Which of the following pollutants is not usually recycled?

• A. Aluminium cans
• B. Glass bottles
• C. Nuclear wastes
• D. Paper wastes

Nigerian crude oil is described as light crude because of its

• A. low sulphur content
• B. high natural gas content
• C. high octane number
• D. low aliphatic-hydrocarbon content

(a)(i) State three characteristics of a homologous series.

(ii) Give the name and structural formula of the second member of the alkyne series.

(iii) Write an equation to represent the combustion of ethane in excess oxygen.

(b) Name the type of reaction involved in the conversion of ethanol to

(i) ethene;

(ii) ethylethanoate;

(iii) chloroethane;

(iv) ethoxide

(v) ethanoic acid

(c) Consider the following compound.

(i) Write its IUPAC name.

(ii) Give its molecular formula and empirical formula

(iii) List the products of its H H 0 reaction with saturated Na\(_2\)CO\(_3\) solution.

(iv) State with reason whether its boiling point will be higher or lower than that of the corresponding alkane.

(d) A vegetable oil X was treated with activated charcoal and then with a gas Y in the presence of a catalyst in order to manufacture

(i) Identify Y.

(ii) State the function of the activated charcoal.

(iii) What is the catalyst used?

(iv) If a sample of X is heated with concentrated sodium hydroxide solution, list the products that will be obtained.

30cm³ pf hydrogen at s.t.p combine with 20cm³of oxygen to form steam according to the following equation 2H₂(g) + O₂(g) → 2H₂O(g). Calculate the total volume of the gaseous mixture at the end of the reaction

• A. 50cm³
• B. 35cm³
• C. 30cm³
• D. 25cm³

The following uses radioactive isotopes except for

• A) sterilization of medical equipment
• B) tracing reaction paths
• C) dating elements
• D) determining equilibrium positions

Oxygen is absent in?

• A. Kerosene
• B. Soil
• C. Glass
• D. Cement

Water has the ability to dissolve almost all substance because its molecules has a structure with

• A. one positive end and one neutral end
• B. one positive end and one negative end
• C. two negative ends
• D. two positive ends

From the following equations, what is the order of decreasing reactivity of X, Y and Z? Y (s) + X²⁺(aq) → Y²⁺(aq) + X(s) X(s) + Z²⁺(aq) → X²⁺(aq) + Z(s)

• A. X>Y>Z
• B. Y > X > Z
• C. Z > Y > X
• D. Y > Z > X

A metal M displaces zinc from ZnCl, solution, solution This shows that

• A) electrons flow from zinc to M
• B) M is more electropositive than zinc
• C) M is more electonegative than zinc
• D) zinc is more electropositive than M

A binary compound of oxygen with another element is referred to as?

• A. Oxide
• B. Element
• C. Carbon
• D. Nitrogen