Waec Chemistry Past Questions For Year 1999
Question 6
What is the electronic configuration of an element represented as 199X?
- A. 1s 22s2 2p 5
- B. 1s22s23s23p3
- C. 1s2 2s2 2p 33s2
- D. 1s 22s22p 63s23p64s 1
Question 7
The crystal layers in graphite are held together by
- A. electrostatic forces
- B. van der Waals' forces
- C. hydrogen bonds
- D. covalent bonds
Question 8
Which of the following halogens is the most reactive?
- A. F2
- B. Br2
- C. l2
- D. Cl
Question 9
Which of the following reactions is not feasible?
- A. Cl2 + 2Kl → 2KCI + I2
- B. Cl2 + 2NaF → 2NaCI + F2
- C. Zn + CuCI2 ZnCl2 + Cu
- D. Zn + 2AgNO3 → Zn(NO3)2 + 2Ag
Question 10
In the Periodic Table, the elements that loss electrons most readily belong to
- A. Group 1 A
- B. Group 11 A
- C. Group 111 A
- D. Group V11 A
