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WorksheetsShort Quiz Chapter 4
Total questions: 20
Worksheet time: 2hrs 40mins
Name
Class
Date
1.
The density of ice is 0.9 g cm-3.
What is the volume of steam produced when 1 cm3 of ice is heated to 323°C at a pressure of 101 kPa?
What is the volume of steam produced when 1 cm3 of ice is heated to 323°C at a pressure of 101 kPa?
a)
0.041 dm3
b)
2.45 dm3
c)
2.71 dm3
d)
15.76 dm3
2.
The diagram above shows shows two bulbs containing gas A and gas B respectively at room temperature. When the valve connecting the two bulbs is opened and the system is allowed to attain equilibrium, the final pressure is 5 atm. What is the initial pressure of gas A?
a)
3 atm
b)
6 atm
c)
9 atm
d)
12 atm
3.
Under which set of conditions will a real gas show ideal behaviour>
a)
Temperature is low and pressure is high
b)
Temperature is high and pressure is high
c)
Temperature is low and pressure is low
d)
Temperature is high and pressure is low
4.
Which of the following gases is expected to show a marked deviation from ideal behaviour?
a)
CO2
b)
NH3
c)
CH4
d)
N2
5.
Which of the following is not correct for an ideal gas?
a)
The average kinetic energy of the gas increases with temperature
b)
The force of repulsion between molecules is proportional to the distance between them
c)
Gas molecules have mass but negligible volume
d)
There are no intermolecular forces between molecules
6.
The unit for the gas constant, R, is
a)
J mol-1 K-1
b)
J mol-1
c)
J-1 mol K
d)
J-1 mol-1 K
7.
Gas X of mass 0.118 g was filled into a 250 cm3 flask at 298 kK and 73.5 kPa. What is the mass of 1 mol of the gas?
a)
7.42 g
b)
11.3 g
c)
14.6 g
d)
15.9 g
8.
A gaseous mixture of A and B contains NA mol of A and NB mol of B, and has a total pressure of PT. What is the partial pressure of gas B in the mixture?
a)
NBPT
b)
(1-NB) x PT
c)
(NB x PT) ÷ (NA + NB)
d)
(NA x PT) ÷ (NA + NBPT)
9.
Calculate the volume in cm3 occupied by 0.30 g of a gas (Mr = 30) at 308 kPa and 300 K.
a)
48
b)
69
c)
81
d)
120
10.
The ideal gas equation is PV = nRT.
It can be concluded that, for an ideal gas,
I the volume of a fixed mass of gas will be doubled when its temperature is increased from 25°C to 50°C.
II the density of a gas, at constant pressure, is inversely proportional to the temperature
III one mol of any gas will occupy the same volume under the same conditions
It can be concluded that, for an ideal gas,
I the volume of a fixed mass of gas will be doubled when its temperature is increased from 25°C to 50°C.
II the density of a gas, at constant pressure, is inversely proportional to the temperature
III one mol of any gas will occupy the same volume under the same conditions
a)
I and II
b)
I and III
c)
II and III
d)
I, II and III
11.
Sulphur dioxide is an example of a non-ideal gas because .....
a)
its molecular size is small
b)
it has unpleasant odour
c)
it dissolves in water to form an acidic solution
d)
the intermolecular forces of attraction are strong
12.
In a syringe experiment, 0.20 g of a gas is found to occupy 60.0 cm3, measured at standard pressure (1.0 x 105 Pa) and 27°C. What is the relative molecular mass of the gas?
a)
(0.20 x 8.31 x 27) ÷ (1.0 x 105 x 60.0)
b)
(0.20 x 8.31 x 300) ÷ (1.0 x 105 x 60.0)
c)
(0.20 x 8.31 x 27) ÷ (1.0 x 105 x 60.0 x 10 -6)
d)
(0.20 x 8.31 x 300) ÷ (1.0 x 105 x 60 x 10-6)
13.
If heat is added to a pure liquid substance as its boiling point,
a)
the temperature will increase
b)
the temperature will decrease
c)
the temperature will remain constant
d)
the temperature of the vapour will be higher than the temperature of the liquid
14.
A solid melts sharply just above 100°C. It does not conduct electricity even when molten. It dissolves in hydrocarbon solvents. What is the structure of the solid most likely to be?
a)
A molecular crystal
b)
An ionic crystal
c)
A giant covalent crsytal
d)
An atomic crystal
15.
Which of the following does not contain a pair of allotropes?
a)
Hydrogen and tritium
b)
Oxygen and ozone
c)
Fullerene and diamond
d)
Monoclinic sulphur and rhombic sulphur
16.
A phase diagram of water is shown below :
What can be deduced from the phase diagram?
What can be deduced from the phase diagram?
a)
An increase in pressure will decrease the freezing point of water
b)
An increase in pressure will decrease the boiling point of water
c)
Ice sublimes at a pressure higher than 611 Pa
d)
Water exists as liquid at a pressure of 611 Pa and a temperature of 298 K
17.
The graph shows the Boltzmann distribution curve of molecular speeds. Which one of the following statements is correct?
a)
Raising the temperature always decreases the number of molecules with a given speed
b)
The area under the curve indicates the speed of molecules
c)
Raising the temperature moves the maximum of the curve to the right
d)
The peak of the curve represents the highest speed of the particles
18.
How many other cubes share a particle at the corner of a cubic unit cell?
a)
2
b)
3
c)
5
d)
8
19.
What is the structure of the unit cell of sodium chloride?
a)
Simple cubic
b)
Face-centred cubic
c)
Body-centred cubic
d)
Tetragonal
20.
Which of the following statement is true for both graphite and diamond?
a)
The presence of van der Waals forces
b)
The presence of covalent bonds between carbon atoms
c)
The carbon-carbon bonds are all of the same length
d)
The presence of delocalised electrons
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