Chemistry 2015 Waec Past Questions and Answers

Question 6 :

• WAEC 2015

The shape of a molecule of water is _______?

A. Non-linear
B. Octahedral
C. Pyramidal
D. Tetrahedral

Question 7 :

• WAEC 2015

A metallic ion Z²⁺ with an inert gas structure contains 18 electrons. How many protons are contained in this ion?

A. 20
B. 18
C. 16
D. 2

Question 8 :

• WAEC 2015

Which of the following pairs of elements forms amphoteric oxides?

A. Be and Mg
B. Na and K
C. B and Al
D. Si and Pb

Question 9 :

• WAEC 2015

Which of the following pairs of compounds belongs to the same homologous series?

A. C₃H₈ and C₃H₆
B. C₄H₁₀ and C₅H₁₀
C. C₂H₄ and C₄H₁₀
D. C₂H₆ and C₄H₁₀

Question 10 :

• WAEC 2015

The following transition metal ions would be coloured in aqueous solution except________?

A. Cr³⁺
B. Fe³⁺
C. Mn³⁺
D. Sc³⁺