NSO Level 1- Science Olympiad (SOF) Class 7: Questions 270 - 273 of 597

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Question number: 270

» Physical and Chemical Changes

Edit
MCQ▾

Question

Expansion of metals on heating is an example of which of the following?

Choices

Choice (4)Response

a.

Combination of physical and chemical change.

b.

Chemical change

c.

Physical change

d.

Neither physical nor chemical change.

Question number: 271

» Fibre to Fabric

Edit
Match List-Ⅰ List-Ⅱ▾

Question

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

List-Ⅰ (Column I)List-Ⅱ (Column II)

(A)

Cotton

(i)

Insect fibre

(B)

Nylon

(ii)

Textile fibre

(C)

Silk

(iii)

Toothbrush fibre

(D)

Wool

(iv)

Plant fibre

Choices

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

a.

  • (iii)
  • (i)
  • (ii)
  • (iv)

b.

  • (iv)
  • (iii)
  • (i)
  • (ii)

c.

  • (ii)
  • (i)
  • (iii)
  • (iv)

d.

  • (ii)
  • (i)
  • (iv)
  • (iii)

Question number: 272

» Heat

Edit
MCQ▾

Question

If a plastic spoon is dipped in a cup of ice cream. Its other end becomes

Choices

Choice (4)Response

a.

Cold by the process of convection

b.

Cold by the process of conduction

c.

Does not become cold.

d.

Cold by the process of radiation

Question number: 273

» Physical and Chemical Changes

Edit
MCQ▾

Question

Identify the given image and select the correct option indicating the change involved.

Image of the growth of seed to a plant

Image of the Growth of Seed to a Plant

Choices

Choice (4)Response

a.

Physical change.

b.

Neither chemical nor physical change.

c.

Chemical change.

d.

Combination of Physical & Chemical change

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