Jamb update 245
JAMB Chemistry TRIALS
QUESTIONS & ANSWERS
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1 :- the element with an
electron configuration
1s2 2s2 2p6 3s23p64s2
CORRECT ANSWER =
a noble gas
2 :- ethanoic acid is
monobasic because its
CORRECT ANSWER =
has one replaceable
hydrogen molecule
3 :- the type of bond in
nitrogen molecule is
CORRECT ANSWER =
covalent
4 :- in the
hydrogenation of
benzene, the catalyst
used is
CORRECT ANSWER =
Ni
5 :- the acid found in
sour milk is
CORRECT ANSWER =
lactic acid
6 :- transition metals
with higher oxidation
state will form oxides
that are
CORRECT ANSWER =
basic
7 :- the iupac
nomenclature of the
compound above is
CORRECT ANSWER =
pent-2-yne
8 :- in the diagram
above X is
CORRECT ANSWER =
H2
9 :- if 200cm3 of oxygen
passes through a
porous plug in
100sec.find the time
taken for the same
volume of hydrogen to
pass through the same
porous plug
CORRECT ANSWER =
25
10 :- the method used in
purifying sugar is
CORRECT ANSWER =
crystallization
11 :- the activation
energy of a chemical
reaction can be lowered
by
CORRECT ANSWER =
the addition of a catalyst
Engr naser daher cares
12 :- in the equation
above X is
CORRECT ANSWER =
CH3COOCH2CH3
13 :- a solubility curve is
a plot of the solubility of
solute against
CORRECT ANSWER =
TEMPERATURE
14 :- the method that is
not economical for the
removal of hardness in
water for town supply is
CORRECT ANSWER =
permutit
15 :- in the electrolytic
extraction of sodium
from fused sodium
chloride calcium
chloride is usually added
to
CORRECT ANSWER =
remove impurities
16 :- grades of petrol
having octane number
nearer zero will cause a
motor car engine to ‘
CORRECT ANSWER =
17 :- nickel is plated on
steel to
CORRECT ANSWER =
increase its strength
18 :- the solubility in
mol/dm3 of 20.2g of
potassium trioxonitrate
(V)dissolved in 100g of
water at room
temperature is
CORRECT ANSWER =
2
19 :- what is the atomic
number of an element
having 127 neutrons
and 82 electrons
CORRECT ANSWER =
82
20 :- 28.80CM3 OF
NITROGEN AT 15c is
cooled to 0C.its volue ar
constant pressure is
CORRECT ANSWER =
27.3
21 :- what physical
property of alkane
decreases as the
number of carbon
atoms increases
CORRECT ANSWER =
solubility
22 :- which of the
following substances
are made by
polymeriztion
CORRECT ANSWER =
nylon and artificial
rubber
23 :- which of the
following compounds is
unsaturated
CORRECT ANSWER =
methylbenzene
24 :- a compound
contains 31.9%
potassium 28.93
chlorine and the
remaining oxygen.what
is the chemical formula
of the compound?\
CORRECT ANSWER =
KClO2
25 :- the use of neon
light in aerodome
beacons is due to its
CORRECT ANSWER =
COLOUR
26 :- K4Fe(CN)6 is an
example of a
CORRECT ANSWER =
complex
27 :- if T change in s is
small relative to change
in H at room
temperature the value of
change in G will be
CORRECT ANSWER =
positive
28 :- the solibility of
alkanols in water is due
to the presence of
CORRECT ANSWER =
hydroxyl group
29 :- when lubricating
oil is redistilled,it yields
CORRECT ANSWER =
petroleum jelly
30 :- the iupac
nomenclature of
K2Cr2O7 SI
CORRECT ANSWER =
potassium
heptaoxochromate(VI)
31 :- ALKYNES BURN
WITH SMOKY LUMINOUS
FLAME DUE TO HIGH
CORRECT ANSWER =
carbon content
32 :- ozone is known for
its ability to
CORRECT ANSWER =
attack the respiratory
tract of organisms
33 :- which of the
following properties is
peculiar to graphite?
