UNICAL Chemistry 2009/2010 Past Questions

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

Which of the following can be explained by the kinetic theory? I. the physical state of matter. II. Diffusion of gases III. Melting of solid IV. Evaporation of liquids

A.IV
B.I & II
C.III & IV
D.I, II & III
E.I, II, III, & IV

The properties of electrovalent compounds include the following except

A.high melting point and boiling point
B.conduction of electricity in the molten state
C.high vitality at room temperature
D.ionization in aqueous solution

Which of the following statements is not correct about electrolysis?

A.reduction occurs at the anode
B.anions migrate to the anode
C.positive ions migrate to the cathode
D.concentration effects the discharge of ions

Separation of mixtures of solids by physical methods can be based on differences in the following except

A.melting point
B.solubility
C.particle size
D.molar mass

The following are major gaseous pollutants except

A.CO
B.CO₂
C.SO₂
D.CFC

Brass is an alloy containing copper and

A.zinc
B.tin
C.silver
D.lead

Which of the following reduces the activation energy of a chemical reaction?

A.freezing mixture
B.reducing agent
C.water
D.catalyst

In the electrolysis of brime, the anode is

A.carbon
B.platinum
C.zinc
D.copper

What current in ampere will deposit 0.27g of aluminum in 2 hours? (Al = 27, IF = 96500c)

A.2
B.8
C.0.4
D.16

What is the likely formula of a compound formed between element M in group 2 and between element X in group 7?

A.M₇X₂
B.MX₂
C.M₂V₇
D.M₂X