CBSE Class 11 Chemistry Some Basic Concepts Worksheet Set C

Access the latest CBSE Class 11 Chemistry Some Basic Concepts Worksheet Set C. We have provided free printable Class 11 Chemistry worksheets in PDF format, specifically designed for Chapter 1 Some Basic Concepts of Chemistry. These practice sets are prepared by expert teachers following the 2025-26 syllabus and exam patterns issued by CBSE, NCERT, and KVS.

Chapter 1 Some Basic Concepts of Chemistry Chemistry Practice Worksheet for Class 11

Students should use these Class 11 Chemistry chapter-wise worksheets for daily practice to improve their conceptual understanding. This detailed test papers include important questions and solutions for Chapter 1 Some Basic Concepts of Chemistry, to help you prepare for school tests and final examination. Regular practice of these Class 11 Chemistry questions will help improve your problem-solving speed and exam accuracy for the 2026 session.

Download Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry Worksheet PDF

SOME BASIC CONCEPTS IN CHEMISTRY
 
I. Multiple Choice Question:
 
1. Which of the following is dependent of temperature?
 
(a) Molarity            (b) Molality           (c) Mole fraction     (d) Mass percentage.
 
2. The number of oxygen atoms in 4.4g of CO2 is approximately-
 
(a) 1.2 × 1023       (b) 6 × 1022         (c) 6 × 1023         (d) 12 × 1023
 
3. What will be the molarity of a solution, which contains 5.85g of NaCl(s) per 500ml.
 
(a) 4 mole/Lit        (b) 20 mole/Lit      (c) 0.2 mole/L       (d) 2mol/Lit
 
4. The empirical formula and molecular mass of a compound are CH2O and 180g respectively. What will be the molecular formula of the compound?
 
(a) C9H18O9         (b) CH2O              (c) C6H12O6        (d) C2H4O2
 
5. A gaseous hydrocarbon gives upon combustion, 0.72 g of water and 3.08 g of CO2. The empirical formula of the hydrocarbon is:
 
(a) C6H5               (b) C7H8              (c) C2H4              (d) C3H4
 

II. Fill in the Blanks:
 
1. The number of Li atoms in _____________ g. is 6.022×1024 atoms.
 
2.Number of atoms of oxygen in 24 g of O3 is _____________.
 
3.A mixture having 2 g of H2 and 32 g of oxygen occupies a volume of _____________ at NTP.
 
4.The mass of one molecule of carbon dioxide is _____________.
 
5.Number of carbon atoms present in 18 g of glucose (C6H12O6) is ______________.
 
III. ASSERTIONAND REASONINIG QUESTIONS:
 
Directions for Q. No.1-5
 
A If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
 
B If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
 
C If Assertion is true statement but Reason is false.
 
D If both Assertion and Reason are false statements.
 
1. Assertion: A solution of table salt in a glass of water is homogeneous
Reason: A solution having same composition throughout is heterogeneous
 
2. Assertion: The molecular weight of oxygen is 32 amu.
Reason: The atomic weight of oxygen is 16 amu
 
3. Assertion: No of moles of H2 in 0.224 L of hydrogen is 0.01 mole.
Reason: 22.4 L of H2 at STP contain 6.023 × 1023 moles.
 
4. Assertion: Atomic mass of Na is 23.
Reason: An atom of sodium is 23 times heavier than 1/12th mass of C-12 isotope.
 
5. Assertion: Number of atoms of He in 60 u of He is 15.
Reason: Atomic weight of He is 4 u.
 
IV. Descriptive Questions:
 
1. State the following laws:
i) Avogadro’s law
ii) Law of constant proportion
iii) Gay Lussac’s law
 
2. If the density of methanol is 0.793kgl-1 What is its volume needed for making 2.5l of its 0.25 M solution?
 
3. Why do atomic masses of most of the elements in atomic mass unit involve fraction?
 
4. 200ml of 0.05M magnesium chloride is mixed with 75ml of 0.1M silver nitrate solution. Find the number of moles and mass in grams of AgCl formed. What is the limiting reagent?
 
