Waec Chemistry 2007 Past Questions and Answers

Question 1:

• WAEC 2007

When sodium atom form the ion Na⁺,

A. It gains one proton
B. It achieves a noble gas configuration
C. Its atomic number increases
D. It gains one electron

Question 2:

• WAEC 2007

When sodium atom form the ion Na⁺,

A. It gains one proton
B. It achieves a noble gas configuration
C. Its atomic number increases
D. It gains one electron

Question 3:

• WAEC 2007

Which of the following statements about rare gases are correct?

A. Their outermost shells are fully filled
B. They are generally unreactive
C. Their outermost shells are partially filled
D. They have lone pair of

Question 4:

• WAEC 2007

Which of the following properties is characteristic of the halogens?

A. Ability to accept electrons readily
B. Ability to donate electrons readily
C. Ability to from basic oxides
D. Formation of coloured compounds

Question 5:

• WAEC 2007

In which of the following atoms is the ionic radius larger than the atomic radius? [₁₁ Na, ₁₂Mg,₁₃AI,₁₇CI]

A. Aluminium
B. Chlorine
C. Magnesium
D. Sodium