Chemistry Questions and Answers

Ethene is the most important organic chemical, by weight, that is manufactured. It is an important raw material for the production of plastics and antifreeze solutions as well as solvents.

CFCs (Chlorofluorocarbons) have a lifetime in the atmosphere of about 20 to 100 years, and consequently one free chlorine atom from a CFC molecule can do a lot of damage, destroying ozone molecules for a long time

Distillation is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation.

permutit water softener can be regenerated by washing the spent resin with brine( saturated sodium chloride solution). The solution ions replace the calcium or magnesium ions present in it.

$CaR_{2(s)}$ + 2$NaCl_{aq}$  → $CaCl_{2(aq)}$ + 2$NaR_{2(s)}$

Between the five main minerals found in clay, kaolinite is the most common. Kaolinite holds the chemical composition Al$_{2}$ Si$_{2}$O$_{5}$(OH)$_{4}$ and is an aluminum silicate material with a low “shrink-swell” capacity. It is a soft, white mineral but is often colored orange or red by iron oxide found in the soil.