5. 24g of NaOH is dissolved in 300ml water. Calculate the molarity of the solution.
 
6. 4.8g of O2 was used to burn 0.15moles of Fe to Fe2O3. What mass of Fe2O3 was formed?
 
7. (i) What do you understand by the term limiting reagent?
(ii) 6.5g of Zn was reacted with excess of dil. HCl. Calculate the amount and volume of hydrogen produced at STP.
 
8. A compound contains 2.68% Mg. How many atoms of magnesium are present in 15g of the compound?
 
9. Calculate the percentage of (i) copper (ii) Sulphur (iii) Oxygen and (iv) water of hydration in crystalline copper sulphate, CuSO4.5H2O
 
10. 1.8g of an organic compound on combustion gave 2.64g of CO2 and 1.08g of water. Find the empirical formula of the compound.
 
11. In three moles of ethane C2 H6, calculate the following
i) Number of moles of C atoms
ii) Number of moles of Hydrogen atoms
iii) Number of molecules of ethane.
 
12. Calculate the number of atoms and molecules in 224ml of Nitrogen gas at STP.
 
13. Carbon and oxygen combine to give two compounds. The carbon content in one is 42.9% and in the other it is 27.3%. How does this illustrate the law of multiple proportions?
 
14. Commercially available H2SO4 contains 98% acid by mass. Find the molarity if density of the sample is 1.84g/cc. What volume of this acid is required to make 2 L of 0.1 M solution?
 
15. Find the number of atoms of each type in 3.42g of sucrose (C12H22O11).
 
16. How many atoms are there in a) 72 amu of Carbon b) 72 g of carbon?
 
17. How many atoms of hydrogen are there in 51g of ammonia?
 
18. 400 mL each of H2 and O2 are mixed and ignited, find volume of water vapour formed?
 
19. What mass C12 will contain the same number of atoms as in 3.6g of O16?
 
20. Calculate mass of CO2 containing same number of oxygen atoms as in 3g of NO.
 
21. From 0.2g of CO2, 1021 molecules are removed. How many of moles of CO2 remain?
 
22. (i) Define the terms empirical formula and molecular formula.
 
(ii) A hydrocarbon on burning gave 3.38g of CO2 and 0.69g of H2O. 10 L of the gas at STP weighs 11.6g. Find empirical and molecular formula.
 
23. Aqueous magnesium chloride solution is marketed as 20% by mass. Its density is 1.18 g/ml. Calculate
(i) The mole fraction of each component
(ii) Molarity.
(iii) Molality
(iv) The concentration in ppm.
 
24. Define (i) ppm, (ii) molarity, (iii) molality and (iv) mole fraction


Please click on below link to download CBSE Class 11 Chemistry Some Basic Concepts Worksheet Set C

