OAU Chemistry 2020/2021 - Model Past Questions

Practice each question, then open it to see the full details.

The dispersion of a liquid in a medium will give

A.an aerosol
B.an emulsion
C.a fog
D.a gel

The number of lone pair of electrons in water molecule is

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

An example of a solid emulsion is

A.butter
B.hair cream
C.milk
D.cod-liver oil

The relative molecular mass of an alkyne with six carbon atoms is

A.78
B.84
C.82
D.72

Calculate the pH of a solution of 0.0001 moldm-³ hydrochloric acid

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

Calculate the mass of magnesium that would be deposited by 8 faradays of electricity? [Mg = 24]

A.96g
B.48g
C.72g
D.120g

The uncovered raw food that is sold along major roads is likely to contain some amounts of

A.Pb
B.Cu
C.Ag
D.Na

How many unpaired electron(s) are there in the nitrogen sub-levels?

A.1
B.0
C.3
D.2

How many unpaired electrons are in the p-orbitals of a fluorine atom?

A.1
B.2
C.3
D.0