(a) (i) What is diffusion?

(ii) State Charles' law:

(iii) Sketch a graph to illustrate Charles' law.

(iv) A given mass of a gas occupied 150 cm3 at 27 °C and a pressure of 1.013 x 105 Nm\(^{-2}\). Calculate the temperature at which its volume will be doubled at the same pressure.

(v) Arrange the three states of matter in order of increasing: (i) kinetic energy; (ii) forces of cohesion.

(b) (i) State Le Chatelier's principle. (ii) A metal M forms two oxides containing 11.1% and 20.0% of oxygen. Show that these figures agree with the law of multiple proportion.

(c) The table below shows the physical properties of substances A, B and C.

(i) If A and B are miscible when melted and B and C react when heated, describe how a mixture of A, B, and C could be separated.

(ii) When 25.25g of the mixture A, B and C was separated, 7.52 g of A and 8.48 g of B were recovered. Assuming i there was no loss of components during separation, calculate the percentage by mass of C in the mixture

(a) (i) Define nuclear fission.

(ii) A certain natural decay series starts with \(^{238}_{92}U\) and ends with\(^{230}_{90}Th\). Each step involves the loss of an alpha or a beta particle. Using the given information, deduce how many alpha beta particpes were emitted.

(b) Consider the equilibrium reaction represented by the following equation:

A\(_{2(9)}\) + 3B\(_{2(9)}\) \(\rightleftharpoons\) 2AB\(_{3(g)}\); \(\Delta\)H = + xkJmol\(^{-1}\)

Explain briefly the effect of each of the following changes on the equilibrium composition: (i) increase in concentrat of B; (ii) decrease in pressure of the system; (iii) addition of catalyst.

(c) The lattice energies of three sodium halides are as follows:

Explain briefly the trend.

(d) State the property exhibited by nitrogen (IV) oxide in each of the following reactions:

(i) 4Cu + 2NO\(_2\) \(\to\)  4CuO + N\(_2\);

(ii) H\(_2\)O +  2NO\(_2\) \(\to\) HNO\(_3\) + HNO\(_2\).

(e) Iron is manufacturcd in a blast furnace using iron ore (Fe\(_2\)O\(_3\)), coke and limestone. Write the equation for the reaction(s) at the: (i) top of the furnace; (ii) middle of the furnace; (iii) bottom of the furnace.

(f) (i) Name two products of destructive distillation of coal. (ii) Give one use of each product in (f)(i).

(a) (i) What is a structural isomer?

(ii) Write all the structural isomeric alkanols with the molecular formula C\(_4\)H\(_{10}\)O.

(iii) Which of the isomers from (a)(ii) above does not react easily on heating with acidified K\(_2\)Cr\(_2\)O\(_7\)?

(b) Chlorine reacted with excessentane in the presence of light. Chloropentane and a gas which fumes on cont with air were produced.

(i) Write an equation for the reaction.

(ii) Draw the structure of the major product.

(iii) What is the role of light in the reaction?

(iv) If a mixture of pentane and the major product is heated, which compounc would distil off first? Give a reason for your answer.

(v) Write the formula of the main product that would have be formed if but -1-ene has been used instead of pentane.

(c) Give the name and structural formula of the product which would be formed by hydration of each of the followinc compounds:

(i) CH\(_3\)CH(CH\(_3\))CH=CH\(_2\); (ii) CH\(_2\)=CHCOOH.

(d) (i) Write the structure of the amino acid, CH\(_3\)CH(NH\(_2\))COOH in: I. acidic medium; II. alkaline medium.

(ii) On analysis, an ammonium salt cf an alkanoic acid gave 60.5% carbon and 6.5% hydrogen. If 0.309 g of the salt yielded 0.0313 g of nitrogen, determine the empirical formula cf the salt. [H = 1.00; C =12.0; N =14.0; O = 16.0]

 (a) (i) Define standard electrode potential.

(ii) State two factors that affect the value of standard electrode potential.

(iii) Give two uses of the values of standard electrode potential.

(iv) Draw and label a diagram for an electrochemic cell made up of Cu\(^{2+}\)/Cu; E° = +0.34 V  Zn\(^{2+}\)/Zn; E° = -0.76 V

(v) Calculate the e.m.f. of the cell in (a)(iv) above.

(b) (i) In terms of electron transfer, define: I. oxidation; II. oxidizing agent.

(ii) Balance the following redox reaction: MnO\(^{-4}\) + l\(^{-}\) \(\to\) l\(_{2}\) + Mn\(^{2+}\)

(c) Classiify each of the following oxides as basic, amphoteric, acidic or neutral: (i) Carbon (II) oxide; (ii) Sulphu (IV) oxide; (iii) Aluminium oxide; (iv) Lithium oxide.

(d) What is hydrogen bonding?

 (a) Define each of the following terms: I. biotechnology; II. biogas.

(ii) State two applications of biotechnology

(b) (i) Describe briefly the production of ethanol from sugar cane juice.

(ii) State the by-product of the process in (b)(i)

(iii) Mention two uses of the by-product.

(iv) Ethanol can be produced from both cane sugar and petroleum. Explain briefly why the ethanol from cane sugar is renewable but that from petroleum is non-renewable.

(c) Distinguish between heavy chemicals and fine chemicals. Give one example of each chemical.

(d) Arrange the following gases in increasing order of deviation from ideal gas behaviour: HCl; O\(_2\); Cl\(_2\). Give reason(s) for your answer.