Daily Practice Problems
Class 11 Chemistry
Equilibrium
Class 11 Chemistry
Equilibrium
Question1.
The value of Kc for the reaction, N2 (g) + 3H2 (g) ⇌ 2NH3 (g) is 0.50 at 400 °C. Find the value of Kp at 400 °C when concentrations are expressed in mol L-1 and pressure in atmosphere.
Question2.
The first and second dissociation constants of an acid, H2A, are 1 x 10-5 and 5 x 10-10
respectively. The overall dissociation constant of the acid will be:
1) 0.2 x 105
2) 5 x 10-5
3) 5 x 10-15
4) 5 x 1015
Question3.
Nicotinic acid (Ka = 1.4 x 10-5) is represented by the formula HNiC. Calculate its per cent dissociation in a solution which contains 0.10 mole of nicotinic acid per 2 litre of solution.
Question4.
For the hypothetical reactions, the equilibrium constant (K) values are given:
A ⇌ B; K1 = 2;
B ⇌ C; K2 = 4;
C ⇌ D; K3 = 3
The equilibrium constant (K ) for the reaction A ⇌ D is:
1) 48
2) 6
3) 2.7
4) 24
Question5.
'If, in the reaction N2O4 (g) ⇌ 2NO2 (g), x is that part of N2O4 which dissociates, then the number of molecules at equilibrium will be:
a) 1
b) 3
c) 1 + x
d) (1+x)2
Question6.
The solubility of Sb2S3 in water is 1 x 10-5 mol/L at 298 K. What will be its solubility product?
a) 108 x 10-25
b) 1 x 10-25
c) 144 x 10-25
d) 126 x 10-24
Question7.
What is Buffer solution? Give general characteristics of Buffer solution.
Question8.
What is acid & base according to
1) Arrhenius theory
2) Bronsted-Lowry theory
3) Lewis Concept
Question9.
Suppose it is required to make a buffer solution of pH = 4, using acetic acid and sodium acetate. How much of sodium acetate is to be added to 1 litre of N/10 acetic acid? Dissociation constant of acetic acid = 1.8 x 10-5.
Question10.
What is the pH of the buffer solution containing 0.15 mol of NH4OH and 0.25 mol of NH4Cl? Kb for NH4OH is 1.98 x 10-5:
a) 10
b) 9
c) 9.2
d) 10.2
Question11.
The pKa of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA, in which 50% of the acid is ionised, is:
a) 7.0
b) 4.5
c) 2.5
d) 9.5
Question12.
A certain weak acid has Ka = 1.0 x 10-4. Calculate the equilibrium constant for its reaction with a strong base.
Question13.
The degree of hydrolysis of which of the following salt is independent of the concentration of salt solution?
a) CH3COONa
b) NH4Cl
c) CH3COONH4
d) NaCl
Question14.
Give Le Chatelier’s principle.
Question15.
Give general characteristics of Equilibria involving physical processes.
Question16.
State Equilibrium Law.
Question17.
Give Applications of Solubility Product and Common ion Effect.
Question18.
Mention conjugate base of each of the following:
H3O+, HF, HClO4, NH4+
Question19.
The pKa of weak acid HA is 4.80 and the pKb of a weak base BOH is 4.78. The pH of an
aqueous solution of corresponding salt BA will be:
a) 9.22
b) 9.58
c) 4.79
d) 7.01
Question20.
Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be
the H+ ion concentration in the mixture?
a) 3.7 x 10-3 M
b) 1.11 x 10-3 M
c) 1.11 x 10-4 M
d) 3.7 x 10-4 M
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In summary, problem-solving after learning a theoretical concept on CBSE Equilibrium Class 11 Chemistry is an essential part of the learning process. It enhances your understanding, critical thinking abilities, and retention of knowledge. Moreover, it equips you with valuable skills that are applicable in academic, personal, and professional contexts.
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Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.
All About Daily Practice Problems on Class 11 Chemistry Equilibrium NCERT Chapter 6
Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on Class 11 Chemistry Equilibrium NCERT Chapter 6 useful.
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