A sample of gas is to be identified by means of its behaviour in the presence of a glowing splint. Which of the following gases will neither itself burn nor cause the splint to bum?

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Q: 29 (NDA-II/2014)
A sample of gas is to be identified by means of its behaviour in the presence of a glowing splint. Which of the following gases will neither itself burn nor cause the splint to bum?

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,10,18,9,10,6,3

keywords: 

{'gases': [0, 0, 5, 12], 'gas': [9, 1, 9, 27], 'methane': [0, 0, 0, 5], 'glowing splint': [0, 0, 0, 1], 'oxygen': [3, 0, 1, 0], 'nitrogen': [1, 1, 0, 2], 'hydrogen': [0, 0, 1, 3], 'splint': [0, 0, 0, 1], 'sample': [0, 0, 3, 5], 'bum': [0, 0, 0, 1]}

Option 1: Oxygen

Oxygen is a gas that supports combustion. It itself does not burn, but it enhances the burning of other substances. So, if oxygen is present, the splint will burn even more vigorously.

Option 2: Nitrogen (Correct Answer)

Nitrogen is an inert gas and does not readily react with other substances. It neither burns nor supports combustion. Therefore, if nitrogen is present, the splint will not burn and there will be no change in its behavior.

Option 3: Hydrogen

Hydrogen is highly flammable and burns easily in the presence of an ignition source, such as a flame or a spark. So, if hydrogen is present, it will burn and cause the splint to burn as well.

Option 4: Methane

Methane is a combustible gas that burns readily in the presence of an ignition source. If methane is present, it will burn and cause the splint to burn as well.

In conclusion, the correct answer is Option 2: Nitrogen. Nitrogen is an inert gas that neither burns nor causes the splint to burn.