One of the following organic compounds cannot decolourise the red-brown colour of bromine water. This compound is :
(a) C14H28 (b) C7H12 (c) C6H14 (d) C9H16
C6H14 is an alkane as its formula can be expressed as CnH2n+2. Alkanes are stable and cannot decolourize reddish-brown bromine water in the absence of a catalyst.