Chemical Effects of Electric Current (CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science): Questions 9 - 12 of 12

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Question number: 9

» Chemical Effects of Electric Current » Electroplating » Circuit for Electroplating

MCQ▾

Question

Galvanisation is defined as:

Choices

Choice (4) Response

a.

Plating of Zinc on to iron

b.

Plating of silver on cutlery

c.

Plating of tin on iron

d.

All of the above

Question number: 10

» Chemical Effects of Electric Current » Do Liquids Conducts Electricity? » Concept of Electric Current

MCQ▾

Question

It is quite possible that even though the liquid allows the electric current to pass through it, the circuit is complete and the bulb does not glow can you reason out why?

Choices

Choice (4) Response

a.

If the current in the circuit is too small the filament of the bulb does not get heated to a high temperature and bulb does not glow

b.

If opposition offered by the substance is small the current will be large and bulb glows

c.

If opposition is large current is small

d.

Both a. and c. are correct

Question number: 11

» Chemical Effects of Electric Current » Do Liquids Conducts Electricity? » Liquid Conducts Electricity

MCQ▾

Question

Liquids which conduct electricity are:

Choices

Choice (4) Response

a.

Solution of acids

b.

Solutions of bases

c.

Salt solution

d.

All a. , b. and c. are correct

Question number: 12

» Chemical Effects of Electric Current » Electroplating » Circuit for Electroplating

MCQ▾

Question

EPNS is:

Choices

Choice (4) Response

a.

Hallmark

b.

It’s a sign for electroplated nickel

c.

Both a. and b. are correct

d.

None of the above

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