Waec Chemistry Past Questions For Year 2002
Question 11
Which of the following compounds can be represented by the molecular formula C2H6O?
- A. Propanel
- B. Ethanol
- C. Methanoic acid
- D. Glucose
Question 12
The atom of an element X is represented as \(^y_z X\). The basic chemical properties of X depend on the value of
- A. Y
- B. Z
- C. Y - Z
- D. Z - Y
Question 13
An element Y has the electronic configuration 1s22s22p6623p4. To what period does it belong in the periodic table?
- A. 3
- B. 4
- C. 5
- D. 6
Question 14
The conclusion from Rutherford's alpha-scattering experiment is that
- A. atoms are mostly empty space with a small nucleus
- B. emissions from radioactive substances consist of three main components
- C. there is nuclear pull on orbital electrons
- D. electrons are deflected by both magnetic and electric fields
Question 15
Which of the following elements has a ground state electronic configuration with an incomplete penultimate shell?
- A. Iron
- B. Sodium
- C. Aluminium
- D. Calcium
