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Write the structure of the product when chlorobenzene is treated with methyl chloride in the presence of sodium metal and dry ether.
Concept: Compounds of Halogens
Write the structure of the alkene formed by dehydrohalogenation of 1-Bromo-1methylcyclohexane with alcoholic KOH.
Concept: Compounds of Halogens
Write the structures of the main products in the following reactions :
Concept: Chemical Reaction of Ethers - Cleavege of C-O Bonds
Give reasons H3PO3 undergoes disproportionation reaction but H3PO4 does not.
Concept: Concept of Group 15 Elements
Give reasons When Cl2 reacts with the excess of F2, ClF3 is formed and not FCl3.
Concept: Concept of Group 15 Elements
Give reasons Dioxygen is a gas while Sulphur is a solid at room temperature.
Concept: P - Block Group 16 Elements >> Sulphur - Allotropic Forms
Account for the following:
Aromatic carboxylic acids do not undergo Friedel-Crafts reaction.
Concept: Acids >> Structure of the Carboxyl group
Give reason for the following:
Primary amines have higher boiling point than tertiary amines.
Concept: Physical Properties of Amines
Illustrate the following reaction giving suitable example in each case: Diazotisation
Concept: Diazonium Salts >> Method of Preparation of Diazonium Salts
Give reason (CH3)2NH is more basic than (CH3)3N in an aqueous solution.
Concept: Physical Properties of Amines
Give reason Aromatic diazonium salts are more stable than aliphatic diazonium salts.
Concept: Physical Properties of Diazonium Salts
Write the structures of the main products of the following reactions:
Concept: Amines >> Chemical Reactions of Amines - Basic Character of Amines
Write the structures of the main products of the following reactions:
Concept: Amines >> Chemical Reactions of Amines - Basic Character of Amines
Write the structures of the main products of the following reactions:
Concept: Amines >> Chemical Reactions of Amines - Basic Character of Amines
Define the following with an example of each
Polysaccharides
Concept: Biomolecules in the Cell > Carbohydrates >> Polysaccharides - Starch, Cellulose and Glycogen
Define the following with an example
Denatured protein
Concept: Biomolecules in the Cell > Proteins >> Denaturation of Proteins
Write the product when D-glucose reacts with conc. HNO3.
Concept: Biomolecules in the Cell > Carbohydrates >> Structures of Glucose
Write one difference between α-helix and β-pleated structures of proteins.
Concept: Biomolecules in the Cell > Proteins >> Structure of Proteins
Shyam went to a grocery shop to purchase some food items. The shopkeeper packed all the items in polythene bags and gave them to Shyam. But Shyam refused to accept the polythene bags and asked the shopkeeper to pack the items in paper bags. He informed the shopkeeper about the heavy penalty imposed by the government for using polythene bags. The shopkeeper promised that he would use paper bags in future in place of polythene bags.
1) Write the values (at least two) shown by Shyam.
2) Write one structural difference between low-density polyethene and high-density polyethene.
3) Why did Shyam refuse to accept the items in polythene bags?
4) What is a biodegradable polymer? Give an example.
Concept: Introduction to Polymers >> Classification of Polymers Based on Mode of Polymerisation
What is tincture of iodine? What is its use?
Concept: Therapeutic Action of Different Classes of Drugs - Antimicrobials
