Waec Chemistry 2004 Past Questions and Answers

Question 6:

• WAEC 2004

A nuclide emits a beta-particle (e) in the process, that atomic number

A. Increases by 1 while the mass numer remains constant
B. Decreases by 2 while the mass number remains constant
C. Remains constant while the mass number decreases by 2
D. Remains constant while the mass number increases by 1

Question 7:

• WAEC 2004

One of the characteristics of transition metals is

A. Reducing ability
B. Ductility
C. Ability to conduct electricity
D. Formation of coloured ions

Question 8:

• WAEC 2004

A metal X forms two chlorides with the formulae XCI₂ and XCI₃. Where is X in the Periodic Table?

A. Group ll
B. Group llI
C. D-block
D. S-block

Question 9:

• WAEC 2004

A metal X forms two chlorides with the formulae XCI2 and XCI3. Where is X in the Periodic Table?
What type of bonding exists between X and chlorine in each of the chlorides?

A. Metallic bonding
B. Ionic bonding
C. Covalent bonding
D. Dative bonding

Question 10:

• WAEC 2004

Which of the following equipment is not used to detect radioactivity?

A. Wilson cloud chamber
B. Geiger- muller counter
C. Mass spectrometer
D. Photographic plate