Chemistry Past Questions and Answers

Which of the following groups contains entirely linear molecules?

What is the value of n in the following equation? XO-₄ +8H ⁺ + ne- → X^{2 +} + 4H₂O

A dye is suspected to have contaminated a lollipop. Which of the following is the best method by which the contaminant may be isolated?

Which of the following accounts for the difference in the mode of conduction of electricity by metals and aqueous salt solutions?

(a) State the method of collecting gases which are denser than air.
(b) Name two gases that can be used to perform the fountain experiment in the laboratory. State the physical property which makes it suitable for the experiment.