5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is :

An organic compound contains C, H and S. The minimum molecular weight of the compound containing 8% sulphur is :

(atomic weight of S = 32 amu)

The hydrocarbon with seven carbon atoms containing a neopentyl and a vinyl group is :

Which one of the following species is stable in aqueous solution?