Name: Vishvas Chemistry Lab Activity Book With Practical Related Information Class 11th
Brand: Amit Book Depot
Price: 390 INR
Availability: InStock

Vishvas Chemistry Lab Activity Book With Practical Related Information for Class 11th is a meticulously designed laboratory manual authored by Sukhwinder Kaur and published by Vishvas Publications Pvt Ltd. This comprehensive guide is tailored for Class 11 students to master chemistry practical exams with confidence. The book integrates core experiments, viva voice questions, and investigatory projects under one cover, reducing the need for multiple reference materials.

The content is systematically divided into six major sections, plus exclusive investigatory projects.

Section A: Basic Laboratory Techniques – Lays the foundation for safe and accurate lab work. Students learn to cut and bend a glass tube, round off its edges, draw a jet, and bore a cork to fit a glass tube through the bore. These hands-on skills are critical for assembling laboratory apparatus without accidents.

Section B: Characterisation and Purification of Chemical Substances – Focuses on purification methods and physical constant determination. Students determine the melting point and boiling point of organic compounds, prepare pure copper sulphate crystals from crude samples, and crystallise potash alum and benzoic acid from impure samples. These exercises teach recrystallisation and impurity removal – key techniques in synthetic chemistry.

Section C: Experiments Based on pH – Offers extensive practice with indicator papers and universal indicator. Students determine the pH of everyday substances (lemon juice, milk, limewater, soil, and tap water) and compare pH values of strong vs. weak acids (HCl vs. acetic acid) and buffer systems (acetic acid with sodium acetate). The titration of strong base NaOH using a universal indicator is particularly useful for understanding neutralisation and pH change during titrations.

Section D: Chemical Equilibrium – Demonstrates Le Chatelier’s principle through two iconic experiments: shift in equilibrium between ferric and thiocyanate ions (colour change with concentration variation) and the cobalt complex equilibrium between [Co(H₂O)₆]²⁺ and chloride ions. These visual experiments clarify reversible reactions and ion concentration effects.

Section E: Quantitative Estimation / Analysis – Covers volumetric analysis thoroughly. Students learn to set up a chemical balance; prepare standard solutions (0.1 N oxalic acid, 0.1 M Na₂CO₃, and 2 M H₂SO₄ from 15 M stock); and determine normality and strength of NaOH and dilute HCl via titration. The inclusion of dilution calculations (e.g., preparing 250 ml 2M H₂SO₄ from 15M) strengthens molarity concepts.

Section F: Qualitative Analysis – Enables systematic salt analysis for cations (Pb²⁺, Cu²⁺, Fe³⁺, Al³⁺, Ni²⁺, Co²⁺, Mn²⁺, Zn²⁺, Ba²⁺, Sr²⁺, Ca²⁺, Mg²⁺, NH₄⁺) and anions (CO₃²⁻, S²⁻, Cl⁻, Br⁻, I⁻, NO₃⁻, CH₃COO⁻, PO₄³⁻, etc.). A separate experiment covers detection of nitrogen, sulphur, chlorine, bromine and iodine in organic compounds using Lassaigne’s test.

Investigatory Projects – Five ready-to-submit projects: rate of evaporation of different liquids, effect of acids/bases on fibre tensile strength, evaluation of commercial antacids, bacterial contamination in drinking water via sulphide ion test, and acidity study of different tea leaves. Each project follows the CBSE investigatory project format with aim, procedure, observation, and conclusion.

Published by Vishvas Publications Pvt. Ltd, this chemistry lab activity book includes practical related information like viva questions, precautions, and theoretical backup for each experiment. Ideal for CBSE, ISC, and other state board Class 11 students aiming for excellence in practical examinations.

Have Doubts Regarding This Product ? Ask Your Question

Q1

How to cut a glass tube safely in the lab?

A1

Use a triangular file to make a single deep scratch, then hold tube with both hands, thumbs on scratch, and apply gentle outward pressure to snap.
Q2

Why is a 60-degree bend in glass tube preferred in distillation setups?

A2

A 60-degree angle ensures smooth vapour flow without excessive condensation or breakage, unlike sharp 90-degree bends.
Q3

How do you bore a cork for fitting a glass tube?

A3

Select cork borer slightly smaller than tube diameter, lubricate, twist gently through cork, then insert glass tube carefully.
Q4

Which indicator is used to compare pH of 0.1 N HCl and 0.1 N acetic acid?

A4

Universal indicator or pH paper shows HCl at pH ~1 (red) and acetic acid at pH ~3 (orange-yellow) due to weaker dissociation.
Q5

Why is oxalic acid used to prepare a standard 0.1 N solution?