CORRECT ANSWER =
it is unreactive
34 :- calculate the
amount in moles of zinc
that will be deposited by
passing 10 faradays of
elctricity through a
solution of zinc salt
CORRECT ANSWER =
5
35 :- the air pollutant
that dissolves in water
due to produce acid rain
is
CORRECT ANSWER =
O3
36 :- the property
pecuiliar to pure oxygen
is that it
CORRECT ANSWER =
is lighter than air
37 :- the principal
property that
determines the method
of an extraction of a
metal from its oe is its
CORRECT ANSWER =
position in the activity
series
38 :- when water is
added to calcium
oxide,it forms
CORRECT ANSWER =
calcium hydroxide
39 :- in the reaction
above, the reverse
reaction can be favored
by
CORRECT ANSWER =
decreases the
temperature
40 :- an element with
electron configuration
1s2 2s2 2p6 3s2 3p4
belongs to the
CORRECT ANSWER =
p-block
WhatsApp 09067674757
Email tangimi100@gmail.com
I still remain chemically unchanged at the end of reaction ENGR BEBEJI 09067674757 💪💪💪💪
QUESTIONS & ANSWERS
*Powered by ENGR BEBEJI* 💪💪💪
Our subscription is still on
If you are interested inbox me
1 :- the element with an
electron configuration
1s2 2s2 2p6 3s23p64s2
CORRECT ANSWER =
a noble gas
2 :- ethanoic acid is
monobasic because its
CORRECT ANSWER =
has one replaceable
hydrogen molecule
3 :- the type of bond in
nitrogen molecule is
CORRECT ANSWER =
covalent
4 :- in the
hydrogenation of
benzene, the catalyst
used is
CORRECT ANSWER =
Ni
5 :- the acid found in
sour milk is
CORRECT ANSWER =
lactic acid
6 :- transition metals
with higher oxidation
state will form oxides
that are
CORRECT ANSWER =
basic
7 :- the iupac
nomenclature of the
compound above is
CORRECT ANSWER =
pent-2-yne
8 :- in the diagram
above X is
CORRECT ANSWER =
H2
9 :- if 200cm3 of oxygen
passes through a
porous plug in
100sec.find the time
taken for the same
volume of hydrogen to
pass through the same
porous plug
CORRECT ANSWER =
25
10 :- the method used in
purifying sugar is
CORRECT ANSWER =
crystallization
11 :- the activation
energy of a chemical
reaction can be lowered
by
CORRECT ANSWER =
the addition of a catalyst
Engr naser daher cares
12 :- in the equation
above X is
CORRECT ANSWER =
CH3COOCH2CH3
13 :- a solubility curve is
a plot of the solubility of
solute against
CORRECT ANSWER =
TEMPERATURE
14 :- the method that is
not economical for the
removal of hardness in
water for town supply is
CORRECT ANSWER =
permutit
15 :- in the electrolytic
extraction of sodium
from fused sodium
chloride calcium
chloride is usually added
to
CORRECT ANSWER =
remove impurities
16 :- grades of petrol
having octane number
nearer zero will cause a
motor car engine to ‘
CORRECT ANSWER =
17 :- nickel is plated on
steel to
CORRECT ANSWER =
increase its strength
18 :- the solubility in
mol/dm3 of 20.2g of
potassium trioxonitrate
(V)dissolved in 100g of
water at room
temperature is
CORRECT ANSWER =
2
19 :- what is the atomic
number of an element
having 127 neutrons
and 82 electrons
CORRECT ANSWER =
82
20 :- 28.80CM3 OF
NITROGEN AT 15c is
cooled to 0C.its volue ar
constant pressure is
CORRECT ANSWER =
27.3
21 :- what physical
property of alkane
decreases as the
number of carbon
atoms increases
CORRECT ANSWER =
solubility
22 :- which of the
following substances
are made by
polymeriztion
CORRECT ANSWER =
nylon and artificial
rubber
23 :- which of the
following compounds is
unsaturated
CORRECT ANSWER =
methylbenzene
24 :- a compound
contains 31.9%
potassium 28.93
chlorine and the
remaining oxygen.what
is the chemical formula
of the compound?\
CORRECT ANSWER =
KClO2
25 :- the use of neon
light in aerodome
beacons is due to its
CORRECT ANSWER =
COLOUR
26 :- K4Fe(CN)6 is an
example of a
CORRECT ANSWER =
complex
27 :- if T change in s is
small relative to change
in H at room
temperature the value of
change in G will be
CORRECT ANSWER =
positive
28 :- the solibility of
alkanols in water is due
to the presence of
CORRECT ANSWER =
hydroxyl group
29 :- when lubricating
oil is redistilled,it yields
CORRECT ANSWER =
petroleum jelly
30 :- the iupac
nomenclature of
K2Cr2O7 SI
CORRECT ANSWER =
potassium
heptaoxochromate(VI)
31 :- ALKYNES BURN
WITH SMOKY LUMINOUS
FLAME DUE TO HIGH
CORRECT ANSWER =
carbon content
32 :- ozone is known for
its ability to
CORRECT ANSWER =
attack the respiratory
tract of organisms
33 :- which of the
following properties is
peculiar to graphite?
CORRECT ANSWER =
it is unreactive
34 :- calculate the
amount in moles of zinc
that will be deposited by
passing 10 faradays of
elctricity through a
solution of zinc salt
CORRECT ANSWER =
5
35 :- the air pollutant
that dissolves in water
due to produce acid rain
is
CORRECT ANSWER =
O3
36 :- the property
pecuiliar to pure oxygen
is that it
CORRECT ANSWER =
is lighter than air
37 :- the principal
property that
determines the method
of an extraction of a
metal from its oe is its
CORRECT ANSWER =
position in the activity
series
38 :- when water is
added to calcium
oxide,it forms
CORRECT ANSWER =
calcium hydroxide
39 :- in the reaction
above, the reverse
reaction can be favored
by
CORRECT ANSWER =
decreases the
temperature
40 :- an element with
electron configuration
1s2 2s2 2p6 3s2 3p4
belongs to the
CORRECT ANSWER =
p-block
WhatsApp 09067674757
Email tangimi100@gmail.com
I still remain chemically unchanged at the end of reaction ENGR BEBEJI 09067674757 💪💪💪💪
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