NSO Level 1- Science Olympiad (SOF) Class 10: Questions 655 - 658 of 986

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Question number: 655

» Sources of Energy

Edit
MCQ▾

Question

Consider the following statements. In nuclear power reactors

(i) is used as a fuel in nuclear reactor in form of uranium rods

(ii) Nuclear fusion is the source of energy in the sun and other stars

(iii) Graphite is used as a moderator

Which of the above statements are correct?

Choices

Choice (4)Response

a.

(ii) and (iii)

b.

(i) and (iii)

c.

(i), (ii) and (iii)

d.

(i) and (ii)

Question number: 656

» Our Environment and Its Management

Edit
Match List-Ⅰ List-Ⅱ▾

Question

Match column I and column II and select the correct option from the codes given below.

List-Ⅰ (Column I)List-Ⅱ (Column II)

(A)

Omnivore

(i)

Alligator

(B)

Tertiary Consumers

(ii)

Opossum

(C)

Carnivores

(iii)

Marine fish

(D)

Parasitism

(iv)

Wolves

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (ii)
  • (i)
  • (iv)
  • (iii)

b.

  • (iii)
  • (ii)
  • (i)
  • (iv)

c.

  • (iv)
  • (i)
  • (ii)
  • (iii)

d.

  • (i)
  • (iii)
  • (iv)
  • (ii)

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

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