Organic Chemistry

The correct option is (B): CHO.

The correct option is (C): .

In ethyne (C2H2), there are two sigma bonds (one from each C-H and C-C bond) and two pi bonds (one from the overlap of p orbitals of the two carbon atoms).

The structure CH3–C–CH3 represents acetone, which is a ketone. A ketone contains a carbonyl group (C=O) bonded to two carbon atoms.

Alkanes are hydrocarbons that contain only single bonds between carbon atoms. They are saturated hydrocarbons.

When the hydrogen atom in the carboxyl group (-COOH) is replaced by an alkyl group ('R'), esters are formed. Esters have the general formula R-COO-R.

Fermentation is the process through which sugars and starches are converted to ethanol (C2H5OH) by microorganisms, typically yeast, in the absence of oxygen.

An unsaturated compound contains one or more double or triple bonds between carbon atoms. In this case, CH3 - CH = CH2 is an unsaturated compound because it contains a double bond.

When methane reacts with chlorine in the presence of sunlight, chloromethane (CH3Cl) is formed as a result of a substitution reaction.