28.8cm³ of nitrogen at 15°C is cooled to 0°C at constant pressure, the new volume of nitrogen is

• A) 17.4cm³
• B) 14.7cm³
• C) 27.3cm³
• D) 31.7cm³

The best mode of ensuring that items posted got to the named address through?

• A. recorded delivery
• B. registered mail
• C. certificate of posting
• D. express mail

The Makkan forces were not successful at the battle of Khandaq because they

• A. ran out of supplies
• B. were not familiar with the strategy of the Muslims
• C. were not properly coordinated
• D. were afraid of another defeat

Which of the following products of biotechnology can be used as a fuel in place of petrol?

• A. Butane
• B. Ethanol
• C. Ethene
• D. Propanol

Solve the simultaneous equations y=3x and 4y-5x =14

• A. (-2,-6)
• B. (2,-6)
• C. (2,6)
• D. (-2,6)

God instructed Moses on Mount Sinai to

• A. speak to the rock
• B. stike the rock
• C. consecrate the people
• D. pray for the people

A major factor that enhanced the early development of accounting is the?

• A. Industrial Revolution
• B. growing of trade and commerce
• C. development of arithmetic
• D. invention of writing

In the figure above , TS//XY and XY = TY, ∠STZ = 34°, ∠TXY = 47°, find the angle marked n?

• A. 47°
• B. 52°
• C. 56°
• D. 99°

One of the ecological conditions which favour the spread of malaria is

• A. improper disposal of decaying organic matter
• B. clearing bushes around dwelling houses
• C. presence of water weeds
• D. presence of stagnant water in ponds

The table shows the distribution of marks scored by students in an examination. Calculate, correct to 2 decimal places, the

(a) mean ; (b) standard deviation of the distribution.