(a) Give two reasons why carbon(IV) oxide is used for extinguishing fire (b) Explain briefly the water softening action of cation exchane resins.

Benzene contains six carbon atoms and six hydrogen atoms. (a)(i) Draw two stable structures of benzene to show how these atoms are arranged. (ii) What is the...

(a) Balance the nuclear equation below and hence identify Y. \(^{238}_{234}U \to ^{234}_{92}Th + Y\) (b) In.a tabular form, state two of the observations in ...

(a) Arrange the first three members of the halogen family in their increasing order of electronegativity. Give the reason for your answer. (b) State and expl...

(a) Give the formula indicating the relationship between entropy, free energy and enthalpy changes of a system. (b) For each of the following, state whether ...

(a) Give one reason why a collision between reactants may not produce new species. (b) Explain, illustrating with appropriate equation(s), why an aqueous sol...

(a) Write the electronic configuration of an element with atomic number 15, indicating the distribution of electrons in the energy sub-levels (b) Give the fo...

(a) Name the type of solid structure possessed by: (i) diamond; (ii) iodine; (iii) sodium chloride. (b) Give: (i) one alloy of tin: (ii) a common reducing ag...

A hydrocarbon X which decolorizes bromine water but has no action on ammoniacal silver trioxonitrate (V) solution was found to have a molar mass of 58 g mol\...