Past Questions And Answers
The document which is used when a country imposes ad valorem duties is
- A. bill of lading
- B. consular invoice
- C. certificate of origin
- D. open indent
(i) Write the structure of 2—chloro-2—methylpropane.
(ii) Consider the compound X represented by the structure below:
I. State the functional group in X; II. Give the IUPAC name of X; Ill. State the homologous series to which X belongs. IV. Give the names of two compounds from which X is formed. V. State one physical characteristt of X.(b)(i) List two products obtained from fractional distillation of petroleum;
(ii) State one use of each product in (b)(i) above,
(iii) Mention one disadvantage of crude oil production
(c)(i) Mention the monomer of protein (ii) A compound has an empirical formula of CHO\(_2\) and its molar mass is 90. Deduce the molecular formula of the compound. [H = 1, C = 12, O = 16].
(d) Use the reaction scheme below to answer questions (i).— (iv).
(i) State the reagents needed for stages II and V;
(ii) Nanie the product Q of reaction in stage IV;
(iii) State the conditions required for stage III;
(iv) Give the names of the processes in stages I, II, Ill and V respectively.
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In a law of contract, what is given in exchange for a promise to perform is_____
- A. offer
- B. acceptance
- C. warranty
- D. consideration
(a) What is meant by the term acid salt? Give one example.
(b) State the reason why an all-glass apparatus must be used for the laboratory preparation of concentrated trioxonitrate (V) acid.
View Discussion (0)WAEC 1992 THEORYSubsistence farming is practiced when people
- A. grow crops for consumption
- B. grow only one crop
- C. export only one crop
- D. grow many crops for export
The factors that influence the performance of marketing activities of a firm is marketing
- A. orientation
- B. environment
- C. audit
- D. intelligence
One of the functions of the ports authority is
- A. checking the activities of smugglers.
- B. collecting import duties
- C. enforcing law and order in harbours
- D. providing warehousing services.
Calculate the value of y in the diagram
- A. 17
- B. 34
- C. 44
- D. 45
(i) Name two amorphous forms of carbon
(ii) State the reason why graphite is a lubricant but diamond is not.
(iii) Draw and label a diagram for the laboratory preparation of a dry sample of carbon (IV) oxide.
(b)(i) Give one example of the following: I. Soil pollutant; II. Water pollutant; III. Air pollutant.
(ii) State the major use of sulphur (IV) oxide in a chemical industry.
(c)(i) Explain in terms of the kinetic theory why petrol is volatile
(ii) State two criteria for determining the purity of a substance.
(iii) Mention one use of each of the following gases: I. Krypton; II. Argon
(d)(i) When zinc metal was added to aqueous copper (I) tetraoxosulphate (VI), the solution turned colourless. I. Name the compound in the colourless solution. II. Write the ionic equation for the reaction. Ill. State what would be observed when a few drops of sodium hydroxide solution is added to a portion of the colourless solution.
(ii) Calculate the volume of CO\(_2\) produced when 5.3g of Na\(_2\)CO\(_3\) reacted with excess HNO\(_{3(aq)}\) + Na\(_2\)CO\(_3\) + 2HNO\(_{3(aq)}\) \(\to\) 2NaNO\(_{3(aq)}\) + CO\(_{2(g)}\) + H\(_2\)O\(_{(l)}\) [H = 1, C = 12, N = 14, O = 16, Na = 23, 1 mole of a gas occupies 22.4 dm\(^3\) at s.t.p.]
View Discussion (0)WAEC 2005 THEORY(a) Who is an actuary?
(b) Differentiate between contribution and group insurance
(c) Describe three types of risks that may be insured against under marine insurance.
View Discussion (0)WAEC 1998 THEORY