Physical and Chemical Changes: Rusting, Galvanization

This is an interactive quiz on Physical and Chemical Changes.

It covers various other topics such as rusting, galvanization and neutralization.

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In which of the following statement are incorrect?

When a candle burns both physical and chemical change take place Anaerobic bacteria digest animal waste and produce biogas Ships suffer a lot of damage though they are not painted Stretching of rubber band is not a physical change

Which of the following is a physical change?

Rusting of iron Combustion of magnesium ribbon Burning of candle Melting of wax

A chemical change may involve:

Change in colour only Change in temperature only Evolution of gas only All of these

In which of the following sentences is or are correct?

Rusting is a chemical change because a new substance is formed Beating of Aluminium metal to make Aluminium foil, is a physical change Digestion of food is a chemical change All the above

Iron Pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its stability?

It is more than 7 metre height It weighs about 6000 kg It was built more than 1600 years ago It has no rust after such long period

What is the formula of rust?

Fe2O3 Fe3O4 FeO None of these

How crystal of pure substances are obtained?

By crystallization By chromatography By peptization By all these methods

Which is a method to prevent rust?

Crystallization Sedimentation Galvanisation None of these

Which of the following is a chemical change?

Bursting of a fire cracker Germination of seed Coal formation from buried trees All of these

In which type of change a new substance is formed?

In physical change In chemical change In both (a) and (b) In neither of these

Galvanisation is a process used to prevent the rusting of which of the following?

Iron Zinc Aluminium Copper

Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?

It is more than 7 metres high It weighs about 6000 kg It was built more than 1600 years ago It has not rusted after such a long period

Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a:

Physical change that can be reversed

Chemical change that can be reversed

Physical change that cannot be reversed

Chemical change that cannot be reversed

The shipping industry has to bear huge financial loss because of rusting of ships. The rusting of ships occur because:

The body of ship is always in contact with water.

The air around the ship is humid.

Presence of salts in sea water speed up the process of rusting.

All of the above

A chemical change may bring

Evolution of gas

Change in colour

Change in taste

All of these

Neutralisation is a:

Physical change

Chemical change

Both (a) and (b)

None of these

The process of forming substances in their pure state from their solution is known as:

Galvanisation

Neutralisation

Crystallisation

All of these

Rusting can be prevented by:

Preventing iron from coming in contact with air and moisture by applying greese or paint

Deposit a layer of a metal like chromium or zinc on iron

Both (a) and (b)

None of these

The process of depositing a layer of zinc on iron is called:

Galvanisation

Neutralisation

Crystallisation

None of these

Ships suffer a lot of damage from rusting inspite of being painted because:

Sea water contains many salts

Sea water is bitter

Sea water is sour

Sea water is sweet

Quiz/Test Summary
Title: Physical and Chemical Changes: Rusting, Galvanization
Questions: 20
Contributed by:
Jonathan James