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.

The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide.

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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

Rusting of iron is both chemical and physical change . Why?

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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. The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide.

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.

The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide.