Chemical Effects of Electric Current [NSO Level 1- Science Olympiad (SOF) Class 8]: Questions 10 - 14 of 65

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Question 10

Chemical Effects of Electric Current

Question

MCQ▾

The picture shown below represents a

Image Shows Light Emiting Diode

Choices

Choice (4)Response

a.

Light emitting diode

b.

Light emitting device

c.

Low energy device

d.

Question does not provide sufficient data or is vague

Question 11

Chemical Effects of Electric Current

Question

MCQ▾

When electricity passes through a conducting solution, the molecules dissociate into

Choices

Choice (4)Response

a.

Protons

b.

Atoms

c.

Ions

d.

Electron

Question 12

Chemical Effects of Electric Current

Question

MCQ▾

Aditya collected two cells, a bulb, two metal strips, some electric wire and some distilled water in a beaker. He has connected the provided items as given in the figure.

Image Shows Conduction of Electricity

He noticed that the bulb still did not glow. What should he do to make it glow?

Choices

Choice (4)Response

a.

Add some salt to the water

b.

Ensure the battery is expired or not

c.

Check for loose contact

d.

All of the above

Question 13

Chemical Effects of Electric Current

Question

MCQ▾

Materials which allow electricity to pass through them easily are called

Choices

Choice (4)Response

a.

Insulators

b.

Good conductors

c.

Poor conductors

d.

All of the above

Question 14

Chemical Effects of Electric Current

Appeared in Year: 2012

Question

MCQ▾

Sudha took a small amount of sulphur in deflagrating spoon and heated it over a burner. As soon as it started burning, she put it in gas jar and covered with a lid. After sulphur stopped burning, she added a small amount of water in it and dissolved the gas in water by shaking it. She then tested the solution with red and blue litmus paper. What did she observe?

Image Shows Tasting of Litmus Paper

Choices

Choice (4)Response

a.

There was no change in the colour of litmus paper.

b.

Blue litmus paper turned red and red litmus paper turned blue.

c.

In the solution the red litmus paper turned blue.

d.

In the solution the blue litmus paper turned red.

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