Rubber monomers, condition for production of rubber, Vulcanization of rubber- physical chemistry

08/17/2020 0

Rubber Monomers Important conjugated dienes used in synthetic rubbers include isoprene (2-methyl-1,3-butadiene), 1,3-butadiene, and chloroprene (2-chloro-1,3-butadiene).   Condition for the reaction leading to formation of ... Read More

Properties of Gama, beta and alpha particles

08/17/2020 2

Types of radiations There are three types of radiations given by radioactive substances. They all cause certain substances, such as zinc sulphide, to luminesce, and ... Read More

Properties of Gama particle -physical chemistry

08/17/2020 2

properties of gamma particles These uncharged rays are similar to X-rays they have high penetrating power; being able to pass through 0.1m of metal. have ... Read More

Properties of beta particles-physical properties

08/17/2020 0

Properties of beta particle negatively charged deflected toward positive electric field have medium penetrating power ionize gases they pass through Sponsored by The Science Foundation ... Read More

Properties of Alpha particles-physical chemistry

08/17/2020 0

Properties alpha particles positively charged helium ions ionize gases they pass through deflected towards negative electric field have low penetrating power Read More

Methods of separating azeotropic mixture – physical chemistry

08/17/2020 1

Adding a substance that reacts and removes one component. e.g. CaO reacts and removes water from azeotrope of ethanol and water distillation with a third ... Read More

Reasons why azeotropes are not compounds- physical chemistry

08/17/2020 0

Azeotropes are not compounds because they can be separated by physical means such as adsorption, fractional crystallization components react independently for example water in rectified ... Read More

Ratios – upper primary mathematics

08/03/2020 0

Ratio A ratio indicates how many times one number contains another. For example, if there are eight oranges and six lemons in a bowl of fruit, then ... Read More

Currency exchange-primary mathematics

08/02/2020 2

Currency exchange Banks and forex bureau buy and sell currencies of different cuntries at rate different rates according to their values. To make profit, they ... Read More

Lowest Common Multiple (LCM) and Greatest Common Factor (GCF) – primary mathematics

08/01/2020 1

Lowest common multiple (LCM) The Least Common Multiple (LCM) is also referred to as the Lowest Common Multiple (LCM) and Least Common Divisor (LCD). For ... Read More

Trading, profit, loss, discount and shopping – primary mathematics

08/01/2020 0

Trading A trader is a person who buys commodities  and sells them at a profit. The profit is the difference between the selling and cost ... Read More