Chemistry Past Questions And Answers
According to the kinetic theory, an increase in temperature causes the kinetic energy of particles to
- A. Decrease
- B. Increase
- C. Remain constant
- D. Be zero
Metals can be stretched into wires because they are
- A. Ductile
- B. Good conductors
- C. Lustrous
- D. Malleable
Consider the reaction represented by the equation below, xNH3(g) + yCI2(g) → zHCI(g) + N2(g) The values of x,y and z are respectively
- A. 2, 4, 6
- B. 3, 2, 4
- C. 2, 3, 6
- D. 3, 2 6
Benzene can be converted to its derivative toluene by the addition of a methyl group. The reaction is an example of
- A. Nucleophilic substitution
- B. Elimination reaction
- C. Electrophilic substitution
- D. Addition reaction
Which of the following hydroxides will readily dissolved in water?
- A. Cu(OH)2
- B. NaOH
- C. Pb(OH)2
- D. Zn(OH)2
The properties of a good primary standard include the following except
- A. high molecular mass
- B. low molecular mass
- C. high degree of purity
- D. readily available
The number of electronic shells contained in an atom with electron configuration 1s22s22p63s23p64s2 is
- A) 3
- B) 2
- C) 4
- D) 5
Ethanol can easily be produced by
- A. fermentation of starch
- B. distillation of starch solution
- C. catalytic oxidation of methane
- D. destructive distillation of wood
(a) State one air pollution that causes:
(i) blood poisoning
(ii) acid poisoning
(iii) blackening of the walls of buildings
(b) Mention one major chemical industry in each case which requires the following as raw materials:
(i) petrochemicals;
(ii) cellulose.
View Discussion (0)WAEC 1993 THEORYWhich of the following equimolar solutions will have the highest pH?
- A. CH3COOHa
- B. NaOH
- C. HCl
- D. NH4OH