Past Questions And Answers
From the words or group of words lettered A to D, choose the one that best completes each of the following sentences.
The two warring parties met for five days to iron........their differences.
- A. of
- B. in
- C. up
- D. out
(a) Consider the following atoms: \(^R_T\)X; \(^S_T\)X.
(i) State the phenomenon exhibited by the two atoms.
(ii) What is the difference between the atoms?
(iii) Give two examples of elements that exhibit the phenomenon stated in (ai)
(iv) lf T is 17, write the electron configuration of the element
(b)(i) State two differences between metals and-non-metals with respect to their:
I. physical properties;
2. chemical properties.
(ii) Give one example of each for the following compounds:
I. an amphoteric oxide;
II. a hydride which evolves hydrogen when reacted with water;
Ill. a trioxocarbonate (IV) salt which is readily decomposed on heating;
IV. a chloride salt which is readily hydrolyzed in water.
(c)(i) State three characteristic properties of transition metals.
(ii) Write the electron configuration of \(_{30}Zn\)
(iii.) Explain briefly why zinc is not considered as a typical transition element.
(d) Consider the reaction represented by the following equation:- Na\(_2\)CO\(_{3(aq)}\) + MgCl\(_{2(aq)}\) ----> 2NaCl\(_{(aq)}\) + MgCO\(_{3(aq)}\). Calculate the mass of sodium trioxocarbonate (IV) needed to produce 3.36 of magnesium trioxocarbonate (IV). [C = 12.0, O = 16.0, Na = 23.0, Mg = 24:0 ]
View Discussion (0)WAEC 2016 THEORYAtmospheric resources can used for all the following except
- A. power supply
- B. sifting of grains
- C. housing
- D. communication
A system of government which is based on the public ownership of means of production and distribution is called
- A. welfarism
- B. socialism
- C. feudalism
- D. authoritarianism
Poetry is defined by
- A. words written in sequence
- B. condensed use of language
- C. evocation of feelings
- D. legends and myths
Which of the following structures is used for respiration in insects?
- A. Lungs
- B. Thorax
- C. Cuticle
- D. Spiracles
The rule of the privileged nobility is referred to as
- A. plutocracy
- B. monarchy
- C. aristocracy
- D. autocracy
A transverse wave can be distinguished from a longitudinal wave by
- A. diffraction
- B. reflection
- C. refraction
- D. polarization
An example of organ level of organization is _______
- A. bird
- B. kidney
- C. spermatozoon
- D. xylem
(a) Explain five factors which determine the span of control
(b) Give five functions of the personnel department in a business establishment.
View Discussion (0)WAEC 1997 THEORY