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Write the equations involved in the following reactions : Williamson synthesis
Concept: Preparation of Ethers
Arrange the following in the order of the property indicated against set :
H2O, H2S, H2Se, H2Te − increasing acidic character.
Concept: Group 16 Elements - The Oxygen Family
What happens when Phenol is oxidised with Na2Cr2O7/H+?
Concept: Methods of Preparation of Phenols
What happens when Anisole is treated with CH3Cl/anhydrous AlCl3?
Concept: Chemical Reaction of Ethers - Electrophilic Substitution
Why carboxylic acid does not give reactions of carbonyl group?
Concept: Structure of the Carboxyl group
How will you convert ethanal into the following compound?
But-2-enal
Concept: Chemical Reactions of Aldehydes and Ketones - Reactions Due to α-hydrogen
How will you bring about the following conversion in not more than two steps?
Benzoic acid to Benzaldehyde
Concept: Chemical Reactions of Carboxylic Acids - Reactions Involving –COOH Group
Give reasons Acetylation of aniline reduces its activation effect.
Concept: Chemical Reactions of Aldehydes and Ketones - Reactions Due to α-hydrogen
Write the equation involved in the following reaction:
Etard reaction
Concept: Chemical Reactions of Aldehydes and Ketones - Other Reactions
What happens when propanone is treated with CH3MgBr and then hydrolysed?
Concept: Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions
What happens when methanal undergoes cannizzaro reaction?
Concept: Chemical Reactions of Aldehydes and Ketones - Other Reactions
Write the chemical equations involved in the following reactions:
Carbylamine reaction
Concept: Chemical Reactions of Amines - Carbylamine Reaction
Give reasons for the following: (CH3)2NH is more basic than (CH3)3N in an aqueous solution.
Concept: Physical Properties of Amines
Give reasons Although –NH2 is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline
Concept: Nomenclature of Amines
Arrange the following in the increasing order of their pKb values:
C6H5NH2, C2H5NH2, C6H5NHCH3
Concept: Preparation of Amines
Arrange the following in the increasing order of their pKb values:
C6H5NH2, C2H5NH2, C6H5NHCH3
Concept: Physical Properties of Amines
What is the difference between a nucleoside and nucleotide?
Concept: Structure of Nucleic Acids
Write the product obtained when D-glucose reacts with H2N − OH.
Concept: Classification of Carbohydrates >> Monosaccahrides
A 10% solution (by mass) of sucrose in water has freezing point of 269.15 K. Calculate the freezing point of 10% glucose in water, if freezing point of pure water is 273.15 K.
(Given: Molar mass of sucrose = 342 g mol−1, Molar mass of glucose = 180 g mol−1)
Concept: Preparation of Glucose
Give a reason for the following observations:
Amino acids behave like salts.
Concept: Classification of Amino Acids
