When following system is disturbed by addition of catalyst to the system container how does concentration of O2 change?2SO2(g) + O2(g) ↔ 2SO3(g) ΔH= +9kj/mol
Increase
Deacrease
No change
Q.2.
What is the energy needed for reactant particles to change into products?
Potential
Kinetic
Activation
Conversion
Q.3.
When following system is disturbed by addition of inert gas to the system container how does concentration of SO3 change?2SO2(g) + O2(g) ↔ 2SO3(g) ΔH= +9kj/mol
Increase
Deacrease
No change
Q.4.
When following system is disturbed by increasing volume of system container how does concentration of SO2 change?2SO2(g) + O2(g) ↔ 2SO3(g) ΔH= +9kj/mol
Increase
Deacrease
No change
Q.5.
A reaction is found to be second order with respect to carbon monoxide. If the concentration of carbon monoxide is doubled, the rate of reaction __________.
doubles
remains unchanged
increases by a factor of 4
is reduced by a factor of 2
Q.6.
What is explaining behaviors of a system at equilibrium?
Avagadro's Law
Boyles Law
Le Chatelier Principle
Collusion Theory
Q.7.
Limestone chunks are reaction with hydrochloric acid solution at constant temperature with average speed. If we crash the chunks of limestone into powder how would speed of reaction change?
Reaction speeds up
Reaction does not change
Reaction slows down
Reaction stops
Q.8.
To measure rate of reaction, either decreasing mass of solid reactant or increasing volume of gaseous products are used. Which of the following reactions uses increasing volume of gaseous product method to measure the its rate?
Reaction between iron metal and air
Reaction between sodium hydroxide and nitric acid
Reaction between table salt and water
Reaction between hydrochloric acid and aluminum metal
Q.9.
Which of the followings is not the dynamic chemical equilibrium?
H2(g) + l2(g) ↔ 2HI(g)
H2O(s) ↔ H2O(l)
N2O4(g) ↔ 2NO2(g)
N2(g) + 3H2(g) ↔ 2NH3(g)
Q.10.
What is the parameter to measure the rate or speed of a reaction beside time?
Change in volume
Change in consentration
Change in pressure
Change in temperature
Q.11.
What is the difference between integrated method and differential method
number of order
Raw data at y axis
Raw data at x axis
Non of the above
Q.12.
To measure rate of reaction, we can monitor change in which of the following?
Reactants only
Products only
Reactants or products
Q.13.
For second order reaction, the initial concentration of reactant A is 0.M. If the rate constant is 8.1 x 10-2 M-1 s-what is the concentration of A afterseconds?
0.02 M
0.15 M
0.30 M
0.45 M
Q.14.
The first order rate constant for the decomposition of 0.5 M compound A at 100oC is 0.min-Calculate the half-life of A.
1.5 min
8.3 min
23.1 min
66.7 min
Q.15.
What does [ ] denote?
concentration, M
concentration, m
concentration, mass %
squared
Q.16.
Reaction rate means...
amount of product formed
speed of reaction
concentration of reacting particles
combining reactants with products
Q.17.
Decreasing the particle size increases the reaction rate because
It makes particles move faster
It increases the likelihood of collisions with the correct geometry
It decreases the surface area available to react
It increases the number of collisions
Q.18.
Identify the order from the following rate constant : k =9.3×10-L mol-1s-1
second order
first order
zero order
third order
Q.19.
The time taken forcompletion of a first order reaction ismins .Then forcompletion ,the reaction will take
50 mins
30 mins
40 mins
60 mins
Q.20.
A first order reaction iscompleted in 1.26×s .How much time would it take forcompletion ?
1.26×1015 s
2.52×1014 s
2.52×1028 s
infinite
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