(a) State three reasons why air is classified as a mixture. (b) List two methods that can be used to separate a mixture of iodine crystals and iron filings.

(a)(i) Explain the term pH (ii) If sodium hydroxide solution were added to a solution of a strong acid, what would happen to the pH of the solution? (b) Give...

(a)(i) Sketch a graph to illustrate Charles' law. (ii) A gas occupies 500 cm\(^{ 3}\) at 2TC. calculate its volume at 40°C constant pressure. (b) List two ga...

(a) Name the device used for producing an electric current from a chemical (b) Copy and complete the table below. Electrolyte Product at the anode (carbon) P...

(a) Mention one process apart from respiration, which increases the amount of carbon (IV) oxide in the atmosphere. (b)(i) State one use of sodium hydrogentri...

(a) What is the change in oxidation state of chromium in the reaction represented by the following equation? 3SO\(_2\) + Cr\(_2\)O\(^2_{-7}\) + 2H\(^+\) -> 3...

(a) State the type of reaction involved in the conversion of: (i) proteins.to amino acids: (ii) ethanol to ethene; (iii) benzene to bromobenzene (b) Write an...

(a) Mention the chemical substance manufactured starting from each of the foirownc sets of materials: (i) sugar and yeast; (ii) ammonia, air and water; (iii)...

What name is given to each of the following? The (a) irregular random movement of smoke particles in air. (b) existence of an element in various forms in the...