JAMB Past Questions and Answers - Page 1180

5,896.

An item credited in the bank statement but yet to be recorded in the firm's cash book is

A.

Bank loan

B.

Contract payment

C.

Standing order

D.

Direct deposit

Correct answer is D

No explanation has been provided for this answer.

5,898.

GAS CO\(_2\) N\(_2\)

O\(_2\)

% BY VOLUME 4 72 24

The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?

A.

CO\(_2\) and O\(_2\)

B.

N\(_2\) and CO\(_2\)

C.

CO\(_2\), O\(_2\) and N\(_2\)

D.

O\(_2\) and N\(_2\)

Correct answer is D

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of other gases, too, such as carbon dioxide, neon, and hydrogen.

5,899.

What volume of (dm\(^3\)) of water will be added to 10dm\(^3\) of 2.0 mol/dm\(^3\) HCL acid solution to give a final solution of 0.5 mol/dm\(^3\)?

A.

30

B.

40

C.

20

D.

50

Correct answer is B

To make a fixed amount of a dilute solution from a stock solution,

use the formula: C1V1 = C2V2 

where: V1 = Volume of stock solution needed to make the new solution. 

C1 = Concentration of stock solution.

V2 = Final volume of new solution.

C2 = Final  concentration of stock solution

2 * 10 = 0.5 * V2

20 = 0.5V2

\(\frac{20}{0.5}\) = V2

= 40dm\(^3\)

5,900.

Alkanes are used mainly?

A.

in the textile industry

B.

in the hydrogenation of oils

C.

as domestic and industrial fuels

D.

as fine chemicals

Correct answer is C

Alkanes are very useful as fuels.