NSO Level 1- Science Olympiad (SOF) Class 8: Questions 1042 - 1045 of 1076

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Question number: 1042

» Chemical Effects of Electric Current

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MCQ▾

Question

Applying a layer of zinc on an article by electroplating is called

Choices

Choice (4) Response

a.

Galvanization

b.

Metal plating

c.

Anodizing

d.

Anodizing and Galvanization

Question number: 1043

» Synthetic Fibres and Plastics

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Appeared in Year: 2012

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-1) List-Ⅱ (Column-2)

(A)

Shearing

(i)

Sheared hair are washed thoroughly to remove the impurities

(B)

Carding

(ii)

The Fleece of the sheep along with a thin layer of skin is removed.

(C)

Scouring

(iii)

Unwinding silk fibers from a cocoon

(D)

Reeling

(iv)

Wool fibers are passed through rollers to straighten the fibers.

Choices

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

a.

  • (iii)
  • (i)
  • (ii)
  • (iv)

b.

  • (ii)
  • (iv)
  • (i)
  • (iii)

c.

  • (iii)
  • (i)
  • (iv)
  • (ii)

d.

  • (iv)
  • (ii)
  • (iii)
  • (i)

Question number: 1044

» Some Natural Phenomena

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MCQ▾

Question

The device for determining the presence of electric charges is called

Choices

Choice (4) Response

a.

A periscope

b.

A microscope

c.

A telescope

d.

An electroscope

Question number: 1045

» Chemical Effects of Electric Current

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MCQ▾

Question

Sita and her mother reached a jewellery shop to purchase some ornaments. She liked a necklace very much but her mother told her not to purchase it because it is not real gold. When she checked the information tag, it was written that 1gm gold. The necklace was quite big and heavy. She was surprised to see it and asked about it. The sales man explained her that

Choices

Choice (4) Response

a.

It is made up of light weight gold.

b.

It is made up of 1 gm gold but water is filled inside.

c.

It is made up of copper and 1gm gold is applied on it by electroplating.

d.

It is made up of 1gm gold only and is hollow inside.

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