Jamb Chemistry 1993 Past Questions and Answers

Question 6:

• JAMB 1993

An element, E, has the electronic configuration 1s²2s²2p⁶3s²p³. The reaction of E with a halogen X can give?

A. EX₃ and EX₅
B. EX₃ only
C. EX₅ only
D. EX₂ and EX₃

Question 7:

• JAMB 1993

Two atoms represented as U and U are?

A. Isomers
B. Allotropes
C. Isotopes
D. Anomers

Question 8:

• JAMB 1993

As the difference in electronegativity between bonded atoms increases, polarity of the bond?

A. Decreases
B. Increases
C. Remains unchanged
D. Reduces to zero

Question 9:

• JAMB 1993

Which group of elements forms hydrides that are pyramidal in structure?

A. III
B. IV
C. V
D. VI

Question 10:

• JAMB 1993

Water has a rather high boiling point despite its low molecular mass because of the presence of?

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