CBSE Class-8 Science: Questions 339 - 345 of 469

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Question number: 339

» Chemical Effects of Electric Current » Chemical Effects of Electric Current » Concept to Chemical Effects of Electric Current

MCQ▾

Question

The passage of an electric current through a liquid causes chemical changes is called as:

Choices

Choice (4) Response

a.

Electrode

b.

Electrolysis

c.

Electroplating

d.

Question does not provide sufficient data or is vague

Question number: 340

» Some Natural Phenomena » The Story of Lightning » Do's and Don'ts During a Thunderstorms

MCQ▾

Question

What to do during thunderstorm:

Choices

Choice (4) Response

a.

Unplug all the electrical and electronic equipment

b.

Monitor thunderstorms from indoors

c.

Avoid contact with all sorts of pipes

d.

All a. , b. and c. are correct

Question number: 341

» Sound » Property of Sound » Audible and Inaudible Sound

MCQ▾

Question

The sound which a normal human can hear is called as:

Choices

Choice (4) Response

a.

Audible sounds

b.

Inaudible sounds

c.

All of the above

d.

Question does not provide sufficient data or is vague

Question number: 342

» Sound » Property of Sound » Hearing Impairment

MCQ▾

Question

Ear protectors must be used by the:

Choices

Choice (4) Response

a.

Pneumatic drill operators

b.

Factory workers

c.

Tractors drivers

d.

All a. , b. and c. are correct

Question number: 343

» Some Natural Phenomena » Earthquakes » Protection Against Earthquakes

MCQ▾

Question

If you are indoors what to do during earthquake

Choices

Choice (4) Response

a.

Pick a safe place where things will not fall on you

b.

Get under a desk table or bench

c.

Run outside

d.

Both a. and b. are correct

Question number: 344

» Some Natural Phenomena » Earthquakes » Structure of the Earth

MCQ▾

Question

Earth is made up of:

Choices

Choice (4) Response

a.

Two layers

b.

Three layers

c.

Four layers

d.

All of the above

Question number: 345

» Some Natural Phenomena » Transfer of Charge » Discharged and Earthing

MCQ▾

Question

Allowing the charge to flow to the earth is called:

Choices

Choice (4) Response

a.

Earthing

b.

Lightning

c.

Charging

d.

Discharging

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