In the eye, rays of light are focussed on the retina by being refracted at:

Vegetables like cauliflower, cabbage and broccoli have been bred from the original wild brassica plant by:

The units of specific latent heat are:

A spring is 100 mm long when unstretched. A 40 N load is hung from it, and its total length increases to 120 mm. A different load on the spring causes it to become 150 mm long. If the spring obeys Hooke′s Law, this second load is:

A girl whose weight is 250 N walks up a slope 40 m long onto a platform 3 m high. Her gain in gravitational potential energy is:

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 state symbol for a solution in water is:

0.0039 × 10^-2 in scientific notation is

One Faraday represents:

Biological catalysts in yeast are called:

The sharp-tasting compound in vinegar is:

The air temperature on a particular day is 27 ℃. An air bubble trapped in a tube by a thread of liquid is able to expand freely if it is heated.At what temperature would you expect the volume of the air bubble to double?

If x = 2³ × 5² =, then x⁴ =

Choose the ONE underlined part A, B or C that is inappropriate. If the sentence is acceptable as it stands, choose D.

The problem with the students is that they arrive late, gives no excuse, and are rude when spoken to.

When aluminium is extracted by electrolysis, cryolite is added to:

Which conclusion can be drawn from the table?

Which of the following are all deficiency diseases?

Choose the ONE underlined part A, B or C that is inappropriate. If the sentence is acceptable as it stands, choose D.

The biased reporter is concerned not so much with the truth of what he writes, as with its credibility.

A boy throws a cricket ball straight up in the air. At the very top of its flight:

The following are all minerals EXCEPT for: