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Why is the boiling point of aldehydes and ketones lower than that of corresponding carboxylic acids?
Concept: Physical Properties of Aldehydes and Ketones
An organic compound 'A' with molecular formula C5H8O2 is reduced to n-pentane with hydrazine followed by heating with NaOH and glycol. 'A' forms a dioxime with hydroxylamine and gives a positive iodoform and Tollen's test. Identify 'A' and give its reaction for iodoform and Tollen's test.
Concept: Chemical Reactions of Aldehydes and Ketones - Oxidation
Give a chemical test to distinguish between ethanal acid and ethanoic acid.
Concept: Physical Properties of Aldehydes and Ketones
An organic compound 'A' with the molecular formula C4H8O2 undergoes acid hydrolysis to form two compounds 'B' and 'C'. Oxidation of 'C' with acidified potassium permanganate also produces 'B'. Sodium salt of 'B' on heating with soda lime gives methane.
- Identify 'A', 'B' and 'C'.
- Out of 'B' and 'C', which will have higher boiling point? Give reason.
Concept: Chemical Reactions of Aldehydes and Ketones - Oxidation
Arrange the following: C2H5NH2, C2H5OH, (CH3)3N – in the increasing order of their boiling point
Concept: Physical Properties of Amines
Write the structures of A, B and C in the following:
Concept: Chemical Reaction of Diazonium Salts - Reactions Involving Displacement of Nitrogen
An aromatic compound 'A' of molecular formula C7H7ON undergoes a series of reactions as shown below. Write the structures of A, B, C, D and E in the following reactions :
Concept: Preparation of Amines
Write the structures of main products when aniline reacts with the following reagents :
Br2 water
Concept: Chemical Reactions of Amines - Electrophilic Substitution
Write the structures of main products when aniline reacts with the following reagents : HCl
Concept: Chemical Reactions of Amines - Basic Character of Amines
Write the structures of main products when aniline reacts with the following reagents :
(CH3CO)2O/pyridine
Concept: Chemical Reactions of Amines - Electrophilic Substitution
Give a simple chemical test to distinguish between the following pair of compounds :
(CH3)2NH and (CH3)3N
Concept: Chemical Reactions of Amines - Reaction with Arylsulphonyl Chloride
Give the structures of A, B and C in the following reactions :
Concept: Preparation of Amines
Give the structures of A, B and C in the following reactions :
Concept: Preparation of Amines
Account for the following:
pKb of aniline is more than that of methylamine.
Concept: Nomenclature of Amines
How will you convert ethanoic acid into methanamine?
Concept: Nomenclature of Amines
Give reasons CH3NH2 is more basic than C6H5NH2.
Concept: Physical Properties of Amines
Do the following conversions in not more than two steps :
Ethyl benzene to Benzoic acid
Concept: Nomenclature of Amines
Do the following conversions in not more than two steps :
Propanone to Propene
Concept: Nomenclature of Amines
Orange colour of `Cr_2O_7^(2–)` ion changes to yellow when treated with an alkali. Why?
Concept: Chemical Reactions of Amines - Alkylation and Acylation
Which alkyl halide from the following pair is chiral and undergoes faster SN2 reaction?
Concept: Chemical Reactions of Amines - Alkylation and Acylation
