NSO Level 1- Science Olympiad (SOF) Class 10: Questions 709 - 713 of 986

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Question number: 709

» Chemical Reactions and Equation

Edit
MCQ▾

Question

Aluminum 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.

Brown and blue

c.

Colorless

d.

Red and greenish-blue

Question number: 710

» Light - Reflection and Refraction

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MCQ▾

Question

If image formed is:

(i) Beyond the centre of curvature

(ii) Real and inverted

(iii) Larger than the object

Then at which place we arrange the object?

Choices

Choice (4) Response

a.

Object is at the centre of curvature (C)

b.

Object is in between focus (F) and centre of curvature (C)

c.

Object is at infinity

d.

Object is in between P and F

Question number: 711

» Sources of Energy

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MCQ▾

Question

In nuclear power plants, we get energy as a result of

Choices

Choice (4) Response

a.

Molecular reaction

b.

Potential reaction

c.

Nuclear reaction

d.

Fission reaction

Question number: 712

» Carbon and Its Componds

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MCQ▾

Question

The compound reacts with sulphuric acid and releases water. The compound is

Choices

Choice (4) Response

a.

Methanol

b.

Ethanoic acid

c.

Ethanol

d.

All of the above

Question number: 713

» Acids, Bases and Salts

Edit
Match List-Ⅰ List-Ⅱ▾

Question

Match both the columns and mark the correct option from the codes given below.

List-Ⅰ (Column I) List-Ⅱ (Column II)

(A)

Healthy Human saliva

(i)

5.0

(B)

Household Ammonia

(ii)

11.5

(C)

Battery Acid

(iii)

0.5

(D)

Coffee

(iv)

7.4

Choices

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

a.

  • (i)
  • (ii)
  • (iv)
  • (iii)

b.

  • (ii)
  • (i)
  • (iii)
  • (iv)

c.

  • (iv)
  • (i)
  • (iii)
  • (ii)

d.

  • (iv)
  • (ii)
  • (iii)
  • (i)