NSO Level 1- Science Olympiad (SOF) Class 8: Questions 958 - 961 of 1076

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Question number: 958

» Combustion and Flame

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Appeared in Year: 2012

MCQ▾

Question

If Raman opened the air hole of a Bunsen burner fully and lighted the burner he will get ________.

Choices

Choice (4) Response

a.

A non -luminous flame, which is pale blue in colour.

b.

A flame that strike back, which is thin blue or green-yellow in colour.

c.

A luminous flame, which is orange-yellow in colour.

d.

A smoky flame, which gives off a lot of soot.

Question number: 959

» Metals and Non-Metals

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Appeared in Year: 2012

MCQ▾

Question

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

Image Shows Three Experiment

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 number: 960

» Some Natural Phenomena

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MCQ▾

Question

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 number: 961

» Metals and Non-Metals

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Appeared in Year: 2012

MCQ▾

Question

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

Image Shows Circumference of Inner Hole and Washer

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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