Question

A jar filled with oxygen gas is given. Using which physical property can it be proved that it is oxygen?

• A. Smells sweet
• B. Tastes bitter
• C. Yellow in colour
• D. Candle burns more brightly

Answer 1

The correct option is D

Candle burns more brightly

Oxygen gas is colourless, odourless, and tasteless gas. Hence, you can't smell or taste or see to test the presence of oxygen.

But if you take a candle flame and you notice that it burns brighter and stronger, you can be sure it's oxygen.