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MCQ▾

Question

The rays of a parallel beam of light do not remain parallel after reflection from

Choices

Choice (4) Response

a.

Convex mirror

b.

Irregular reflecting surface

c.

Concave mirror

d.

Plane mirror

Question number: 800

» Chemical Reactions and Equation

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MCQ▾

Question

Which of the following is not true?

Choices

Choice (4) Response

a.

If a substance loses oxygen during a reaction, it is said to be oxidized.

b.

At high temperature, almost all metals (except Ag, Au and Pt) are oxidized.

c.

Alkali metals (Li, Na, K etc. ) and alkaline earth metals (Mg, Ca, Sn, etc. ) are rapidly oxidized at low temperature.

d.

Question does not provide sufficient data or is vague

Question number: 801

» Our Environment and Its Management

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MCQ▾

Question

What is coliform?

Choices

Choice (4) Response

a.

Group of bacteria

b.

Group of microorganisms

c.

Group of diseases

d.

Group of viruses

Question number: 802

» 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.

Question number: 803

» Carbon and Its Componds

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MCQ▾

Question

Acetic acid react with Alcohols and produces

Choices

Choice (4) Response

a.

Water

b.

Hydrogen

c.

Carbon dioxide

d.

None of the above

Question number: 804

» Our Environment and Its Management

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MCQ▾

Question

The Ganga action plan was launched in

Choices

Choice (4) Response

a.

1988

b.

1987

c.

1986

d.

1980

Question number: 805

» Carbon and Its Componds

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MCQ▾

Question

Choose correct option for below structure:

Figure of the chemical structure

Figure of the Chemical Structure

Figure of the chemical structure

Choices

Choice (4) Response

a.

Alcohol

b.

Isomers

c.

Benzene

d.

Cyclic