Which of the following happens when a wax candle is burnt?
A. Wax undergoes oxidation.
B. Heat and light energy are released.
C. Water vapour and carbon dioxide are released.

A and B only

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B and C only

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C and A only

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A, B and C

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Solution

The correct option is D A, B and C
Candle wax is a carbon-based compound derived from petroleum. During combustion, the wax burns to give heat and light in addition to carbon-dioxide and water released in the form of steam. Since combustion is a reaction where the wax reacts with oxygen, it can be said that the fuel is getting oxidised.

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(d) Both B and D are correct.

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Which of the following happens when a wax candle is burnt? A. Wax undergoes oxidation. B. Heat and light energy are released. C. Water vapour and carbon dioxide are released.

Which of the following happens when a wax candle is burnt?
A. Wax undergoes oxidation.
B. Heat and light energy are released.
C. Water vapour and carbon dioxide are released.