When a crystal was added to the clear solution of its salt, the crystal did not dissolve and the solution remained unchange. This showed that the solution was

• A. supersaturated
• B. concentrated
• C. unsaturated
• D. saturated

The following processes in crops are sensitive to daylength except

• A. fruiting
• B. growth
• C. flowering
• D. branching

The decrease in temperature at the rate of 6.5°C for every 1,000m of ascent is termed?

• A. dry adiabatic lapse rate
• B. normal lapse rate
• C. wet adiabatic lapse rate
• D. temperature inversion

Instruction: Choose the word opposite in meaning to the underlined word.

The challenger wascrude and inexperienced in constrast to the champion who was ...

• A. great
• B. exposed
• C. celebrated
• D. refined

PRODIGALITY: GENEROSITY

• A. humility: honour
• B. Compassion: contempt
• C. Courage: rashness
• D. Spirit: mettle

Given: Capital at the beginning: N20,000 Drawings: N3,000 Capital at end: N30,000 New capital introduced: N8,000 What is the profit for the period?

• A) N4,000
• B) N5,000
• C) N6,000
• D) N8,000

(a)(i) Name two gases that could be used to perform the fountain experiment.

(ii) State the physical property which makes the gases suitable for the experiment in (a)(i)

(b)(i) Define each of the following terms: I. solubility; II. saturated solution.

(ii) State two factors that affect the solubility of a solid in a liquid.

(iii) A salt Z of mass 10.2 g was dissolved in 15.4 cm\(^3\) of distilled water at 40°C. Calculate the solubility of Z in moldm\(^3\) at 40°C. [Mr (Z) = 331].

(c)(i) Town water supplies that have passed through iron pipes contain P and Q ions. In the presence of air, P ions are slowly converted to Q ions.

I. Identify P and Q ions. II. Write a balanced equation for the reaction between P ions, hydrogen ions and oxygen to give Q ions and water.

(ii) Explain briefly a test to confirm the purity of water.

(iii) State the effect of:

I. boiling a temporally hard water. II. adding sodium trioxocarbonate (IV) crystals to permanent hard water;

(iv) Write a balanced equation for the process in (c)(iii)I.

Cash discount is often recorded on?

• A. the debit side of the cash book
• B. the credit side of the cash book
• C. the folio column of the cash book
• D. both credit and debit side of the cash book

Danjuma Ltd. bought 10 bags of rice for N500 each. The company was given 5% and 12% trade and cash discounts respectively. What will be recorded as discount received in the company's book?

• A. ₦250
• B. ₦570
• C. ₦850
• D. ₦600

A finely divided from of a metal burns more readily in air than the rod from because the rod has

• A. higher molar mass
• B. smaller surface area
• C. protective oxide coating
• D. diferent chemical properties