Chemistry Past Questions and Answers

A sample of temporary hard water can be prepared in the laboratory by?

A property of a colloidal dispersion which a solution does not have is?

50 cm<sup style='font-size: smaller;'>3</sup> of sulphur (IV) oxide, 800 cm<sup style='font-size: smaller;'>3</sup> of ammonia, 450 cm<sup style='font-size: smaller;'>3</sup> of hydrogen chloride, 1.0 cm<sup style='font-size: smaller;'>3</sup> of at 15°C. Which of the following is suitable for demonstrating the fountain experiment?

How many structural isomers can be written for the alkyl bromide, C<sub style='font-size: smaller;'>4</sub>H<sub style='font-size: smaller;'>9</sub>Br?

What volume of CO<sub style='font-size: smaller;'>2</sub> at s.t.p would be obtained by reacting trioxocarbonate (IV) with excess acid?<br/>(G.M.V at s.t.p = 22.4 dm<sup style='font-size: smaller;'>3</sup>)