Chapter 01 Some Basic Concepts of Chemistry
CBSE Class 11 Chemistry Some Basic Concepts of Chemistry Worksheet Set A
CBSE Class 11 Chemistry Some Basic Concepts of Chemistry Worksheet Set B
CBSE Class 11 Chemistry Some Basic Concepts Worksheet Set A
CBSE Class 11 Chemistry Some Basic Concepts Worksheet Set B
CBSE Class 11 Chemistry Some Basic Concepts Worksheet Set C
CBSE Class 11 Chemistry Some Basic Concepts Worksheet Set D
CBSE Class 11 Chemistry Some Basic Principles And Techniques Worksheet
CBSE Class 11 Mole Concept Percentage Composition Worksheet
CBSE Class 11 Properties of Matter and their Measurement Worksheet A
CBSE Class 11 Stoichiometry and Stoichiometric Calculations Worksheet A
CBSE Class 11 Uncertainty in Measurement Worksheet A
Chapter 02 Structure of Atom
CBSE Class 11 Atomic Models Worksheet A
CBSE Class 11 Bohrs Model of an atom Worksheet A
CBSE Class 11 Chemistry Structure of Atom Worksheet Set A
CBSE Class 11 Chemistry Structure of Atom Worksheet Set A
CBSE Class 11 Chemistry Structure of Atom Worksheet Set B
CBSE Class 11 Chemistry Structure of Atom Worksheet Set B
CBSE Class 11 Chemistry Structure of Atom Worksheet Set C
CBSE Class 11 Chemistry Structure of Atom Worksheet Set C
CBSE Class 11 Chemistry Structure of Atom Worksheet Set D
CBSE Class 11 Discovery of Sub Atomic Particles Worksheet A
CBSE Class 11 Orbitals and Quantum Numbers Worksheet A
CBSE Class 11 Quantum Mechanical Model of the Atom Worksheet A
Chapter 03 Classification of Elements and Periodicity in Properties
CBSE Class 11 Chemical Properties of Element Worksheet A
CBSE Class 11 Chemistry Classification of Element And Periodicity In Properties Worksheet
CBSE Class 11 Chemistry Classification of Elements and Periodicity in Properties Worksheet Set A
CBSE Class 11 Chemistry Classification of Elements and Periodicity in Properties Worksheet Set B
CBSE Class 11 Chemistry Periodic Classification Worksheet
CBSE Class 11 Genesis of Periodic Classification Worksheet A
CBSE Class 11 Modern Periodic law and Nomenclature Worksheet A
CBSE Class 11 Trends in Physical Properties of Elements Worksheet A
Chapter 04 Chemical Bonding and Molecular Structure
CBSE Class 11 Chemical Bonding Kossel Lewis approach Worksheet A
CBSE Class 11 Chemical Bonding and Molecular Structure Worksheet A
CBSE Class 11 Chemistry Chemical Bonding and Molecular Structure Worksheet Set A
CBSE Class 11 Chemistry Chemical Bonding And Molecular Structure Worksheet Set A
CBSE Class 11 Chemistry Chemical Bonding and Molecular Structure Worksheet Set B
CBSE Class 11 Chemistry Chemical Bonding And Molecular Structure Worksheet Set B
CBSE Class 11 Chemistry Chemical Bonding and Molecular Structure Worksheet Set C
CBSE Class 11 Chemistry Chemical Bonding And Molecular Structure Worksheet Set C
CBSE Class 11 Hybridisation Worksheet A
CBSE Class 11 Ionic Bonding Worksheet A
CBSE Class 11 Molecular Orbital Theory Worksheet A
Chapter 05 Thermodynamics
CBSE Class 11 Application of Thermodynamic state Functions Worksheet A
CBSE Class 11 Chemistry Thermodynamics Worksheet Set A
CBSE Class 11 Chemistry Thermodynamics Worksheet Set B
CBSE Class 11 Chemistry Thermodynamics Worksheet Set B
CBSE Class 11 Chemistry Thermodynamics Worksheet Set C
CBSE Class 11 Chemistry Thermodynamics Worksheet Set D
CBSE Class 11 Enthalpy Change of a Reaction Worksheet A
CBSE Class 11 Spontaneity Worksheet A
CBSE Class 11 Thermodynamic Terms Worksheet A
Chapter 06 Equilibrium
CBSE Class 11 Applications of Equilibrium constants Worksheet A
CBSE Class 11 Buffer solution and solubility Product Worksheet A
CBSE Class 11 Chemistry Equilibrium Worksheet Set A
CBSE Class 11 Chemistry Equilibrium Worksheet Set A
CBSE Class 11 Chemistry Equilibrium Worksheet Set B
