Waec Chemistry Past Questions For Year 1993
Question 31
Which of the following is correct about the electrons in the 1s orbital? They
- A. have the same spin
- B. are easier to remove than those in the 2p orbital
- C. are closest to the nucleus
- D. have the same energy as those in the 2s orbital
- E. have different magnetic quantum numbers
Question 32
Which of the following gases are diatomic except
- A. nitrogen
- B. helium
- C. hydrogen
- D. fluorine
- E. oxygen
Question 33
The alloy used for metal work and plumbing contains
- A. lead and tin
- B. iron and carbon
- C. copper and tin
- D. aluminium and copper
- E. lead and antimony
