Waec Chemistry Past Questions For Year 2007
Question 1
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 2
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 3
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 4
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 5
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
