1. a. State the atomic orbital which:
i. Has a dumb-bell shape
ii. Can contain a maximum often electronic
b. (i) list three types of radiation that can be emitted by a radioactive substance
(ii) Which isotope of carbon is used in radioactive dating?
2. (a) What is the shape of a molecule of:
(i) Carbon (iv) oxide (ii) methane?
(b). State the type of chemical bond between:
i. Nitrogen atoms in a nitrogen molecule
ii. Hydrogen ion and ammonia in ammonium ion
iii. Aluminum atoms in sheet of aluminum
3. (a) list three processes involved in the treatment of water for town supply.
(b) state two disadvantages of hard water
4. (a) Define reduction in terms of change in oxidation number
(b) What are the values of x and y in the following equation

5. a) . (i) What is the upper limit of the pH scale?
(ii) List two uses of Concentrated trioxonitrate (v) acid
b. Classify each of the following as acidic oxide/basic oxide/neurtal oxide
i. Carbon (ii) oxide
ii. iron (iii) oxide
6. (a) Name the process used for the commercial production of:
i. nitrogen (ii) tetraozosulpahte (vi) acid
b. State the type of reaction involved in each of the following

7. (a) i. What are electrolytes? (ii) State the products of electrolysis of concentrated sodium hydroxide solution using platinium electrodes.
(b) Give one example of a metal that is extracted from its ore by electrolysis
8. (a) i. List types of reaction which alkene undergoes?
ii. What is IUPAC name of a compound with the following structure?

(b). i. Write an equation to show how ethane can be obtained from ethanol
9. (a) Mention two gases which are burnt with oxygen respectively to generate hot flame
(b) Determine the number of molecules 10g of Oxygen gas (O =16, Avogadro Constant =
6. 02 x1023)
10. a. State whether the entropy change for each of the following is positive or negative

b. What is the effect of each of the following on the equilibrium position of the system indicated below?

i. Cooling the system ii. Removing C as soon as it is formed

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