Question

Which of the following is an example of decomposition reaction?

A) Carbon burns in oxygen to form carbon dioxide

B) Hydrogen combines with oxygen to form water

C) Iron on heating with sulphur forms Iron(II)sulphide

D) Limestone on heating forms calcium oxide and carbondioxide​

Answer 1

Answer:

Limestone on heating forms calcium oxide and carbon dioxide is a decomposition reaction since limestone is Ca(OH)₂​ which divides to form CaO and CO₂.

Explanation:

A decomposition reaction happens when one reactant breaks down to form two or more products. This can be represented using the equation:    

AB → A + B.

Examples of these reactions include the formation of water and oxygen from hydrogen peroxide and hydrogen and oxygen from water etc.

From the given options:

• Carbon burning in presence of oxygen to form carbon dioxide is an example of a combustion reaction.
• Hydrogen combined with oxygen to form water is an example of an addition reaction.
• Iron on heating with sulfur forms Iron(II)sulfide is also an example of an addition reaction.
• Limestone on heating forms calcium oxide and carbon dioxide is a decomposition reaction since limestone is Ca(OH)₂​ which divides to form CaO and CO₂.

Answer 2

QUESTION :

• Which of the following is an example of decomposition reaction?

• A) Carbon burns in oxygen to form carbon dioxide

• B) Hydrogen combines with oxygen to form water

• C) Iron on heating with sulphur forms Iron(II)sulphide

• D) Limestone on heating forms calcium oxide and carbondioxide

ANSWER :

Limestone on heating forms calcium

oxide and carbondioxide option D is correct

• doing to do decomposition Reaction
• it will do it with the help of equation AB → A + B

decomposition of hydrogen peroxide equation

we have :

1. 2 H2O2 → 2

2. H2O + O2