By adding tetraethyl lead to iso-octane: A.  Exhaust smoke can be reduced B.  Knocking can be completely suppressed C.  Octane number above 100 can be obtained D.  Specific fuel consumption can be reduced

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Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.