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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 23
waec2011
Which of the following ions has the electron configuration 2,8,8?
ANa+
BMg2+
CF-
DCI-
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Question 24
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 25
waec2011
Which of the following electrons configurations correctly represents an inert element?
A1s22s22p4
B1s22s22p63s2
C1s22s22p63s23p4
D1s22s22p6
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Question 26
waec2011
How many isotopes has hydrogen?
A2
B3
C4
D5
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Question 27
jamb2011
The principle of column chromatography is based on the ability of the constituents to
Amove at different speeds in the column
Bdissolve in each other in the column
Creact with the solvent in the column
Dreact with each other in the column
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Question 28
jamb2011
choose the correct answer in the option above. Which of the following is a primary amine?
AA
BB
CC
DD
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Question 29
jamb2011
In the diagram above , X is the ``
Aenthalpy
Benthalpy change
Cactivation energy
Dactivated complex
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Question 30
jamb2011
with conc H2SO4 as catalyst
CH3COOH + C2H5OH → CH3COOC2H5 + H2O
Aesterification
BCondensation
Csaponification
Dneutralization
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Question 31
jamb2011
Which of the following statements is true about 2-methylpropane and butane
AThey are not members of the same homologous series
BThey have the same boiling point
CThey have different number of carbon atoms
DThey have the same chemical properties
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Question 32
jamb2011
Two organic compounds K and L were treated with a few drops of Fehling's solutions respectively . K formed a brick-red precipitate while L, remains unaffected. The compound K is an
Aalkanol
Balkane
Calkanal
Dalkanone
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Question 33
jamb2011
The functional groups present in the compound above are
Aalkene and halo-group
Bhydroxyl and chloro-group
Calkene and chloro-group
Dhydroxyl and halo-group
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Question 34
jamb2011
The number of isomers that can be obtained from C\(_4\)H\(_{10}\) is
A3
B4
C1
D2
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Question 35
jamb2011
At 25o and zymase as catalyst,
C6H126 → 2C2H5OH + 2CO2 + energy
The reaction above represented by the equation above is useful in the production of
Apropanol
Bbutanol
Cmethanol
Dethanol
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Question 36
jamb2011
An organic compound has an empirical formula CH2O and vapour density of 45.
What is the molecular formula?
[C = 12, H = 1, O = 16]
AC3H7OH
BC2H5OH
CC3H6O3
DC2H4O2
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Question 37
jamb2011
Which of the following compounds will undergo polymerization reaction?
AC2H4
BC2H5COOH
CC2H6
DC2H5OH
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Question 38
jamb2011
The ability of carbon to form long chains is referred to as
Aalkylation
Bacylation
Ccatenation
Dcarbonation
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Question 39
jamb2011
The constituents of baking powder that makes the dough to rise is
ANaHCO3
BNaOH
CNa2CO3
DNaCl
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Question 40
jamb2011
Bronze is preferred to copper in the making of medals because it
