Chemistry Past Questions and Answers

Which of the following are mixtures? <br/>i, Petroleum <br/>ii, Rubber latex <br/>iii. Vulcanizer's solution <br/>iv, Carbon (II)sulphide

An iron ore is known to contain 70.0% Fe<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>3</sub>. The obtain from 80kg of the ore is?<br/>(Fe = 56, O = 16)

In two separate experiments, 0.36g and 0.71g of chlorine combined with a metal X to give Y and Z respectively. An analysis showed that Y and Z contain 0.20g and 0.40g of X respectively. The data above represents the law of ?

30cm\(^3\) of oxygen at 10 atmospheres pressure is placed in a 20 cm\(^3\) container. Calculate the new pressure if temperature is kept constant?

Calculate the volume of carbon (IV)oxide measured at s.t.p, produced when 1 kg of potassium hydrogen trioxocarbonate (IV) is totally decomposed by heat?<br/>(G.M.V. at s.t.p 22.4 dm<sup style='font-size: smaller;'>3</sup>, K = 39, O = 16, C = 12, H = 1)