Everything Organic Trivia Quiz

Answer: Alkenes

Alkenes are able to display geometrical isomerism as they contain a carbon-carbon double bond. Alcohols, carboxylic acids and alkanes do not share this trait.

Geometrical isomerism refers to the carbon to carbon double bond having four attachments that can not be rotated around it. If both of a certain kind of attachment are attached on the same side, it is referred to as a "cis" isomer whereas if both of the certain kind of attachments are bonded on opposite sides of a double bond, it is referred to as a "trans" isomer.

Answer: Bromine water remains red-brown

Alkanes do not react with bromine water, so, the bromine water remains red-brown.

However, alkenes and alkanes undergo addition reaction, changing the red-brown bromine water to colourless. Alkynes decolourise bromine water faster than alkenes.

Answer: Hydration

Dehydration removes water molecules from alcohol to produce an alkene.

Alcohols usually undergo oxidation to produce carboxylic acids. Alkenes undergo oxidation to produce aldehydes and ketones.

Hydration is generally known as the addition of water molecules. When water is added to an alkene, it produces an alcohol. Upon oxidation of an alkane, a hydroxyl functional group is formed. This hydroxyl functional group is characteristic of an alcohol.

Alkenes do not undergo substitution reaction.

Answer: Hydrogen

This reaction is an addition reaction, known as hydrogenation. Hydrogen is added onto the double bonds of the alkenes and the end product is an alkane.

Answer: Carbon dioxide

In the production of ethanol, yeast is a necessity as it contains enzymes which play an integral role. In the first step, sucrose (cane sugar) is hydrolysed under the action of the enzyme invertase to produce glucose and fructose.

Then, glucose and fructose ferment under the action of the enzyme zymase to produce carbon dioxide and ethanol.

In the next step, about 96 percent of ethanol is obtained through fractional distillation.

Answer: Copper chloride

Ethene molecules undergo hydrogenation to form 1,2-dichloroethane.

These then react under specific conditions to form vinyl chloride and HCl (hydrochloric acid)

Hydrochloric acid is removed by dissolving and draining the solution as it soluble.

The vinyl chloride molecules then undergo polymerisation to form polyvinyl chloride (PVC) under the action of the catalyst copper chloride.

Answer: A ketone

Primary alcohols undergo oxidation creating an aldehyde and readily oxidise further to form a carboxylic acid.

Secondary alcohols oxidise to form a ketone. A ketone does not oxidise any further.

Tertiary alcohols do not undergo the process of oxidation.

Answer: it is highly flammable

Alcohols are volatile and highly flammable. Heating them directly will result in an explosion.

Answer: Functional groups

A functional group is something all molecules of that family will have. For example, -OH is the functional group of an alcohol. The functional group is the part of the molecule that is responsible for the chemical properties of the molecule, so it is the part of the molecule that participates in chemical reactions.

Answer: Hydrohalogenation

Hydrohalogenation is the addition of a hydrogen halide onto an alkene or an alkyne. A hydrogen halide is a compound that consists of a hydrogen and a halogen (Group 7 elements such as chlorine, bromine or fluorine) bonded together.