The rusting of an iron object is called :
(a) corrosion and it is a physical as well as a chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change

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Solution

(c) corrosion and it is a chemical change
Rusting of iron takes place in the presence of air (O2) and water vapour. Action of air and moisture on iron converts it to its oxide. This process is called corrosion and it leads to the formation of a new compound. Therefore, it is a chemical change.

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The rusting of an iron object is called:

(a) corrosion and it is a physical as well as a chemical change

(b) dissolution and it is a physical change

(d) dissolution and it is a chemical change

Q. Question 2
Rusting of an article made up of iron is called

(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change

Q. Dissolution of salt in water is a ______ (physical/chemical) change.

So, rusting of iron is a chemical change or physical change???

Burning of a candle is a chemical as well as physical change, why?

1. The physical change occurs when the wax of candle melts and it loses its shape
2. The chemical change is combustion of fuel in presence of oxygen. This leads to the production and emission of carbon dioxide from the flame
3. The burning of a candle is only a chemical change
4. The burning of a candle is only a physical change

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The rusting of an iron object is called : (a) corrosion and it is a physical as well as a chemical change (b) dissolution and it is a physical change (c) corrosion and it is a chemical change (d) dissolution and it is a chemical change

(c) corrosion and it is a chemical change Rusting of iron takes place in the presence of air (O2) and water vapour. Action of air and moisture on iron converts it to its oxide. This process is called corrosion and it leads to the formation of a new compound. Therefore, it is a chemical change.

The rusting of an iron object is called :
(a) corrosion and it is a physical as well as a chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change

(c) corrosion and it is a chemical change
Rusting of iron takes place in the presence of air (O2) and water vapour. Action of air and moisture on iron converts it to its oxide. This process is called corrosion and it leads to the formation of a new compound. Therefore, it is a chemical change.