Waec Chemistry 2009 Past Questions and Answers

Question 1:

• WAEC 2009

Which of the following scientists discovered the neutron?

A. Ernest Rutherford
B. J.J Thompson
C. James Chadwick
D. R. A. M illikan

Question 2:

• WAEC 2009

Which of the following scientists discovered the neutron?

A. Ernest Rutherford
B. J.J Thompson
C. James Chadwick
D. R. A. M illikan

Question 3:

• WAEC 2009

How many protons does ⁴⁰20[sub][/sub]Ca contain?

A. 20
B. 30
C. 40
D. 60

Question 4:

• WAEC 2009

If 100 atoms of element X contains 70 atoms of ⁹X and 30 atoms of ¹¹X, calculate the relative atomic mass of X

A. 9.6
B. 10.6
C. 11.6
D. 20.0

Question 5:

• WAEC 2009

Consider the reaction represented by the equation: ²³⁸₉₂U + ¹₀ → ¹³⁹₅₆Ba + ⁹⁴₃₆Kr + 3¹₀n. The reaction represents a

A. Nuclear fission
B. Nuclear fusion
C. Radioactive decay
D. Spontaneous disintegration