All of these are compounds EXCEPT for:

Which of the following may result if many people do what the young man in the picture is doing?

1. The rapid growth of cities
2. The growth of shanty towns and squatter settlements
3. The brain drain experienced by many developing countries
4. Inadequate housing, educational and health facilities in urban areas

If a reaction takes 50 seconds at 25 ℃, then at 50 ℃ the time for the reaction in seconds is likely to be about:

The standard atom used for mass calculations is:

Iron chloride can be prepared from the reaction of iron and:

When black copper oxide is heated with carbon, brown copper metal is produced, which means that compared to copper, carbon is the:

The range of values of v when 5 - v ≤ 2v - 1 is

Which of the following transactions should be debited in the Cash Account?

The density of seawater is:

An enzyme which has an optimum pH of 3 will function best in the:

To make cell walls, plants must have:

Genetic engineering involves:

The equation of the line which passes through the point (0, 2) and has a gradient of ¹/₃ is

Arrange the following secondary storage devices in order of increasing capacity from smallest to largest: a 1GB memory card, CD-ROM, DVD and a 128 MB flash drive.

The rate of reaction between marble and hydrochloric acid can be speeded up by using:

The water authority charges $10.00 per month for the meter rent, $2.50 for the first 1 000 litres and $0.10 for each additional 100 litres. What is the total bill for 2 500 litres used in one month?

The decimal equivalent of ⁷/₈ is

Which of the following is based on exploiting non-renewable natural resources?

The following are all natural materials EXCEPT for:

In the Venn diagram above, the shaded portion represents