Waec Chemistry 2016 Past Questions and Answers

Question 16:

• WAEC 2016

The bond formed between H₂O and H₊ to form the hydroxonium H₃O₊ is

A. Dative
B. Covalent
C. Electrovalent
D. Ionic

Question 17:

• WAEC 2016

An element X froms the following oxides X₂O, XO and XO₂. This phenomenon illustrates the law of________?

A. Conservation of mass
B. Definite proportion
C. Mass action
D. Multiple proportion

Question 18:

• WAEC 2016

How many moles of oxygen would contain 1.204 x 10²⁴ molecules?
[Avogadro's constant (NA) = 6.02 x 10²³]

A. 1
B. 2
C. 3
D. 4

Question 19:

• WAEC 2016

Which of the following statements about solids is correct?

A. Solid particles are less orderly than those of a liquid
B. Solid have lower densities than liquids
C. Solid particles have greater kinetic energies than those of liquids
D. Solid particles cannot be easily compressed

Question 20:

• WAEC 2016

Which of the following apparatus can be used to measure a specific volume of a liquid accurately?

A. Beaker
B. Conical flask
C. Measuring cyclinder
D. Pipette