1994 - JAMB Chemistry Past Questions and Answers - page 5
41
8g CH4 occupies 11.2 dm3 at s.t.p. What volume would 22 g of CH3CH3 occupy under the same condition?
(C = 12, H = 1)
(C = 12, H = 1)
A
3.7 dm3
B
11.2 dm3
C
22.4 dm3
D
33.6 dm3
correct option: b
Users' Answers & Comments42
To what temperature must a gas 273 K be heated in order to double both its volume and pressure?
A
298 K
B
546 K
C
819 K
D
1092 K
correct option: d
Users' Answers & Comments43
For a gas, the relative molecular mass is equal to 2Y. What is Y?
A
The mas of the gas
B
The vapour density of the gas
C
The volume of the gas
D
The temperature of the gas
correct option: b
Users' Answers & Comments44
The densities of two gases, X and Y, are 0.5 g dm-3 and 2.0 dm-3 respectively.
What is the rate of diffusion of X relative to Y?
What is the rate of diffusion of X relative to Y?
A
0.1
B
0.5
C
2.0
D
4.0
correct option: c
Users' Answers & Comments45
The shape of ammonia molecule is?
A
trigonal planar
B
octahedral
C
square planar
D
tetrahedral
correct option: a
Users' Answers & Comments46
An increase in temperature causes an increase in the pressure of a gas because?
A
it decreases the number of collision between the molecules
B
the molecules of the gas bombard the walls of the container more frequently
C
it increases the number of collision between the molecules
D
it causes the molecules to combine
correct option: c
Users' Answers & Comments47
The number of electrons in the valence shell of an element of atomic number 14 is?
A
1
B
2
C
3
D
4
correct option: d
Users' Answers & Comments48
Which of the following physical properties decreases down a group in the periodic table?
A
Atomic radius
B
Ionic radius
C
Electropositivity
D
Electronegativity
correct option: b
Users' Answers & Comments49
Element X, Y and Z belong to a groups I, V and VII respectively. Which of the following is TRUE about the bond types of XZ and YZ3?
A
Both are electrovalent
B
Both are covalent
C
XZ is electrovalent and YZ3 is covalent
D
XZ is covalent and YZ3 is electrovalent
correct option: c
Users' Answers & Comments50
A solid that absorbs water from he atmosphere and forms an aqueous solution is?
A
hydrophilic
B
efforescent
C
deliquescent
D
hygroscopic
correct option: c
Users' Answers & Comments