A5

Oxalic acid is a stable, primary standard that does not absorb moisture, allowing accurate weighing and precise normality.
Q6

How do you detect nitrogen in an organic compound?

A6

Prepare Lassaigne’s extract, add FeSO₄ and dilute H₂SO₄. Prussian blue colour confirms nitrogen.
Q7

How does a buffer resist pH change in acetic acid + sodium acetate?

A7

Added H⁺ is consumed by acetate ions; added OH⁻ is neutralised by acetic acid. pH remains nearly constant.
Q8

Which cation and anion are confirmed in copper sulphate crystals?

A8

Cu²⁺ (blue colour, turning deep blue with NH₃) and SO₄²⁻ (white precipitate with BaCl₂ insoluble in HCl).
Q9

How to detect iodine during organic compound analysis?

A9

In Lassaigne’s extract, add HNO₃ then AgNO₃ – yellow precipitate insoluble in NH₃ indicates iodine.
Q10

Which antacid shows highest acid-neutralising capacity in project work?

A10

Commercial antacids with aluminium hydroxide and magnesium hydroxide typically neutralise more HCl than simple calcium carbonate tablets.

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SECTION A: BASIC LABORATORY TECHNIQUES

1. To cut the given glass tube (or glass rod) and round off its edges.

2. To bend the given glass tube through an angle of 60.

3. To draw a jet from the given glass tube.

4. To bore a cork and fit a glass tube through the bore.

SECTION - B: CHARACTERISATION AND PURIFICATION OF CHEMICAL SUBSTANCES

1. To determine the melting point of the given organic compound.

2. To determine the boiling point of the given organic compound.

3. To prepare a pure sample of copper sulphate crystals from the given crude sample.

4. To prepare crystals of potash alum from the commercial sample.

5. To prepare a pure sample of benzoic acid from an impure sample.

SECTION - C: Experiments Based on pH

1. To determine pH values of the given solutions (washing soda solution, lemon juice, vinegar, limewater, milk, tomato juice, tap water, and soil) by using indicator papers/universal indicator.

2. To compare the pH values of 0.1 N HCl, 0.1 N H₂SO₄, 0.1 N acetic acid and 0.1 N oxalic acid.

3. To study the pH change in the titration of a strong base (0.1 N NaOH) using universal indicator.

4. To compare pH values of the following solutions by means of indicator papers.

- (a) Acetic acid versus acetic acid and sodium acetate solution.

- (b) Ammonium hydroxide versus ammonium hydroxide and ammonium chloride solution.

5. To compare the pH values of HCl solutions of different concentrations with the help of (i) pH paper and (ii) universal indicator solution.

SECTION - D: CHEMICAL EQUILIBRIUM

1. To study the shift in equilibrium between ferric ions and thiocyanate ions by increasing or decreasing the concentration of either ion.

2. To study the shift in equilibrium between [Co(H₂O)₆]²⁺ and chloride ions by changing the concentration of either ion.

SECTION - E: QUANTITATIVE ESTIMATION / ANALYSIS

1. To set up a chemical balance.

2. To prepare a standard solution (0.1 N) of oxalic acid.

3. To determine the normality and strength of the given solution of caustic soda (NaOH). You are provided with a 0.1 N oxalic acid solution.

4. To prepare a 0.1M Na₂CO₃ solution.

5. To determine the normality and strength of the given solution of dilute hydrochloric acid by titrating against 0.1 N Na₂CO₃ solution.

6. To prepare 250 ml of 2 M H₂SO₄ from the given 15 M H₂SO₄..

7. 8 grammes of crystalline oxalic acid are dissolved per litre of the given solution.

SECTION - F (a): Qualitative Analysis

1. To determine one cation and one anion from the following (insoluble salts to be excluded)

- Cations: Pb²⁺, Cu²⁺, As³⁺, Fe³⁺, Al³⁺, Ni²⁺, Co²⁺, Mn²⁺, Zn²⁺, Ba²⁺, Sr²⁺, Ca²⁺, Mg²⁺, NH₄⁺

- Anions: CO₂²⁻, S²⁻, SO₂²⁻, NO₂⁻, Cl⁻, Br⁻, I⁻, NO₃⁻, CH₃COO⁻, C₂O₄²⁻, and PO₄³⁻

(b): Detection of nitrogen, sulphur, chlorine, bromine and iodine in the given organic compound.

1. To detect nitrogen, sulphur, chlorine, bromine and iodine in the given organic compound

INVESTIGATORY PROJECTS

1. To study the rate of evaporation of different liquids.

2. To study the effect of acids and bases on the tensile strength of fibres.

3. To evaluate some commercial antacids.

4. To check the bacterial contamination in drinking water by testing the sulphide ion.

5. To study the acidity of different samples of tea leaves.