Q: While burning hydrocarbon fuels, if we see a yellow flame with lots of black smoke, it means that the fuel is:
(a)made of saturated hydrocarbons.
(b)made of unsaturated hydrocarbons.
(c)burning completely.
(d)wet.
Correct Answer: (b)
The correct answer is (c) 'पूर्ण रूप से जल रहा है।'. This question from the General Studies domain tests knowledge of Miscellaneous.