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The following can be obtained directly from the destructive distillation of coal except
Aammoniacal liquor
Bcoke
Cproducer gas
Dcoal gas
Ecoal tar
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Question 682
waec1995
Which of the following is hydrocarbons is unsaturated?
AEthane
BBenzene
CPropane
D2 - methylbutane
E2,2,4-trimethylpentane
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Question 683
waec1995
The following statements about graphite are correct except that it
Ais used as a lubricant
Bhas a network structure
Ccontains mobile free electrons
Dis good conductor
Eis an allotrope of carbon
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Question 684
waec1995
H3O+(aq) + OH-(aq) → 2H2O(l). The heat change accompanying the process represented by the equation above is the heat of
Aneutralization
Bformation
Csolution
Ddilution
Ehydration
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Question 685
waec1995
Which of the following is not correct of the reaction represented by the equation below? 2C(s) + O2(g) → 2CO(g); ∆H = - xKJ
Athere is an increase in entropy ;
BThere is anincrease in gaseous volume
CCarbon (lV) oxide is produced
DThe oxidation number of carbon increases from 0 to +2
EThe reaction is exothermic
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Question 686
waec1995
What mass of copper will be deposited by the liberation of Cu2+ when 0.1F of electricity flows through an aqueous solution of a copper (ll) salt? [Cu = 64]
A64g
B32g
C12.8g
D6.4g
E3.2g
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Question 687
waec1995
What mass of copper will be deposited by the liberation of Cu2+ when 0.1F of electricity flows through an aqueous solution of a copper (ll) salt? [Cu = 64]
A64g
B32g
C12.8g
D6.4g
E3.2g
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Question 688
waec1995
Sodium chloride cannot conduct electricity in the solid state because it
Ais a normal salt
Bis highly soluble in water
Cis an electrovalent compound
Ddoes not have any effect on litmus
Edoes not contain mobile ions
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Question 689
waec1995
Alums are classified as
Asimple salt
Bacid salts
Canhydrous salts
Ddouble salts
Ebasic salts
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Question 690
waec1995
Consider the reaction represented by the equation below: XO + YO → X + YO2 In the reaction, YO acts as
Aan acidic oxide
Ba basic oxide
Ca reducing agent
Da weak base
Ean oxidizing agent
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Question 691
waec1995
A positive brown ring test indicates the presence of
ANO 3
BFe 3+
CSO 2-3
DCU+
ENO-2
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Question 692
waec1995
The most suitable method for preparing lead (ll) chloride is by
Aaction of dilute HCI on PbSO 4
Bacts of dilute HCI on lead
Caction of dilute HCI on PbCO3
Dbubbling chlorine into a solution of Pb(NO3)2
Emixing aqueous solutions Pb(NO3)2 and NaCI.
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Question 693
waec1995
Which of the following species is always present in acidified water?
ANH+4
BO 2-
CHCI
DH3O+
EHNO3
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Question 694
waec1995
A weak acid is one which
Ais not corrosive
Bis slightly ionized in water
Cdoes not produce salts with alkalis
Ddoes not conduct an electric current in aqueous solution
Eforms acid salts with bases
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Question 695
waec1995
What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64]
A88.9%
B80.0%
C66.7%
D20.0%
E11.1%
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Question 696
waec1995
Which of the following cannot be deduced from the electronic configuration of a transition metal?
APossession of magnetic property
BAbility to form complex ions
CPosition in the Periodic Table
DVariable oxidation states
EPhysical properties of the metal
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Question 697
waec1995
Which of the following molecules is linear in shape?
ACH4
BH2O
CNH3
DH2S
ECI2
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Question 698
waec1995
If a solid has a low melting point and dissolves readily in benzene, it would probably
Acontain strong electrostatic forces of attraction
Bconduct electricity in the molten state
Cdissolve in water
Dhave covalent bonding
Eabsorb moisture on exposure to air
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Question 699
waec1994
What is the molar mass of an alkyne with the formula Cx H 14? (H = 1, C = 12)
A86g
B92g
C98g
D110g
E112g
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Question 700
waec1994
The following compounds contain the same type of bonds except
