Waec Chemistry Past Questions For Year 2001
Question 1
What is responsible for metallic bonding?
- A. Sharing of electrons between the metal atoms
- B. Attraction between the atomic unclei and cloud of electrons
- C. transfer of electrons from one atom to another
- D. Attraction between positive and negative ions
Question 2
The presence of unpaired electrons in an atom of a transition metal gives rise to
- A. paramagnetism
- B. nalleability
- C. ductility
- D. shiny appearance
Question 3
The atom of an element X combines with aluminium (13AI)?
- A. AIX 2
- B. AI 2X
- C. AI2X 2
- D. AI 2X 3
Question 4
Elements which belong to the same group in the Periodic Table are characterized by
- A. difference of +1 in the oxidation numbers of successive members
- B. presence of the same number of outermost electrons in the respective atoms
- C. difference of 14 atomic mass units between successive members
- D. presence of the same number of electron shells in the respective atoms
Question 5
P Total = F1 + P2 + P 3 + .........Pn' where P Total is the pressure of a mixture of gasses. The equation above is an expression of
- A. Graham's law
- B. Gay-Lussac's Law
- C. Boyle's law
- D. Dalton's law
