UNIPORT Chemistry 2019/2020 Past Questions

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

Which of the following air pollutant causes acid rain?

A.sulphur dioxide
B.lead oxide
C.carbon dioxide
D.hydrogen sulphide

Which does not decolorize bromine water?

A.C₂H₂
B.C₂H₄
C.C₂H₆
D.C₃H₆

Aluminum materials should not be exposed to alkalis because aluminium is

A.basic
B.acidic
C.amphoteric
D.a reducing sugar

Under high pressure, real gases deviate from compliance with gas laws because their molecules

A.experience repulsive forces
B.have become more energetic
C.have become less energetic
D.collide inelastically

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

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

If a given quantity of electricity liberates 0.65g of Zn²⁺, what amount of Hg²⁺ would be liberated by the same quantity of current? (Zn 65, Hg = 201).

A.1.00g
B.2.01g
C.4.02g
D.8.04g

X = 1s²2s¹; Y = 1s²2s²2p⁶3s²3p⁵ Which of the following statements is true of X and Y above

A.X and Y are oxidizing agent
B.X and Y are reducing agents
C.X and Y will form coordinate bond
D.X and Y will form electrovalent bond

All the following will liberate a gas when reacted with dilute hydrochloric acid except

A.Sodium trioxosulphate (IV) salt
B.Sodium trioxocarbonate (IV) salt
C.Sodium sulphide
D.Sodium trioxonitrate (V)

The isomer of a compound C₅H₁₀ which does NOT decolorize bromine water is.

A.2 - methylbutane
B.2,2, - dimethylpropane
C.2 - methylbut - 1 - ene
D.Methylcyclobutane

The functional group represented in the compound CH³CH²CH²CH²CH=O is

A.Alkanone
B.Alkanal
C.Alkanol
D.Alkanoate