Past Questions And Answers
Which of the following instruments can be used to compare the relative magnitude of similar charges on two given bodies?
- A. Electrophorus
- B. Ebonite rod
- C. Proof plane
- D. Gold-leaf electroscope
Given:
Opening stock: N40,000.00
Purchases: N115,000.00
Closing stock: N60,000.00
Sales: N250,000.00
Which is the cost of goods sold?
- A) N155,000.00
- B) N95.000.00
- C) N50,000.00
- D) N30,000.00
The corresponding entry of personal accounts found in the debit side of the cash is to
- A. credit real accounts
- B. debit real accounts
- C. credit the ledger
- D. debit the ledger
Ocean liners are subdivided into
- A. passenger liner and cargo liners
- B. coastel liners and cargo liners
- C. cargo liners and tramp liners
- D. passenger liners and tramp liners
A. creation of mid-west Region in 1963
- A. local chiefs
- B. local governments
- C. state governments
- D. federal governments
(a) Explain in terms of the kinetic theory why a tyre should not be overinflated.
(b)The following results were obtained at room temperature in an experiment to verify one of the gas laws using a glass syringe:
Pressure (P) of air in syringe (atm) | Volume (V) of air in syringe (cm\(^3\) | \(\frac{I}{V}\) |
| 0.100 | 10.00 | 0.100 |
0.125 | 8.00 | 0.125 |
0.150 | 6.60 | 0.150 |
0.175 | 5.60 | 0.179 |
0.200 | 4.80 | 0.208 |
| 0.225 | 4.40 | 0.227 |
(i) Plot a graph of P against \(\frac{1}{v}\), using 1 cm to represent 0.01 atm on the vertical axis and 1cm to represent 0.02 unit on the horizontal axis.
(ii) Which of the gas laws is in agreement with the results?
(c) The flow chart below represents the stages involved in the manufacture of H\(_2\)SO\(_4\).
+x +Conc. H\(_2\)SO\(_4\) +H\(_2\)O
S + O\(_2\) \(\to\) SO\(_2\) \(\to\) SO\(_3\) \(\to\) Y \(\to\) Conc H\(_2\)SO\(_4\)
stage I stage II stage III stage IV
(i) Name the process represented by the chart.
(ii) Identify reactant X and product Y.
(iii) What are the operating temperature and pressure at stage II?
(iv) Mention the stage which requires a catalyst and state the catalyst used.
(v) Give the reason why the SO\(_3\) produced in stage II is not dissolved directly in water to form the acid
(d) When K\(_4\)Cr\(_2\)C\(_7\) dissolves in water, the following equilibrium is established:
Cr\(_2\)O\(^{2-}_{7(aq)}\) + H\(_2\)O\(_{(l)}\) \(\to\) 2CrO\(^{2-}_{4(aq)}\) + 2H\(_{aq}\)
(i) State the colour observed on adding a few drops of dilute H\(_2\)SO\(_4\) to the system.
(ii) Explain your answer in (d)(1).
(iii) What principle is applicable to this explanation?
View Discussion (0)WAEC 2002 THEORYChoose the option nearest in meaning to the underlined word(s). The Lagos bus conductor wore his professionallivery.
- A. badge
- B. shoe
- C. uniform
- D. cap
What is the percentage by weight of calcium in Ca(OCI)2? [Ca = 40, Cl = 35.5, O = 16]
- A. 28.0%
- B. 31.6%
- C. 43.8%
- D. 44.5%
The time rate of loss of heat by a body is proportional to the
- A. temperature of its surroundings
- B. temperature of the body
- C. difference in temperature between the body and its surroundings
- D. ratio of the temperature of the body to that of its surroundings
Oligarchy implies rulership by
- A. an absolute monarch
- B. a few powerful individuals
- C. a military government
- D. a charismatic leader