WBJEE SERIES Chemistry
Equilibrium
12 previous year questions.
Volume: 12 Ques
Yield: Medium
High-Yield Trend
1
2023 1
2017 2
2012 2
2011 2
2010 3
2009 1
2008 Chapter Questions 12 MCQs
01
PYQ 2008
medium
chemistry ID: wbjee-20
Addition of sodium acetate to acetic acid will cause
1
increase in pH
2
decrease in pH
3
no change in pH
4
change in pH that cannot be predicted
02
PYQ 2009
medium
chemistry ID: wbjee-20
The equilibrium constant (K) of a reaction may be written as :
1
2
3
4
03
PYQ 2009
medium
chemistry ID: wbjee-20
Which of the following will decrease the of a solution of ?
1
addition of 5 ml of 1 M HCl
2
addition of 50 ml of 0.01 M HCl
3
addition of 50 ml of 0.002 M HCl
4
addition of Mg
04
PYQ 2009
medium
chemistry ID: wbjee-20
For the reaction if we write then x becomes
1
-1
2
3
4
1
05
PYQ 2010
medium
chemistry ID: wbjee-20
and each of volume are mixed and the volume is made up to by adding of solution. The of the resulting mixture is
1
1.17
2
10
3
0.3
4
06
PYQ 2010
medium
chemistry ID: wbjee-20
Calculate for the reversible process given below if and
1
1.95
2
1.85
3
1.89
4
1.6
07
PYQ 2011
medium
chemistry ID: wbjee-20
The pH of an aqueous solution of of concentrated is given by
1
2
3
4
08
PYQ 2011
medium
chemistry ID: wbjee-20
If the equilibrium constants of the following equilibria are given by and respectively, which of the following relations is correct
1
2
3
4
09
PYQ 2012
medium
chemistry ID: wbjee-20
In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will
1
also be doubled
2
be halved
3
remains the same
4
becomes one-fourth
10
PYQ 2012
medium
chemistry ID: wbjee-20
acetic acid is mixed with solution of . The of the resulting solution is of acetic acid is )
1
3.74
2
4.74
3
5.74
4
6.74
11
PYQ 2017
medium
chemistry ID: wbjee-20
Dissolving in de-ionized water will result in a solution having
1
pH < 7
2
pH = 7
3
pOH = 7
4
pH > 7
12
PYQ 2023
medium
chemistry ID: wbjee-20
Which of the following mixtures act(s) as a buffer solution?
1
NaOH+CH3COOH (1:1 mole ratio)
2
NH4OH+HCl (2:1 mole ratio)
3
CH3COOH+NaOH (2:1 mole ratio)
4
CH3COOH+NaOH (1:2 mole ratio)