Waec Chemistry 2007 Past Questions and Answers

Question 6:

• WAEC 2007

A transition metal would be expected to

A. From oxides with different formulae
B. Have strong oxidizing ability
C. Have low density
D. Have an atomic structure with an incomplete outermost shell

Question 7:

• WAEC 2007

Which of the following properties of atoms generally increases down a group in the periodic table?

A. Electron affinity
B. Electronegativity
C. Ionic radius
D. Lonization energy

Question 8:

• WAEC 2007

Which of the following statements about sodium is not true?

A. Na⁺ is smaller in size than Na
B. Na is smaller in size than Na⁺
C. Na⁺ has fewer electrons than Na
D. The effective nuclear charge in Na⁺ is greater than in Na

Question 9:

• WAEC 2007

If the difference between the electronegativities of two elements is large, the type of bond that can be formed between them is

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

Question 10:

• WAEC 2007

Which of the following compounds has hydrogen bonds between its molecules?

A. HF
B. HBr
C. HCI
D. HI.