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Chemistry Class 10 Chapter 9 - Chemical Equilibrium - 4
1.
Equilibrium state of a chemical reaction can be determined by determining the concentration of?
a) both of these
b) products
c) none of these
d) reactants
2.
Which one of the following is a physical method of determining the chemical equilibrium?
a) none of these
b) titration
c) spectroscopy
d) both of these
3.
The units of equilibrium constant depend upon the?
a) form of equilibrium expression
b) Volume
c) Pressure
d) Temperature
4.
When the total number of moles of reactants is equal to the total number of moles of products in a balanced chemical equation, the unit
of Kc is?
a) no unit
b) mole dm 3
c) mole dm -2
d) mol dm-3
5.
Which one of the following is the importance of equilibrium constant?
a) to predict the extent of a chemical reaction
b) to know the initial concentration of reactants
c) all of these
d) to predict the direction of chemical reaction
6.
Ammonia is produced from the reaction of hydrogen with?
a) carbon
b) nitrogen
c) oxygen
d) iron
7.
Production of ammonia from hydrogen and nitrogen is?
a) both of these
b) reversible process
c) irreversible process
d) none of these
8.
Contact process is used in the formation of?
a) urea
b) ammonia
c) gold
d) sulphur dioxide
9.
If we impose a change in concentration, temperature or pressure on a chemical system at equilibrium, the system responds in a way that
opposes the change. It is known as?
a) law of mass action
b) equilibrium constant
c) Le Chatellier's principle
d) Newton's principle
10.
Habber process is used to form?
a) urea
b) sulphur dioxide
c) ammonia
d) gold
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