NSO Level 1- Science Olympiad (SOF) Class 8: Questions 959 - 961 of 1175

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Question 959

Appeared in Year: 2012

Question

MCQ▾

Three experiment to investigate the re activities of three metals are shown.

What is the correct order of reactivity for these three metals?

Image Shows Three Experiment

Choices

Choice (4)Response

a.

Manganese, Nickel, Chromium

b.

Manganese, Chromium, Nickel

c.

Nickel, Chromium, Manganese

d.

Chromium, Manganese, Nickel

Question 960

Question

MCQ▾

The arrangement used in tall buildings to protect it from damage or destruction due to lightning is called

Choices

Choice (4)Response

a.

Ear thing

b.

Antenna

c.

Lightning conductor

d.

Relay dish

Question 961

Appeared in Year: 2012

Question

MCQ▾

A copper disc has a circular hole drilled in it so that it can act as washer for a nut and bolt. If this washer is heated equally all over which of the given option will be true?

Image Shows Circumference of Inner Hole and Washer

Choices

Choice (4)Response

a.

Circumference of inner hole: Increases , Circumference of washer: Increases

b.

Circumference of inner hole: Increases , Circumference of washer: Decreases

c.

Circumference of inner hole: Decreases , Circumference of washer: Increases

d.

Circumference of inner hole: Remains constant , Circumference of washer: Increases

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