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

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Chemistry
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Amides can be converted into amines by the reaction named ______.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Preparation of Amines

Assertion (A): Bromination of benzoic acid, gives m-bromobenzoic acid.

Reason (R): Carboxyl group increases the electron density at the meta position.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Chemical Reactions of Amines - Electrophilic Substitution

Arrange the decreasing order of pKb values.

\[\ce{C6H5NH2, C6H5NHCH3, C6H5CH2NH2, CH3NH2, NH3}\]

Appears in 1 question paper
Chapter: [9] Amines
Concept: Chemical Reactions of Amines - Basic Character of Amines

Arrange the increasing order of solubility in water.

\[\ce{C2H5Cl, C2H5NH2, C2H5OH}\]

Appears in 1 question paper
Chapter: [9] Amines
Concept: Classification of Amines

Arrange the decreasing boiling point.

\[\ce{CH3COOH, C2H5OH, CH3NH2, CH3OCH3}\]

Appears in 1 question paper
Chapter: [9] Amines
Concept: Physical Properties of Amines

Write the structural difference between starch and cellulose.

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Classification of Carbohydrates >> Polysaccharides

Which one of the following is a polysaccharide:

Starch, Maltose, Fructose, Glucose

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Classification of Carbohydrates >> Polysaccharides

Define the following term as related to proteins:

Denaturation

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Denaturation of Proteins

What do you understand by the term glycosidic linkage?

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Classification of Carbohydrates >> Disaccharides

What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Chemical Composition of Nucleic Acids

Differentiate between  the following:

Fibrous proteins and Globular proteins

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Structure of Proteins

The two strands in DNA are not identical but are complementary. Explain.

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Structure of Nucleic Acids

Which one of the following is a monosaccharide: 

 starch, maltose, fructose, cellulose

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Classification of Carbohydrates >> Monosaccahrides

What is the difference between acidic amino acids and basic amino acids?

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Biomolecules in the Cell > Proteins >> Amino Acids

Glucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose?

 

 
Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Structures of Glucose

Which component of starch is a branched polymer of α-glucose and insoluble in water?

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Preparation of Glucose

Deficiency of which vitamin causes scurvy?

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Classification of Vitamins

What type of linkage is responsible for the formation of proteins?

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Chemical Composition of Nucleic Acids

Write the product formed when glucose is treated with HI ?

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Chemical Composition of Nucleic Acids

 Write one example of a Natural polymer.

Appears in 1 question paper
Chapter: [10] Biomolecules
Concept: Denaturation of Proteins
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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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