A compound X is a six carbon compound. When it is burnt, light is generated. Here the color of the flame is yellow because of the presence of carbon particles. Compound X cannot be____.

A compound X is a six-carbon compound. When it is burnt, light is generated. Here the color of the flame is yellow because of the presence of carbon particles. 

Compound X cannot be $C_6{H}_{14}$.

• $C_6{H}_{14}$ is a saturated hydrocarbon as it has only single bonds like alkanes. 
• The characteristic property of alkanes is that they produce blue light when they are completely burned. 
• When the alkenes are not completely burned then they release a yellow and sooty flame. So compound X cannot be an alkane as they burn with a blue flame.