1.

Which of the following conditions is necessary for combustion : (A) Presence of a combustible substance (B) Presence of oxygen (C) Heating the combustible substance to its ignition temperature (D) All the above 

Answer»

Correct option (D) All the above

Explanation:

All the three conditions are Necessary for combustion that are like : 

1. Presence of combustible substance 

2. Presence of oxygen 

3. Heating the combustible substance to its ignition temperature



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