Which statement is not true concerning alkanes?

Which of the following reactions will not give propane?

Which hydrocarbon is produced when sodium propionate is heated with sodalime?

The number of shared pairs of electrons in propane is

The octane number of $2, 2, 3-$trimethylbutane is considered to be ............ .

Consider the isomers of the hydrocarbon with molecular formula $C_5H_{10}$. These isomers do not decolourise $KMnO_4$ solution. These isomers are subjected to chlorination with chlorine in the presence of light to give monochloro compounds. The total number of monochloro compounds (structural isomers only) formed from all these isomers is . . . . . . .