11th Standard CBSE Syllabus & Materials
11th Standard CBSE
CBSE 11th Economics PART-A - Presentation of Data - New Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Economics PART-A - Organisation of Data - New Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Economics PART-A - Collection of Data - New Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Economics PART-A - Introduction to Economics and Statistics - New Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Business Studies International Trade Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Business Studies Evolution and Fundamentals of Business Sample Question Papers Study Material - QB365 Set A
Published on: 21/10/2025
Download CBSE Class 11th Standard CBSE Chemistry question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Chemistry
Questions + Answers key
Take MCQ Chemistry Test
1.
In which of the following solvents is silver chloride most soluble?
0.1 mol dm-3 AgNO3 solution
0.1 mol dm-3 HCl solution
H2O
Aqueous ammonia
2.
For the reaction \(\mathbf{H}_{2}(g)+\mathbf{I}_{2}(g) \rightleftharpoons 2 \mathrm{HI}(g)\) the standard free energy is \(\Delta \mathbf{G}^{\Theta}>\mathbf{0} .\) The equilibrium constant (K) would be ________.
K = 0
K > 1
K = 1
K < 1
3.
Equal volume of following Ca2+ and F- solution are mixed. In which of the Solutions will precipitation occur? [KSP of CaF2 = 1.7 x 10-10]
10-2 M Ca2+ + 10-5 MF-
10-3 M Ca2+ and 10-3 MF-
10-2 M Ca2+ + 10-3 MF-
10-4 M Ca2+ and 10-5 MF-
4.
Which of the following salts will give highest pH in water?
KCI
NaCI
Na2CO3
CuSO4
5.
0.10 M CH3COOH is 1.34% ion is ed, calculate its Ka ______.
1.8 x 10-5
1.8 x 10-4
5 x 10-4
4 x 10-5
6.
\(\mathrm{PCl}_{5}(g) \rightleftharpoons \mathrm{PCl}_{3}\) if the degree of dissociation is α at equilibrium pressure 'p', then the equilibrium constant for the reaction is ______.
\(\mathrm{K}_{P}=\frac{\alpha^{2}}{1+\alpha^{2} p}\)
\(\mathrm{K}_{P}=\frac{\alpha^{2} p^{2}}{1-\alpha^{2}}\)
\(\mathrm{K}_{P}=\frac{\alpha p^{2}}{1-\alpha^{2}}\)
\(\mathrm{K}_{P}=\frac{\alpha^{2} p}{1-\alpha^{2}}\)
7.
The solubility product Ksp of the sparingly soluble salt Ag2CrO4 is 4 x 10-12. The molar solubility of the salt is _____.
\(1.0 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
\(2 \times 10^{-6} \mathrm{~mol} \mathrm{~L}^{-1}\)
\(1.0 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
\(2 \times 10^{-12} \mathrm{~mol} \mathrm{~L}^{-1}\)
8.
A solution of an acid has pH = 4.70. Find out the concentration of OH- ions (pKw = 14).
5 x10-10
6 x10-10
2 x10-10
9 x10-10
9.
In the following reaction, \(\underset{\text { Acid }}{\mathrm{H}_{2} \mathrm{O}(l)}+\underset{X}{\mathrm{H}_{2} \mathrm{O}(l)} \rightleftharpoons \underset{\begin{array}{c} \text { Conjugate } \\ \text { Acid } \end{array}}{\mathrm{H}_{3} \mathrm{O}^{+}(a q)}+\underset{Y}{\mathrm{O} \mathrm{H}^{-}(a q)}\) X and Y respectively are _____.
base and conjugate acid
acid and conjugate base
base and conjugate base
acid and conjugate acid
10.
Which one of the following informations can be obtained on the basis of Le-Chatelier principle?
Dissociation constant of a weak acid
Entropy change in a reaction
Equilibrium constant of a chemical reaction
All of the above
11.
In the reaction, \(\mathrm{C}(s)+\mathrm{CO}_{2}(g) \rightleftharpoons 2 \mathrm{CO}(g)\) when pressure is increased, the reaction goes in the _____.
forward direction
reverse direction
dynamic equilibrium
None of these
12.
Predict which of the following reaction will have appreciable concentration of reactants and products ?
\(\mathrm{Cl}_{2}(g) \rightleftharpoons 2 \mathrm{Cl}(g) ; K_{C}=5 \times 10^{-39}\)
\(\mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{NO}(\mathrm{g}) \rightleftharpoons 2 \mathrm{NOCl}(g) ; K_{C}=3.7 \times 10^{8}\)
\(\mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{NO}_{2}(g) \stackrel{\longrightarrow}{\rightleftharpoons} \mathrm{NO}_{2}(g) ; K_{C}=1.8\)
All have appreciable concentration of reactants and products
13.
The concentration of hydrogen ion in a sample of soft drink is 3.8 x 10-3M. What is its pH?
4.32
5.12
3.31
2.42
14.
One litre of a buffer solution containing 0.01 M NH4Cl and 0.1 M NH40H having pKb of 5 has pH of _____.
9
10
6
7
15.
100 mL of a solution contains 0.1 M NH4OH and 0.1MNH4Cl. The pH of the solution will not change on adding.
20 mL of 0.1 M NH4OH solution
20 mL of 0.1 M NH4Cl solution
10 mL of 0.1 M NaOH solution
10 mL of distilled water
1.
(b)
0.1 mol dm-3 HCl solution
2.
(d)
K < 1
3.
(c)
10-2 M Ca2+ + 10-3 MF-
4.
(c)
Na2CO3
5.
(a)
1.8 x 10-5
6.
(d)
\(\mathrm{K}_{P}=\frac{\alpha^{2} p}{1-\alpha^{2}}\)
7.
(a)
\(1.0 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
8.
(a)
5 x10-10
9.
(c)
base and conjugate base
10.
(d)
All of the above
11.
(b)
reverse direction
12.
(c)
\(\mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{NO}_{2}(g) \stackrel{\longrightarrow}{\rightleftharpoons} \mathrm{NO}_{2}(g) ; K_{C}=1.8\)
13.
(d)
2.42
14.
(b)
10
15.
(d)
10 mL of distilled water
11th Standard CBSE Syllabus & Materials
11th Standard CBSE
CBSE 11th Business Studies Forms of Business Organisation Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Business Studies Business, Trade and Commerce Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Physics Waves Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Physics Kinetic Theory Sample Question Papers Study Material - QB365 Set A
NCERT Books
Syllabus
Exam Pattern
Sample Question Papers
Previous year Question Papers
Important Notes
MCQ Practice test
NCERT Exemplers
Case study Questions
Image Based Questions
Passage based Questions
HOT Questions
Value Based Questions
Model Questions Papers
NCERT ( Book Back ) Questions
Assertion and Reason
Important Questions And Answers
CBSE 11th Standard CBSE Subjects
CBSE Standards
