Question

Explain how painting of an iron gate prevents it from rusting.

Solution

Rusting is aided by both moisture (water) and air (oxygen). By painting an iron gate, we prevent its contact from the air and moisture present in the atmosphere. Hence, rusting is prevented.

Some More Questions From Physical and Chemical Changes Chapter

Explain why burning of wood and cutting it into small piece are considered as two different types of changes.

Describe how crystals of copper sulphate are prepared.

Explain how painting of an iron gate prevents it from rusting.

Explain why rusting of iron objects is faster in coastal areas than in deserts.

The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A) then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
(i) Process − A is a chemical change.
(ii) Process − B is a chemical change.
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change.

Anaerobic bacteria digest animal waste and produce biogas (Change − A).
The biogas is then burnt as fuel (Change − B). The following statements pertain to these changes. Choose the correct one.

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Physical And Chemical Changes

Explain how painting of an iron gate prevents it from rusting.

Some More Questions From Physical and Chemical Changes Chapter

Explain why burning of wood and cutting it into small piece are considered as two different types of changes.

Describe how crystals of copper sulphate are prepared.

Explain how painting of an iron gate prevents it from rusting.

Explain why rusting of iron objects is faster in coastal areas than in deserts.

Anaerobic bacteria digest animal waste and produce biogas (Change − A).
The biogas is then burnt as fuel (Change − B). The following statements pertain to these changes. Choose the correct one.

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For Daily Free Study Material Join wiredfaculty

Physical And Chemical Changes

Explain how painting of an iron gate prevents it from rusting.

Some More Questions From Physical and Chemical Changes Chapter

Explain why burning of wood and cutting it into small piece are considered as two different types of changes.

Describe how crystals of copper sulphate are prepared.

Explain how painting of an iron gate prevents it from rusting.

Explain why rusting of iron objects is faster in coastal areas than in deserts.

Anaerobic bacteria digest animal waste and produce biogas (Change − A).The biogas is then burnt as fuel (Change − B). The following statements pertain to these changes. Choose the correct one.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Anaerobic bacteria digest animal waste and produce biogas (Change − A).
The biogas is then burnt as fuel (Change − B). The following statements pertain to these changes. Choose the correct one.