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Science (English Medium) कक्षा १२ - CBSE Important Questions for Chemistry

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Chemistry
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Hydrolysis of sucrose is called ______.

Appears in 2 question papers
Chapter: [10] Biomolecules
Concept: Classification of Carbohydrates >> Disaccharides

What is the role of sulphur in the vulcanisation of rubber?

Appears in 2 question papers
Chapter: [15] Polymers
Concept: Types of Polymerisation Reactions - Rubber

Write the names and structures of the monomers of the following polymers: Buna-N

Appears in 2 question papers
Chapter: [15] Polymers
Concept: Classification of Polymers> Based on Mode of Polymerisation

Write the names and structures of the monomers of the following polymers: Polyvinyl chloride

Appears in 2 question papers
Chapter: [15] Polymers
Concept: Classification of Polymers> Based on Structure

Write names and chemical formulae of monomers used in preparing Buna-N.

Appears in 2 question papers
Chapter: [15] Polymers
Concept: Types of Polymerisation Reactions - Rubber

Write the structures of monomers used the following polymers: 
Nylon - 6, 6

Appears in 2 question papers
Chapter: [15] Polymers
Concept: Types of Polymerisation Reactions - Condensation Polymerisation Or Step Growth Polymerisation

Is   a homopolymer or copolymer? Give reason. 

Appears in 2 question papers
Chapter: [15] Polymers
Concept: Types of Polymerisation Reactions - Copolymerisation

Write the monomers of the following polymer : 

Appears in 2 question papers
Chapter: [15] Polymers
Concept: Some Important Polymers

What is meant by the term ‘broad spectrum antibiotics’? Explain.

Appears in 2 question papers
Chapter: [16] Chemistry in Everyday Life
Concept: Compounds with Medicinal Properties >> Antimicrobials

Explain any two chemical methods of food preservation.

Appears in 2 question papers
Chapter: [16] Chemistry in Everyday Life
Concept: Chemicals in Food - Artificial Sweetening Agents and Food Preservatives

Iron (z=26) is highly ferromagnetic. Explain.

Appears in 1 question paper
Chapter: [1] Solid State
Concept: Properties of Solids: Magnetic Properties

Silver crystallises in FCC structure. If density of silver is 10.51 gcm-3, calculate the volume of unit cell. [Atomic mass of slive (Ag) = 108 gm-1]

Appears in 1 question paper
Chapter: [1] Solid State
Concept: Calculations Involving Unit Cell Dimensions

The major binding force in diamond is_______________ .

(a) Covalent bond                                                  

(b)  Ionic bond

(c) Metallic bond                                                   

(d)  Co-ordinate covalent bond

Appears in 1 question paper
Chapter: [1] Solid State
Concept: Classification of Crystalline Solids

What is the covalency of nitrogen in N2O5?

Appears in 1 question paper
Chapter: [1] Solid State
Concept: Classification of Crystalline Solids

8 g of glucose, C6H12O6 (Molar Mass = 180 g mol−1) is dissolved in 1 kg of water in a sauce pan. At what temperature will this solution boil? 

(Kb for water = 0.52 K kg mol−1, boiling point of pure water = 373.15 K)

Appears in 1 question paper
Chapter: [1] Solutions
Concept: Colligative Properties and Determination of Molar Mass >> Elevation of Boiling Point

What type of semiconductor is obtained when silicon is doped with boron? 

 

Appears in 1 question paper
Chapter: [1] Solid State
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors

What type of magnetism is shown in the following alignment of magnetic moments?

Appears in 1 question paper
Chapter: [1] Solid State
Concept: Properties of Solids: Magnetic Properties

What type of point defect is produced when AgCl is doped with CdCl2?

Appears in 1 question paper
Chapter: [1] Solid State
Concept: Imperfections in Solids - Introduction

Determine the osmotic pressure of a solution prepared by dissolving 2.5 × 10−2 g of K2SO4 in 2L of water at 25°C, assuming that it is completely dissociated.

(R = 0.0821 L atm K−1 mol−1, Molar mass of K2SO4 = 174 g mol−1)

Appears in 1 question paper
Chapter: [1] Solutions
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure

Give an example each of a molecular solid and an ionic solid.

Appears in 1 question paper
Chapter: [1] Solid State
Concept: Classification of Crystalline Solids
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CBSE Science (English Medium) कक्षा १२ Important Questions
Important Questions for CBSE Science (English Medium) कक्षा १२ Biology
Important Questions for CBSE Science (English Medium) कक्षा १२ Chemistry
Important Questions for CBSE Science (English Medium) कक्षा १२ Computer Science (C++)
Important Questions for CBSE Science (English Medium) कक्षा १२ Computer Science (Python)
Important Questions for CBSE Science (English Medium) कक्षा १२ English Core
Important Questions for CBSE Science (English Medium) कक्षा १२ English Elective - NCERT
Important Questions for CBSE Science (English Medium) कक्षा १२ Entrepreneurship
Important Questions for CBSE Science (English Medium) कक्षा १२ Geography
Important Questions for CBSE Science (English Medium) कक्षा १२ Hindi (Core)
Important Questions for CBSE Science (English Medium) कक्षा १२ Hindi (Elective)
Important Questions for CBSE Science (English Medium) कक्षा १२ History
Important Questions for CBSE Science (English Medium) कक्षा १२ Informatics Practices
Important Questions for CBSE Science (English Medium) कक्षा १२ Mathematics
Important Questions for CBSE Science (English Medium) कक्षा १२ Physical Education
Important Questions for CBSE Science (English Medium) कक्षा १२ Physics
Important Questions for CBSE Science (English Medium) कक्षा १२ Political Science
Important Questions for CBSE Science (English Medium) कक्षा १२ Psychology
Important Questions for CBSE Science (English Medium) कक्षा १२ Sociology
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