2010 - JAMB Chemistry Past Questions and Answers - page 1
1
Which of the following is an example of a mixture?
A
Common salt
B
Blood
C
Sand
D
Washing soda
correct option: b
Users' Answers & Comments2
Calculate the percentage by mass of nitrogen in calcium trioxonitrate (V)
[Ca = 40, N = 14, O = 16]
[Ca = 40, N = 14, O = 16]
A
8.5%
B
13.1%
C
17.1%
D
27.6%
correct option: c
Users' Answers & Comments3
The droplets of water observed around a bottle of milk taken out of the refrigerator is due to the fact that the
A
water vapour in the air around the bottle gains some energy from the bottle
B
temperature of the milk drops as it loses heat into the surroundings
C
saturated vapour pressure of the milk is equal to the atmospheric pressure
D
water vapour in the air around the bottle loses some of its energy to the bottle
correct option: d
Users' Answers & Comments4
The volume of a given gas is V cm3 P mm Hg. what is the new volume of the gas if the pressure is reduced to half at constant temperature
A
4 V cm3
B
2 V cm3
C
V/2 cm3
D
V cm3
correct option: b
Users' Answers & Comments5
Moving from left to right across a period, the general rise in the first ionization energy can be attributed to the
A
decrease in nuclear charge
B
increase in nuclear charge
C
decrease in screening effect
D
increase in screening effect
correct option: b
Users' Answers & Comments6
How many unpaired electron(s) are there in the nitrogen sub-levels/
A
3
B
2
C
1
D
none
correct option: a
Users' Answers & Comments7
The stability of the noble gases is due to the fact that they
A
have no electron in their outermost shells
B
have duplet or octet electron configurations
C
belong to group zero of the periodic table
D
are volatile in nature
correct option: b
Users' Answers & Comments8
The maximum number of electrons in the L shell of an atom is
A
2
B
8
C
18
D
32
correct option: b
Users' Answers & Comments9
Elements in the same period in the periodic table have the same
A
number of shells
B
atomic number
C
chemical properties
D
physical properties
correct option: a
Users' Answers & Comments10
12D + 13T → 24He + 01n + energy
The reaction above illustrates
The reaction above illustrates
A
alpha decay
B
artificial transmutation
C
nuclear fussion
D
nuclear fission
correct option: c
Users' Answers & Comments