Chemical Effects of Electric Current

This is an MCQ-based quiz on the topic Chemical Effects of Electric Current.

It covers Conduction, Insulation, Heating Effect, and Electrolysis

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A battery is used to:

Convert chemical current into electric Maintain a potential difference current Measure the current Measure the temperature

Which of the following is a good conductor of electricity:

Istilled water Tap water Kerosene None of these

Magnetic compass connected in a circuit is used to check:

Magnetism in electric current

Slow current

Small current

None of these

Tap water is a good conductor of electricity while distilled water is not because

Tap water contain salts Distilled water do not contain salt Only (a) is correct Both (a) & (b) is correct

When electrodes are immersed in water and electricity passed, the bubbles formed on the positive terminal is actually _______ gas.

Hydrogen Carbon dioxide Oxygen Nitrogen

Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?

To increase acidity To increase conductivity So that the colour becomes more prominent To burn copper sulphate

The process of depositing a layer of any desired metal on another material by means of electricity is called ___________.

Electric plating Electroplating Electric depositing None of the above

Tin cans, used for storing food, are made by electroplating tin onto iron. Why?

Tin gives a shiny appearance To make the vessel cheap Tin is less reactive than iron. To make the vessel lighter

An electric current can produce:

Heating effect Chemical effect Magnetic effect Chemical, heating, and magnetic effects.

In a science quiz competition, Payel is asked a question where she had to choose the statement which was/were correct?

A strong electrolyte is a liquid or solution which conducts electricity very well. A weak electrolyte is a liquid or solution which conducts electricity to a lesser extent. A solid electrical conductor through which an electric current enters or leaves something like a dry cell, is called an electrode. All the above

Which of the following metals are produced by the electrolysis of their molten compounds?

Copper and Silver Silver and Aluminium Aluminium and Sodium Sodium

Which of the following types of energy can be used can be used to decompose water into its elements?

Heat energy Light energy Chemical energy Electrical energy

In an activity to check the conduction of electricity through two liquids labelled A and B by using a bulb, it is observed that the bulb glows brightly for liquid B while it glows very dimly for liquid A.

Liquid A is a better conductor than liquid B Liquid B is a better conductor than liquid A Both liquids are equally conducting Conducting properties of liquids cannot be compared in this manner

Which of the following is a bad conductor of electricity?

Distilled water Silver nitrate Sulphuric acid Copper sulphate

Which of the following does not conduct electricity?

Sugar solution Vinegar solution Lemon juice solution Caustic soda solution

Which of the following is a good conductor?

Brick Steel Plastic Cotton

Which is not a non-electrolyte?

Ethyl alcohol Sodium chloride Urea Sodium solution

Which of the following is not used for electroplating metal articles?

Nickel Silver Chromium Sodium

The negative charged ions are called:

Cations