CBSE Class 11 Chemistry Equilibrium Worksheet Set B
CBSE Class 11 Chemistry Equilibrium Worksheet Set C
CBSE Class 11 Equilibrium in Chemical processes Worksheet A
CBSE Class 11 Equilibrium in physical processes Worksheet A
CBSE Class 11 Factors Affecting Equilibria Worksheet A
CBSE Class 11 Ionic Equilibrium In solution Worksheet A
CBSE Class 11 Ionization of Acids and Bases Worksheet A
Chapter 07 Redox Reactions
CBSE Class 11 Balancing of Redox Reactions Worksheet A
CBSE Class 11 Chemistry Redox Reaction Worksheet Set A
CBSE Class 11 Chemistry Redox Reactions Worksheet Set A
CBSE Class 11 Chemistry Redox Reactions Worksheet Set B
CBSE Class 11 Oxidation and Reduction Reactions Worksheet A
CBSE Class 11 Redox Reactions and Electrode Processes Worksheet A
CBSE Class 11 Redox Reactions in terms of Electron Transfer reactions Worksheet A
CBSE Class 11 Types of Redox Reduction Worksheet A
Chapter 08 Organic Chemistry – Some Basic Principles & Techniques
CBSE Class 11 Chemistry Organic Chemistry Worksheet
CBSE Class 11 Chemistry Organic Chemistry Worksheet Set A
CBSE Class 11 Chemistry Organic Chemistry Worksheet Set B
CBSE Class 11 Chemistry Organic Chemistry Worksheet Set C
CBSE Class 11 Classification of Organic Compounds Worksheet A
CBSE Class 11 Fundamental Concepts in Organic Reaction Mechanism Worksheet A
CBSE Class 11 Methods of Purification of Organic Compounds Worksheet A
CBSE Class 11 Nomenclature of Organic Compounds and Isomerism Worksheet A
CBSE Class 11 Qualitative Analysis of Organic Compounds Worksheet A
CBSE Class 11 Tetra valence of Carbon Worksheet A
Chapter 09 Hydrocarbons
CBSE Class 11 Alkenes Structure and Isomerism Worksheet A
CBSE Class 11 Alkynes Worksheet A
CBSE Class 11 Aromatic Hydrocarbon Worksheet A
CBSE Class 11 Chemical and Physical Properties of Alkanes Worksheet A
CBSE Class 11 Chemistry Hydrocarbons Worksheet Set A
CBSE Class 11 Chemistry Hydrocarbons Worksheet Set A
CBSE Class 11 Chemistry Hydrocarbons Worksheet Set B
CBSE Class 11 Chemistry Hydrocarbons Worksheet Set B
CBSE Class 11 Classification of Hydrocarbons Alkanes Worksheet A
CBSE Class 11 Preparation of Alkanes Worksheet A
CBSE Class 11 Preparation of Alkenes Worksheet A
CBSE Class 11 Preparation of Alkynes Worksheet A
CBSE Class 11 Properties of Alkenes Worksheet A
CBSE Class 11 Properties of Alkynes Worksheet A
z More Worksheets for Class 11 Chemistry
CBSE Class 11 Acid Rain and Photochemical Smog Worksheet A
CBSE Class 11 Bond Order Resonance structure and Polarity of bonds Worksheet A
CBSE Class 11 Chemistry Analysis of Inorganic Salt Worksheet
CBSE Class 11 Chemistry Determination of PH Worksheet
CBSE Class 11 Chemistry Project Worksheet
CBSE Class 11 Chemistry Worksheet Set A Solved
CBSE Class 11 Chemistry Worksheet Set B Solved
CBSE Class 11 Chemistry Worksheet Set C Solved
CBSE Class 11 Chemistry Worksheet Set D Solved
CBSE Class 11 Chemistry Worksheet Set E Solved
CBSE Class 11 Chemistry Worksheet Set F Solved
CBSE Class 11 Chemistry Worksheet Set G Solved
CBSE Class 11 Chemistry Worksheet Set H Solved
CBSE Class 11 Chemistry Worksheet Set I Solved
CBSE Class 11 Global Warming and Greenhouse Effect Worksheet A
CBSE Class 11 Heat Capacity Worksheet A
CBSE Class 11 Miscellaneous Questions Worksheet A
CBSE Class 11 Photoelectric Effect Worksheet A
CBSE Class 11 Preparation of Benzene Worksheet A
CBSE Class 11 Properties of Benzene Worksheet A
CBSE Class 11 Resonance structure and Resonance effect Worksheet A
CBSE Class 11 Sigma and pi bond Worksheet A
~ Class 11 Chemistry (Old Chapters)
CBSE Class 11 Atmospheric Pollution Worksheet A
CBSE Class 11 Behaviour of Real Gases Worksheet A
CBSE Class 11 Chemistry Environmental Chemistry Worksheet
