NEET 2020 Chemistry: Chemical Equilibrium

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Question 1

The rapid change of pH near the stoichiometric point of an acid base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid (HIn) and base (In^-) forms of the indicator given by the expression.

• A
• B
• C
• D

Question 2

Which of the following is not an example of chemical equilibrium?

• AN _2(g) + H _2(g) = 2NH _3(g)
• BN₂O₄ (g) decomposes to give 2NO₂ (g)
• CH₂O (l) converts into H₂O (g)
• DCH₃COOH (l) + C₂H₅OH = CH₃COOC₂H₅ + H₂O (l)

Question 3

For which of the following active mass will not be equal to 1?

• APure Hg
• BKClO₃ (s)
• CVery diute HCl
• DNitrogen gas

Question 4

The following equilibrium constants are given :
N₂ + 3H₂2NH₃; K₁
N₂ + O₂2NO; K₂
H₂ + 1/2O₂H₂O; K₃
The equilibrium constant for the oxidation of NH₃ by oxygen to give NO is:

• AK₂/K₁
• BK₂/K₁
• CK₃/K₁
• DK₁K₂/K₃

Question 5

Which of the following is incorrect about chemical equilibrium?

• AThe rate of forward reaction is equal to the rate of the backward reaction.
• BThe equilibrium is possible from both the sides.
• CThe process is not dynamic in nature.
• DUnder similar condition of temperature, concentration and pressure, the same state of equilibrium is reached.

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