NSO Level 1- Science Olympiad (SOF) Class 10: Questions 936 - 940 of 986

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Question number: 936

» Metals and Non - Metals

Edit
MCQ▾

Question

Which is not an example of native metal?

Choices

Choice (4) Response

a.

Sulphur

b.

Platinum

c.

Carbone

d.

Both a. and c. are correct

Question number: 937

» Acids, Bases and Salts

Edit
MCQ▾

Question

A drop of liquid sample was put on the pH paper. The colour of the pH paper turned red. The liquid sample could be that of

Choices

Choice (4) Response

a.

Dilute hydrochloric acid

b.

Distilled water

c.

Lemon juice

d.

Sodium bicarbonate

Question number: 938

» Light - Reflection and Refraction

Edit
Match List-Ⅰ List-Ⅱ▾

Question

Match the column I and column II and the select the correct option from the coded given below:

List-Ⅰ (Column I) List-Ⅱ (Column II)

(A)

Spherical Mirror

(i)

Rough surface

(B)

Regular reflection

(ii)

Shiny or polished surface

(C)

Irregular reflection

(iii)

Curved reflecting surface

(D)

Plane Mirror

(iv)

Straight and flat surface

Choices

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

a.

  • (iii)
  • (ii)
  • (i)
  • (iv)

b.

  • (i)
  • (iii)
  • (ii)
  • (iv)

c.

  • (ii)
  • (iii)
  • (iv)
  • (i)

d.

  • (iv)
  • (i)
  • (ii)
  • (iii)

Question number: 939

» Light - Reflection and Refraction

Edit
MCQ▾

Question

Air is not visible because it

Choices

Choice (4) Response

a.

The molecules of air are smaller than the wavelength of the light

b.

Transmit whole of light

c.

Is nearly a perfectly transparent substance

d.

All a. , b. and c. are correct

Question number: 940

» Magnetic Effects of Electric Current

Edit
MCQ▾

Question

The most important safety method used for protecting home appliances from short-circuiting or overloading is

Choices

Choice (4) Response

a.

Earthing

b.

Use of electric meter

c.

Use of fuse

d.

Use of stabilizers