NEET UG CHEMISTRY MCQ: HYDROCARBONS

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Understanding +4 | -1

A knocking sound is produced more in the engine when the fuel contains mainly:

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Correct option: A

n

-alkanes

Option A (

n

-alkanes) is correct because straight-chain alkanes (n-alkanes) have lower octane numbers and are more prone to causing knocking in engines compared to branched alkanes or aromatic compounds.

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The reaction of alkanes with halogen is explosive in the case of: A mixture of sodium benzoate and soda lime on heating produces The major product of the following reaction is

C{H_3}C \equiv CH\xrightarrow[{(ii)\;DI}]{{(i)\;DCl\;(1\;equiv.)}}

S-I : Heavy metal acetylides can be used to purify alkynes
S-II: Terminal alkynes form acetylides which are soluble in acids. Select the incorrect statement regarding A

C{H_3} - C \equiv CH + {H_2}OA

Kharasch effect is based on