UNIZIK Chemistry 2013/2014 Day 1 Past Questions

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

When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes

A.negatively charged
B.positively charged
C.neutral
D.bipolar
E.none of the above.

The weakest attractive force that can be observed between two molecules is

A.ionic
B.covalent
C.coordinate covalent
D.Van der walls
E.all of the above.

A consequence of global warming is

A.air pollution
B.water pollution
C.increased humidity
D.flooding
E.none of the above.

A change in the temperature of a saturated solution disturbs the equilibrium between the

A.dissolved solute and the solvent
B.solvent and the undissolved solute
C.dissolved solute and the undissolved solute
D.dissolved solute and the solution
E.none of the above.

The commonest feature of reactions at the anode is that

A.electrons are consumed
B.oxidation is involved
C.ions are reduced
D.electrode dissolves
E.none of the above.

Phenolphthalein in acidic solution is

A.red
B.orange
C.colourless
D.yellow
E.pink

Natural water collected from rivers and ponds contains oxygen, cardon(IV) oxide and

A.nitrogen
B.hydrogen
C.chlorine
D.sulphur(IV) oxide
E.none of the above.

The component of an atom that contributes least to its mass is the

A.proton
B.nucleus
C.neutron
D.electron
E.none of the above.

The most abundant element on the earth's crust is

A.nitrogen
B.hydrogen
C.oxygen
D.chlorine
E.flourine

The ores that can be concentrated by flotation are

A.nitride ores
B.sulphide ores
C.oxide ores
D.chloride ores
E.none of the above.