Waec Chemistry 2001 Past Questions and Answers

Question 1:

• WAEC 2001

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 2:

• WAEC 2001

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 3:

• WAEC 2001

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:

• WAEC 2001

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 5:

• WAEC 2001

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