(a) When is a sample of water said to be hard? (b) State one difference between temporary and permanent hardness of water (c) Give one method of removing ha...

(a) The half-life of 56/25 Mn is 9.3 x 10\(^3\)S. What does the statement mean? (b) Give the three types of radiation that are usually emitted by radioactive...

(a) Write the formula of the oxide of nitrogen in which nitrogen has oxidation number of (i) +1; (ii) +2; (iii) +3; (iv) +4; (b) State which of the oxides in...

(a) Give one physical property of (i) diamond; (ii) graphite (b) Give two uses of diamond (c) evidence that shows that both graphite and diamond are allotrop...

Consider the compounds represented as A and B below: (a) What is the celationship between A and B? ( b) Name A and B. (c) Will the chemical properties of A a...

Name the type of chemical process involved in the production of (a) polythene from ethene (b) ethene from kerosene fraction of petroleum. (c) soap from veget...

(a) Write the chemical equation for the formation of named alkanoate. (b)(i) What are the monomers of protein called? (ii) Write the two functional groups pr...

(a) Give two characteristic features of boiling (b) What will be the effect of the following on the boiling point of water: (i) addition of crystals of sodiu...

(a) Name the gas evolved when dilute hydrochloric acid is added to each of the following solids and the mixture is warmed (i) sodium trioxocarbonate (IV); (i...