Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 General Science Chemistry Hydrocarbons

While burning hydrocarbon fuels, if we see a yellow flame with lots of black smoke, it means that the fuel is

I. made of saturated hydrocarbons.

II. made of unsaturated hydrocarbons.

1
I only
2
II only
3
Both I and II
4
Neither I nor II
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