WhatsApp MR Beacon Chapterz 0546215469

1.Explain the following:

• (a) Saponification

• (b) micelle

• (c) Oils

• (d) Fats

• (e) Saturated Fatty acid

• (f) Unsaturated Fatty acid

2.Draw a structural formula for each of the following:

• (i) methyl methanoate

• (ii) 2- methyl butanoic acid

• (iii) diethylamine

• (iv) hexane -16- diamine

• (v)  benzene-1,4-dicarboxylic acid

3.  (a)Describe with the aid of equation and diagram how trioxonitrate(v) is prepared in the laboratory

4. (a)Define Allotropy

• (b) Name two allotropes of carbon. How it can be shown that they are different forms of the same elements?

• (c) Mention two processes by which carbon(iv)oxide is released into the atmosphere.

• (d) State two properties of carbon(iv) oxide which can make it suitable for use as extinguishers.

5.(a)Mention two types of coal

• (b) when coal is heated strongly in retorts in the absence of air, four main product are obtained.

• (I) what is the process describe above?

• (II) Name the four products formed.

• (III) State two uses for any two of the products.

6.(a)Explain why sulphur (iv)oxide is purified before it is passed into the catalyst chamber of the contact process.

• (b) Give one reaction in each case to show how tetraoxosulphate(vi) acid behaves as

• (I) an oxidizing agent

• (Ii) an acid

• (III) a dehydrating agent.

*Question*

a) Give the IUPAC names of each of the following substances.

i) SO32- .

ii) CuSO4.5H2O.

iii) KMnO4.

b) Define each of the following terms:

i) standard solution.

ii) saturated solution.

iii) standard enthalpy of formation.

c) A 250cm3 solution of K2Cr2O7 with concentration 0.025m0l dm-3 is to be prepared from a stock solution with concentration 0.04mol dm-3. Calculate the volume of the stock solution required.

d) Account for the following observations:

i) The enthalpy of neutralization between strong acids and strong bases is constant but that between weak acids and weak base varies and it also low.

ii) Washing down the acid or base splashed on the walls of a conical flask with a little distilled water during volumetric analysis does not have any effect on the titre values.