JEE Chemistry
Equilibrium
Question 1.
Calculate the pH of a solution obtained by mixing equal volumes of the solution with pH = 3 and pH = 5: [Level: Moderate]
(a)
(b)
(c)
(d)
Question 2.
Equal volume of solution with pH = 4 and pH = 10 are mixed. Calculate the pH of the solution [Level: Easy ]
Question 3.
The solubility of Mg(OH)2 is 8.1 x 10-2g/L at 2900C. Find out its Ksp at this temperature [Level: Easy]
Question 4.
The solubility product of AgCl in water is 1.5 x 10-10. Calculate its solubility in 0.01M NaCl aqueous solution. [Level: Hard]
(a) 2.43 x 10-4M
(b) 3.1 x 10-11 M
(c) 9.1 x 10-10 M
(d) 1.5 x 10-8 M
Question 5.
Degree of dissociation of 0.1N CH3COOH is (Kacid =1 x 10-5) [Level: Easy]
(a)
(b)
(c)
(d)
Question 6.
An acid having pH = 6 is diluted 1000times. What will be the pH of the final solution ? – [Level: Easy]
(a)
(b)
(c)
(d)
Question 6.
The concentration of hydrogen ion in a sample of soft drink is 3.8 x 10-3. What is the pH?
(a) 2.42
(b) 4
(c) 3.1
(d) 5.1
Question 7.
The pH of an aqueous solution of ammonia is 11.5. Find molarity of the solution. Kb (NH4OH) = 1.8 x 10-5 [Level: Moderate]
(a) 0.57M
(b) 3.19 M
(c) 1.030 M
(d) 103 M
Question 8.
How much should the H+ concentration of a solution be changed to raise the pH by unity?
[Level: Easy]
Question 9.
Calculate the solubility of A2X3 in pure water. Assuming that neither kind of ion reacts with water . The solubility product of A2X3, Ksp = 1.1 x 10-23
Question 10.
(a) 10-2
(b) 10-1
(c) 104
(d) 10-4
Question 11.
What is the minimum volume of water required to dissolved 1g of CaSO4at 298K. For calcium sulphate, Ksp = 9.1 × 10-6 – [Level: Moderate]
(a) K2
(b) K2
(c) K2
(d) K2
Question 12.
What type of salts are Na2HPO3 and NaHS? [Level: Easy]
Question 13.
Calculate the pH at equivalence point when a solution of 0.10M acetic acid is titrated with a solution of 0.10M NaOH solution. Ka for acetic acid = 1.9 × 10-5– [Level: Medium]
(a) 7.6
(b) 8.71
(c) 3.1
(d) 9
Question 14.
Consider the following solutions of equal concentrations [Level: Moderate]
A= NH4Cl
B = CH3COONa
C = NH4OH
D = CH3COOH
A buffer solution can be obtained by mixing equal volumes of
(a) C and D
(b) A and B
(c) A and C
(d) C and D
Question 15.
A weak acid HX has the dissociation constant 1 × 10-5M. It forms a salt NaX on reaction with alkali. The degree of hydrolysis of 0.1 M solution of NaX is [Level: Easy]
(a) 0.0001%
(b) 0.01%
(c) 0.1%
(d) 0.15%
Question 16.
In any chemical reaction, equilibrium is supposed to be establish when [Level: Easy]
(a) Mutual opposite reactions undergo
(b) Velocity of mutual reactions become equal
(c) Concentration of reactants and resulting products are equal
(d) The temperature of mutual opposite reactions become equal
Question 17.
For the reaction,
CuSO4.5H2O(s) ⇌ CuSO4.3H2O(s) + 2H2O(v) Which one is correct representation– [Level: Easy]
(a) Kp = PH2O2
(b) Kc = H2O2
(c) Kp = KcRT2
(d) All of the above
Question 18.
100 mL of 0.015 M solution is mixed with 100 mL of 0.005 M HCl. What is the pH of the resultant solution?
Question 19.
In a reaction at equilibrium ‘X’ mole of the reactant A decompose to give 1 mole each of C and D . If the fraction of A decomposed at equilibrium is independent of initial concentration of A, then the value of x is :Level: hard]
Question 20.
A decimolar solution of ammonium hydroxide is ionised to the extent of 1.3%. If log 1.3. If log1.3 = 0.11, what is the pH of the solution? [Level: Moderate]
(a) 11.11
(b) 7
(c) 8
(d) 1.21
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All About Daily Practice Problems on JEE Chemistry Equilibrium NCERT Chapter 7
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