WorksheetsChem Quizzy SDS (H1P01A-H6P04B)
Total questions: 20
Worksheet time: 20mins
Question 1
Which of the following statements is FALSE about gas?
A. The attractive forces between gas molecules for ideal gas is
negligible.
B. Real gases will behave ideally at high pressure and low
temperature
C. According to Charles’ law, at constant pressure, the
volume of a certain mass of gas is directly proportional to
temperature.
D. Molecules of ideal gas always collide with each other and
the container walls, but there is no loss of kinetic energy.
Question 2
Which of the following quantities is independent of the type of attractive forces between molecules in liquid state?
A. viscosity
B. evaporation rate at a specific temperature
C. enthalpy of fusion and vaporisation
D. distribution of kinetic energy of molecules
Question 3
The normal boiling point of a liquid is the temperature at which
A. The boiling point of the liquid equals to 100°C.
B. Its vapour pressure is equal to 760 mmHg.
C. The liquid and vapour coexist at equilibrium
D. Gas molecules have higher kinetic energy than that of liquid
molecules.
Question 4
By assuming the following gases are ideal, the number of collisions between argon atom, Ar and the container walls per unit time is
A. constant as CO2 is added to the vessel at constant
temperature.
B. increased as CO2 is added to the vessel at constant
temperature.
C. constant when the volume of the vessel is reduced at
constant temperature.
D. decreased when the average kinetic energy molecules
increases.
Question 5
What is increasing as time increases?
A. state of matter
B. boiling point
C. melting point
D. kinetic energy
Question 6
The combination of pressure and temperature where all three states of matter will exist at the same time
A. triple point
B. temperature point
C. pressure point
D. the point of three states
Question 7
In a closed container, the molecules evaporating will eventually equal
A. the molecules condensing
B. the molecules in the liquid
C. the molecules of air
D. the molecules in equilibrium
Question 8
Kinetic theory of gas states that....
I Gaseous particles are too small and negligible
compared to the container size.
II The pressure in a vessel is exerted by the elastic
collisions between the gaseous particles and the
container walls.
III When the gases in a container are heated, the
average kinetic energy of gas increases.
A. I only
B. I and II
C. II and III
D. I, II and III
Question 9
______________________ takes place when a liquid changes to a solid.
A. freezing
B. melting
C. boiling
D. sublimation
Question 10
Which state of matter has the lowest compressibility?
A. Solid
B. Liquid
C. Gas
D. Plasma
Question 11
At what time the reaction reached equilibrium?
A. t1
B. t2
C. t3
D. t4
Question 12
How do catalysts increase the rate of reaction?
A. the frequency of collisions is the increased
B. the activation energy is lowered
C. the energy of collisions is increased
D. both the frequency and energy of collisions is increased
Question 13
At elevated temperatures ammonium carbonate, NH2COONH4, is in equilibrium with NH3 and CO2 according to the equation;
NH2COONH4(s) ⇌ 2 NH3(g) + CO2(g)
What is the equilibrium expression for this reaction?
A. K = 2 [NH3][CO2]
[NH2COONH4]
B. K = [NH3]2[CO2]
[NH2COONH4]
C. K = 2 [NH3][CO2]
D. K = [NH3]2[CO2]
Question 14
2SO2(g)+O2(g)⇌2SO3(g)
Decreasing volume of container will
A. shift equilibrium right
B. shift equilibrium left
C. change K
D. have no change
Question 15
H2(g)+Cl2(g)⇌2HCl(g)
The forward reaction is exothermic. What will happen to the equilibrium if the temperature is increased?
A. equilibrium shifts right
B. equilibrium shifts left
C. you cannot predict the effect
D. no change
Question 16
Identify the labels (a) and (b) on the graph.
A. a is concentration of reactants and b is the concentration of
product
B. a is concentration of product and b is the concentration of
reactant
C. a is the volume of reactants and b is the volume of product
D. a the mass of reactants and b is the mass of product
Question 17
What are the two factors to look for when determining if the reaction is at equilibrium?
A. Forward reaction rate is faster than the reverse and
concentrations are equal
B. Forward and reverse reaction rates are equal and
concentration is constant
C. Forward and revers reaction rates are equal and
concentration is equal
D. Forward reaction rate is faster than the reverse and
concentration is equal
Question 18
The Kc value for a reaction is 0.08 at 700 K and 0.60 at 600 K. Which of the following statements is(are) TRUE about the reaction?
I The reaction is exothermic.
II The reaction yield decreases with increasing
temperature.
III Kc is inversely proportional to the absolute
temperature.
A. I only
B. I and II
C. III and III
D. I,II and III
Question 19
Which of the following is NOT true at equilibrium?
A. The forward and reverse reactions proceed at the same rate.
B. The concentrations of reactants and products do not change.
C. The concentration of the reactants is equal to the concentration of the products.
D. The forward and reverse reactions continue to occur.
Question 20
What is the Keq expression for this reaction?
2 NO(g) + O2(g) ⇌ 2 NO2(g)
A. Keq = [NO2]2 / [NO]2 [O2]
B. Keq = [NO]2 [O2] / [NO2]2
C. Keq = [NO]2 [O2] [NO2]2
D. Keq = [NO2]2 / [NO]2 + [O2]
