Question

Which of the following does not involve a combustion reaction?
A. production of heat and light from kerosene in a rocket
B. production of heat and light from hydrogen in a rocket.
C. production of heat and light from hydrogen in the sun
D. production of heat and light from wood in a bonfire.

Answer 1

Answer:

C

Explanation:

In the sun the heat is generated due to nuclear fusion not combustion

Answer 2

C. production of heat and light from hydrogen in the sun

Explanation:

The Sun produces light and heat by a nuclear reaction called fusion. As atoms of hydrogen combine to form helium, they produce vast amounts of heat and light. There is no combustion involved here.

Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant. Burning happens in the case of kerosene, wood and rocket fuel.

So, Option C is the answer.