The octane number is associated with which petroleum product?

Give the uses of hydrocarbons with examples.

Which one of the following has the minimum boiling point?

$CH_3-CH(CH_3)-CH_3$ $\xrightarrow{KMnO_4} (A)$ $\xrightarrow[\Delta]{H^{+}} (B)$ $\xrightarrow[ROOR]{HBr} (C)$
Product $(C)$ in the above reactions is:

Give the isomers of $C_3H_6$ and their names.

Which of the following gases is poisonous?