Question

47. Which of the following is non-Combustible gas ?
(1) Hydrogen
(2) L.P.G.
(3) C.N.G.
(4) Oxygen
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Answer 1

Answer:

The correct answer of this question is option 4, oxygen.

Explanation:

For the combustion of any combustible material,oxygen is necessary.Because, oxidation of the combustible materials are necessary for the combustion and for that purpose oxygen acts as an oxydizing agent.

But the oxygen itself is not combustible in any condition or circumstances.

That's why the correct answer of this question is option 4,oxygen.

Answer 2

Oxygen is a non-combustible gas.

Option (4) is correct.

Explanation:

• A combustion reaction is a redox reaction that takes place at high temperature and atmospheric oxygen
• For the combustion reaction, the presence of oxygen is necessary.
• A combustion reaction is carried out in the presence of O2.
• For example,
• CH4 + O2 ----> CO2 + H2O
• The burning of methane in the presence of oxygen is a combustion reaction.