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Which of the following raw materials is used in the plastic industry ?
ACalcium
BEthene
CHydrogen
DMethane
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Question 932
waec2009
The separation of petroleum fractions depends on the differences in their
Aboiling points
Bmolar masses
Cmelting point
Dsolubilities
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Question 933
waec2009
Which of the following oxides of nitrogen has oxidation number of + 1?
AKNO3
BN2O
CN2O3
DNO
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Question 934
waec2009
Consider the reaction represented by the equation: 2H2SO 4(aq0 + C(s) → 2H2O(l) + 2SO2(g) + CO 2(g) H2SO 4 is acting as
Aa catalyst
Ban oxidizing agent
Ca reducing agent
Da sulphonating agent
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Question 935
waec2009
Which of the following substances is the anode in the dry Leclanche cell ?
ACarbon rod
BMuslin bag
CThe seal
DZinc container
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Question 936
waec2009
Which of the following factors will affect the rate of the reaction represented by the equation? 2HCI(aq) + CaCO 3(s) → CaCI2(aq) + H2O (I) + CO2(g) l. Pressure ll. Concentration III. Nature of reactants IV. Temperature
Al and ll only
Bll, lll and IV only
Cl, ll and lll only
Dl, ll, lll and IV
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Question 937
waec2009
A catalyst increases the rate of chemical reaction by
Adecreasing the temperature of the reaction
Bdecreasing the activation energy of the reaction
Cincreasing the surface area of the reactants
Ddecreasing the surface area of the products
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Question 938
waec2009
Which of the following statement is correct? The solubility of
Agases increases with increase in temperature
Bgases decreases with increase in temperature
Cmost solid solutes decreases with indease in temperature
Dmost solid solutes is constant
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Question 939
waec2009
Which of the following salts is insoluble in water?
APb (NO3)2
BNa 2CO3
CAgNO3
DAgCI.
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Question 940
waec2009
A solution that contains as much solute as it can dissolve at a given temperature is said to be
Aconcentrated
Bsaturated
Csupersaturated
Dunsaturated
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Question 941
waec2009
Which of the following acids from normal salt only?
ATetraoxosulphate (IV) acid
BTetraoxophosphate (V) acid
CTrioxonitrate (V) acid
DTrioxosulphate (IV) acid
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Question 942
waec2009
Which of the following hydroxides will readily dissolved in water?
ACu(OH)2
BNaOH
CPb(OH)2
DZn(OH)2
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Question 943
waec2009
Which of the following compounds is not a double salt?
AZn(OH)NO3
BKAI(SO4)2
CKCr(SO4)2
D(NH4)2Fe(SO4)2
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Question 944
waec2009
Which of the following dilute acids does not react with metals to liberate hydrogen?
ACH3COOH(aq)
BHCI(aq)
CH2SO4(aq)
DHNO3(aq)
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Question 945
waec2009
Salts that contain water of crystallization are said to be
Aanhydrous
Bdeliquescent
Cefflorescent
Dhydrated
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Question 946
waec2009
Consider the reaction represented by the following equation: H 2(g) + \(\frac{1}{2}\) O(g) → H 2O(g) ∆H =-285.8 KJmo -1 ∆H represents the enthalpy of
Aformation
Bhydration
Cneutralization
Dsolution
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Question 947
waec2009
In a chemical reaction, ∆H is positive when
AH (product) >H (reactant)
BH(product) < H (reactant)
CH (product) = H (reactant)
DH (product) = Zero (reactant)
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Question 948
waec2009
In a mixture of gases which do not react chemically together, the pressure exerted by the individual gases is called
Aatmospheric pressure
Bpartial pressure
Ctotal pressure
Dvapour pressure
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Question 949
waec2009
Which of the following expressions correctly represents Charles' law?
APV = K
BR \(\alpha \frac{1}{\sqrt{p}\)
CPV = RT
DV = KT
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Question 950
waec2009
What is the value of -14oC on the Kelvin temperature scale?
