Waec Chemistry Past Questions For Year 1994
Question 1
A measure of the degree of disorder in a chemical system is known as the
- A. enthalpy
- B. free energy
- C. activation energy
- D. entrophy
- E. equilibrium
Question 2
Catalytic hydrogenation of alkenes produces compounds with the general formula
- A. CnH2n+1 OH
- B. CnH2n+1
- C. CnH2n+2
- D. CnH2n-2
- E. Cx(H2O)y
Question 3
The number of replaceable hydrogen atoms in one acid indicates its
- A. basicity
- B. acidity
- C. alkalinity
- D. reactivity
- E. pH value
Question 4
The components of universal indicator solution can best be separated by
- A. chromatography
- B. filtration
- C. evaporation
- D. crystallization
- E. fractional distillation
Question 5
The number of atoms in 1.2g of carbon - 12 isotope is
- A. 1.00 x 10 22
- B. 6.02 x 1022
- C. 1.20 x 10 23
- D. 1.00 x 1023
- E. 6.02 x 1024
