UNIZIK Chemistry 2006/2007 Day 1 Past Questions

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

Equilibrium is said to be attained in a reversible reaction when

A.all the reactions have been used up
B.all the products have been formed
C.there is no further change in temperature
D.the rates of the forward and backward reactions are equal
E.the rate of formation of the products decreases with time

Bubbling of carbon (IV) oxide into calcium hydroxide solution results in the formation of

A.CaO
B.Ca(OH)₂
C.CaCO₃
D.Ca (HCO₃)₂
E.H₂CO₃

If 3 moles of electrons are required to deposit 1 mole of a metal M during the electrolysis of its molten chloride, the empirical formula of the metallic chloride is

A.M₃Cl
B.M₃Cl
C.MCl
D.M₂Cl₃
E.MCl₃

Which of the following compounds crystallizes without water of crystallization?

A.Na₂CO₃
B.CuSO₄
C.MgSO₄
D.NaCl
E.FeSO₄

When starch undergoes complete enzyme catalyzed hydrolysis, the resulting product is

A.glucose
B.maltose
C.sucrose
D.fructose
E.cellulose

When steam is passed over white-hot coke the products are

A.carbon (IV) oxide and nitrogen
B.carbon (II) oxide and hydrogen
C.carbon (II) oxide and nitrogen
D.carbon (IV) oxide and hydrogen
E.carbon (IV) oxide and steam

Which of the following compounds will not decompose when heated strongly?

A.NaHCO₃
B.K₂CO₃
C.MgCO₃
D.Ca(HCO₃)₂
E.ZnCO₃

The rate of a reaction is proportional to the number of effective collisions per second between the reactants, this statement is associated with the

A.kinetic theory
B.rate law
C.atomic theory
D.collision theory
E.gas laws

How many faradays of electricity are required to liberate 9g of aluminum? (Al = 27):

A.0.1
B.0.3
C.1.0
D.2.7
E.3.0

Which of the following metals will be the most suitable for use where lightness and resistance to corrosion are of importance?

A.lead
B.Copper
C.Iron
D.Calcium
E.Aluminum