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Chlorine, bromine and iodine belong to the same group and
Aare gaseous at room temperature.
Bform white precipitate with AgNO3(aq)
Creact violently with hydrogen without heating
Dreact with alkali
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Question 362
waec2011
Which of the following arrangements is in order of increasing metallic property?
ALi < Na< k
BNa < Li < K
CK
DK < Li < Na
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Question 363
waec2011
Which of the following hydrohalic acids is the weakest?
AHBr
BHCI
CHF
DHI
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Question 364
waec2011
The energy change that accompanies the addition of an electron to an isolated gaseous atom is
Abond energy
Belectronegativity
Celectron affinity
Dionization energy
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Question 365
waec2011
Which of the following elements would produce coloured ions in aqueous solution?
ACalcium
Blron
CMagnesium
DSodium
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Question 366
waec2011
Rare gases are stable because they
Acontain equal number of protons and neutrons
Bcontain more electrons than protons
Care chemically active
Dhave octet structure
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Question 367
waec2011
An element with the electron configuration of 1s 22s 22p 6 would have a combining power of
Ao
B2
C6
D8
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Question 368
waec2011
Which of the following ions has the electron configuration 2,8,8?
ANa+
BMg2+
CF-
DCI-
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Question 369
waec2011
What type of reaction is represented by the following equation?\(\frac{2}{1}\)D\(\frac{3}{1}\)H → \(\frac{4}{4}\)He + \(\frac{1}{0}\)n + energy
ANuclear fission
BNuclar fusion
CRadioactive decay
DSpontaneous decay
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Question 370
waec2011
Which of the following electrons configurations correctly represents an inert element?
A1s22s22p4
B1s22s22p63s2
C1s22s22p63s23p4
D1s22s22p6
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Question 371
waec2011
How many isotopes has hydrogen?
A2
B3
C4
D5
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Question 372
waec2010
Which of the following metals exists as liquid at ordinary temperature?
ACopper
BGold
CMercury
DSilver
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Question 373
waec2010
Which of the following substances cannot be classified as a heavy chemical?
AAgNO3
BCaO
CCaOCI2
DH2SO4
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Question 374
waec2010
The main function of limestone in the blast furnance is to
Aact as a reducing agent
Bact as a catalyst
Cremove impurities
Dsupply carbon (IV) oxide
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Question 375
waec2010
Compound N reacts with sodium metal to produce a gas that gives a 'pop' sound with a burning splint N also react with ethanoic acid to give a sweet smelling liquid. Compound N is an
Aalkanol
Balkanoate
Calkane
Dalkanoic acid
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Question 376
waec2010
An organic compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. What is the empirical formula of the compound? [O = 16.0, C = 12.0, H = 1.0]
AC2HO
BCHO
CCH2O
DCHO2
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Question 377
waec2010
The IUPAC name of C2H6COOC2,/sub>H6 is
Aethyethanoate
Bethylproanoate
Cpropylethanoate
Dpropylpropanoate
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Question 378
waec2010
The products of fermentation of sugar are
Acarbon(IV) oxide and water
Bethanol and carbon (IV) oxide
Cethanol and water
Dethanol and enzymes
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Question 379
waec2010
An advantage of detergent over soap is that detergents
Aare readily available
Bare in powerdered from
Care non-biodegradable
Dlather readily with water
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Question 380
waec2010
Fact and oils are used as raw materials in the following industries except