CBSE Class 11 Chemistry Environmental Chemistry Worksheet Set A
CBSE Class 11 Chemistry Environmental Chemistry Worksheet Set B
CBSE Class 11 Chemistry Environmental Worksheet
CBSE Class 11 Chemistry Hydrogen Worksheet Set A
CBSE Class 11 Chemistry Hydrogen Worksheet Set A
CBSE Class 11 Chemistry Hydrogen Worksheet Set B
CBSE Class 11 Chemistry Hydrogen Worksheet Set B
CBSE Class 11 Chemistry P-Block Elements Worksheet Set A
CBSE Class 11 Chemistry P-Block Elements Worksheet Set B
CBSE Class 11 Chemistry P-Block Elements Worksheet Set C
CBSE Class 11 Chemistry P-Block Elements Worksheet Set C
CBSE Class 11 Chemistry S-Block Elements Worksheet Set A
CBSE Class 11 Chemistry S-Block Elements Worksheet Set B
CBSE Class 11 Chemistry States of Matter Worksheet Set A
CBSE Class 11 Chemistry States of Matter Worksheet Set A
CBSE Class 11 Chemistry States of Matter Worksheet Set B
CBSE Class 11 Chemistry The p-Block Elements Worksheet Set A
CBSE Class 11 Chemistry The s-Block Elements Worksheet Set A
CBSE Class 11 Chemistry The s-Block Elements Worksheet Set B
CBSE Class 11 General Characteristics of Compounds of the Alkaline Earth Metals Worksheet A
CBSE Class 11 General Characteristics of p-block elements Worksheet A
CBSE Class 11 General Characteristics of the Compounds of the alkali metals Worksheet A
CBSE Class 11 Group 1 Elements Alkali Metals Worksheet A
CBSE Class 11 Group 2 Alkaline Earth Metals Worksheet A
CBSE Class 11 Group 13 Elements The Boron Tamely Worksheet A
CBSE Class 11 Group 14 Elements The Carbon family Worksheet A
CBSE Class 11 Hydrides Worksheet A
CBSE Class 11 Hydrogen Peroxide Worksheet A
CBSE Class 11 Ideal Gas equation Worksheet A
CBSE Class 11 Important Compounds of Calcium Worksheet A
CBSE Class 11 Important Compounds of Carbon and Silicon Worksheet A
CBSE Class 11 Important trends and Anomalous Behaviour of Carbon Worksheet A
CBSE Class 11 Intermolecular forces Worksheet A
CBSE Class 11 Liquid state Worksheet A
CBSE Class 11 Matter and its Classification Worksheet A
CBSE Class 11 Properties of Dihydrogen Worksheet A
CBSE Class 11 Properties and Preparation of Hydrogen Worksheet A
CBSE Class 11 Some Important compounds of sodium Worksheet A
CBSE Class 11 The Gaseous State and The Gas Laws Worksheet A
CBSE Class 11 Water and Soil Pollution Worksheet A
CBSE Class 11 Water Worksheet A

Important Practice Resources for Class 11 Chemistry

Chapter 1 Some Basic Concepts of Chemistry CBSE Class 11 Chemistry Worksheet

Students can use the Chapter 1 Some Basic Concepts of Chemistry practice sheet provided above to prepare for their upcoming school tests. This solved questions and answers follow the latest CBSE syllabus for Class 11 Chemistry. You can easily download the PDF format and solve these questions every day to improve your marks. Our expert teachers have made these from the most important topics that are always asked in your exams to help you get more marks in exams.

NCERT Based Questions and Solutions for Chapter 1 Some Basic Concepts of Chemistry

Our expert team has used the official NCERT book for Class 11 Chemistry to create this practice material for students. After solving the questions our teachers have also suggested to study the NCERT solutions  which will help you to understand the best way to solve problems in Chemistry. You can get all this study material for free on studiestoday.com.

Extra Practice for Chemistry

To get the best results in Class 11, students should try the Chemistry MCQ Test for this chapter. We have also provided printable assignments for Class 11 Chemistry on our website. Regular practice will help you feel more confident and get higher marks in CBSE examinations.

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