(a) Methane reacts with chlorine under certain condition to produce tetrachloromethane.

(i) State the condition for the reaction

(ii) Name the type of reaction

(iii) Give two uses of methane

(iv) Name one major natural source of methane

(b)(i) Mention one similarity between the reaction of ethanol with sodium and that of sodium with water

(ii) Write the structure of two isomers of C\(_3\)H\(_8\)O

(iii) Differentiate between a fine chemical and a heavy chemical

(iv) Give one example of each in (b)(iii) above

(c) Two compounds X and Y have the same percentage composition by mass of 92.3% carbon and 7.7% hydrogen. Calculate the:

(i) empirical formula of X and Y;

(ii) molecular formula of each compound if molar mass of X is 26 g and Y is 78g.

(d) A protein is boiled for a long time with dilute HCI and a reaction occurred.

(i) State the type of reaction that occurred

(ii) Name the major product formed

(iii) Give the functional groups present in (d)(ii) above.

What is the value of n in the following equation? Cr₂O7^2- + 14H⁺ + ne^-→ 2Cr³⁺+ 7H₂O

• A. 2
• B. 3
• C. 6
• D. 7

The region around the nucleus where electrons can be located is called?

• A. a spectra
• B. an orbital
• C. a quanta
• D. a field

Which of the following is true concerning the properties of benzene and hexane?

• A. Both undergo substitution reaction
• B. Both undergo addition reaction
• C. Both are solids
• D. Both can decolourized bromine water

If sulphur is dissolved in carbon (IV) sulphide and the solution is allowed to evaporate the allotrope of sulphur formed is

• A. plastic sulphur
• B. amorphous sulphur
• C. rhombic sulphur
• D. monoclinc sulphur

Which of these elements has the highest first ionization energy?

• A) Rb
• B) Li
• C) Na
• D) K

The products of the electrolysis of dilute sodium chloride solution with platinum electrodes are

• A) hydrogen and oxygen
• B) oxygen and chlorine
• C) chlorine and water
• D) sodium amalgam and chlorine

Which of the following types of bonding does not involve the formation of new substance?

• A. Metallic
• B. covalent
• C. Co-ordinate
• D. Electrovalent

The number of orbitals in a p-sub level of an atom is

• A. 2
• B. 3
• C. 5
• D. 6

A burning candle produces water and

• A. Carbon (II) oxide
• B. Carbon (IV) oxide
• C. Oxygen
• D. Hydrogen