(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...

Magnesium ribbon reacts with dilute hydrochloric acid at room temperature. (a) State three ways by which the reaction can be made to proceed faster (b) Write...

(a) Give one example of naturally-occurring acids (b) If 0.5 mole of a mono-alkanoic acid weighs 44g, determine the molecular formula and the name of the aci...

(a) Name the crystalline allotrope of sulphur that is stable at room temperature. (b)(i) Give one example of a fuel that contains significant amount of sulph...

(a) Give the electrolyte of a named secondary electrochemical cell. (b) Consider the cell represented as shown below: \(Cu_{(s)}Cu^{2+}_{(aq)}/Zn^{2+}_{(aq)}...

(a) What is meant by the term acid salt? Give one example. (b) State the reason why an all-glass apparatus must be used for the laboratory preparation of con...

(a) Three elements A, B and C have atomic numbers 8, 11 and 12 respectively. (i) Write the formula of the compound formed by the chemical combination of A an...

(a) State the main ore of tin. (b) Write an equation for the reaction involved in the smelting of purified tin ore (c) List two alloys of tin

(a) Name one metal in each case Which: (i) exists as a liquid at room temperature, (ii) can be found in nature in the uncombined state (b) X and Y are 0.5 mo...