Advertisements
Advertisements
Why is the α-hydrogens of aldehydes and ketones are acidic in nature?
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Reactions Due to α-hydrogen
Account for the following:
Although the amino group is o, p-directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.
Concept: Amines >> Chemical Reactions of Amines - Electrophilic Substitution
Give simple chemical tests to distinguish between the following pair of compounds:
Benzaldehyde and Benzoic acid
Concept: Amines >> Nomenclature of Animes
What is Hinsberg's reagent?
Concept: Amines >> Chemical Reactions of Amines - Reaction with Arylsulphonyl Chloride
Give reasons for the following:
Ammonolysis of alkyl halides is not a good method to prepare pure primary amines.
Concept: Amines >> Preparation of Amines
State Henry’s law.
Concept: Solubility >> Solubility of a Gas in a Liquid
A solution containing 15 g urea (molar mass = 60 g mol–1) per litre of solution in water has the same osmotic pressure (isotonic) as a solution of glucose (molar mass = 180 g mol–1) in water. Calculate the mass of glucose present in one litre of its solution.
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
State Henry’s law.
Concept: Solubility >> Solubility of a Gas in a Liquid
Define limiting molar conductivity.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Show that the time required for 99% completion is double of the time required for the completion of 90% reaction.
Concept: Half Life Period of a Reaction
Identify the order of reaction from the following unit for its rate constant:
L mol–1 s–1
Concept: Factors Influencing Rate of a Reaction
How would you account for the following:
The chemistry of actinoids is more complicated as compared to lanthanoids.
Concept: F-block Elements >> The Actinoids
Account for the following:
Zn is not considered as a transition element.
Concept: General Properties of the Transition Elements (D-block)
Write any two consequences of Lanthanoid Contraction.
Concept: F-block Elements >> The Lanthanoids
Give reasons for the following statement:
Zn, Cd, and Hg are soft metals.
Concept: General Properties of the Transition Elements (D-block)
Define coagulation.
Concept: Properties of Colloidal Solutions
Name the method of refining of metals such as Germanium.
Concept: Refining of Crude Metals
What is the role of silica in the extraction of copper?
Concept: Occurrence of Metals
Give simple chemical tests to distinguish between the following pairs of compounds: Benzoic acid and Phenol
Concept: Chemical Properties of Phenol
How do you convert the following :
Phenol to anisole
Concept: Preparation of Ethers
