JAMB Past Questions and Answers - Page 1738

The choice of straight hydrocarbon chains primarily serves the purpose of enhancing the biodegradability of the detergent, making it less harmful to the environment once it is washed away.Since unbranched (i.e., straight) chains are more prone to attack by bacteria, therefore in most of the detergents used these days, the branching is kept to be minimum so that the detergents become easily biodegradable.

Polyvinyl chloride is used in the production of pipes. Polyvinyl chloride (PVC) is an odorless and solid plastic. It is most commonly white but can also be colorless or amber. It can also come in the form of white powder or pellets. PVC is made from vinyl chloride. The chemical formula for vinyl chloride is \(C_2H_3Cl\)

When a mixture of benzene vapour and hydrogen are passed over a nickel catalyst at 180ºc cyclohexane will be produced

Reduction of alkanones with \(LiAlH_4\) produces secondary alkanols.

The League of Nations was the first intergovernmental organization that was established after World War 1 in order to try and maintain peace. It was headquartered in Geneva, Switzerland and designed to be a forum for handling international disputes before they flared up into military action and caused domino effects that pulled ally nations into the conflict (as had happened with the Great War). Unfortunately, the League failed miserably in its intended goal: to prevent another world war from happening (WW2 broke out only two decades later).

The idea was for the League of Nations to prevent wars through disarmament, collective security, and negotiation. It was also involved in other issues such as drug trafficking, arms trade, and global health. Although the League disbanded during WW2, it was replaced with the United Nations, which is still going strong today.