Waec Chemistry Past Questions For Year 2009
Question 11
Which of the following molecules is not linear in shape?
- A. CO2
- B. O 2
- C. NH3
- D. HCI
Question 12
In bonded atoms, increase in electronegativity difference,
- A. increases polarity
- B. decreases polarity
- C. has no effect on polarity
- D. brings the polarity to zero
Question 13
Which of the following arrangements is in order of increasing ionization energy?
- A. AI, Si, P, S
- B. Si, AI,S,P
- C. S,P,Si,AI
- D. P, Si,S,AI
Question 14
Which of the following properties of covalent compounds is not correct? They
- A. are non-electrolytes
- B. are mostly gaseous and volatile liquids
- C. have low melting point
- D. have high boiling points
Question 15
Which of the statements about the behaviour of the atom is correct?
- A. atomic size decreases down the group
- B. atomic size increases across the period
- C. anions are smaller than the parent atom
- D. cations are smaller than the parent atom
