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Chemistry Class 10 Chapter 9 - Chemical Equilibrium - 2
1.
A state of a chemical reaction in which the forward and reverse reactions takes place at the same rate is known as?
a) chemical equilibrium
b) exothermic reaction
c) endothermic reaction
d) non equilibrium
2.
Chemical equilibrium is a?
a) none of these
b) resting equilibrium
c) static equilibrium
d) dynamic equilibrium
3.
At chemical equilibrium, the concentrations of reactants and products?
a) reactants are higher than products
b) none of these
c) become constant
d) products are higher than reactants
4.
Dynamic chemical equilibrium means?
a) reactions are irreversible
b) reactions are equal
c) equilibrium is constant
d) reactions don't stop
5.
Who proposed the law of mass action?
a) Mendel and Guldberg
b) Mendel and Pastuer
c) Engelmann and P. Waage
d) C.M Guldberg and P. Waage
6.
Law of mass action was proposed to describe the?
a) endothermic reactions
b) enthalpy
c) exothermic reactions
d) chemical equilibrium
7.
The composition of equilibrium mixture is expressed in terms of?
a) variables
b) alphabets
c) all of these
d) numerical values
8.
The rate at which a substance reacts is directly proportional to its active mass and the rate at which the reaction proceeds is directly proportional to the product of active masses of the reactants. The statement is of?
a) newton's first law
b) law of conservation of energy
c) law of conservation of mass
d) law of mass action
9.
In the law of mass action, the term 'active mass' represents the concentration of?
a) both of these
b) none of these
c) products
d) reactants
10.
Law of mass action was proposed in?
a) 1864
b) 1874
c) 1954
d) 1964
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