Chemistry Past Questions and Answers

Kerosene is commonly used to remove the red colour stain of palm oil from cloth because it ____________

The gas that is the most dangerous pollutant to human is ____________

How many moles of limestone will be required to produce 5.6kg of CaO? <br/>[Ca = 4, C = 12, 0 = 16]

When air which contains the gases: oxygen, nitrogen, carbon dioxide, water vapour and the rare gases, is passed through alkaline pyrogallot and then over quicklime, the only gases left are:

When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as ____________