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Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements.
Concept: F-block Elements > The Actinoids
What is Lanthanoid contraction?
Concept: F-block Elements > The Lanthanoids
On the basis of crystal field theory, write the electronic configuration for d4 ion if ∆0 < P.
Concept: Bonding in Coordination Compounds > Crystal Field Theory (CFT)
What type of deviation is shown by a mixture of ethanol and acetone? Give reason.
Concept: Vapour Pressure of Liquid > Vapour Pressure of Liquid- Liquid Solutions
The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume :
SO2Cl2 (g) → SO2 (g) + Cl2 (g)
| Experiment | Time/s–1 | Total pressure/atm |
| 1 | 0 | 0.4 |
| 2 | 100 | 0.7 |
Calculate the rate constant.
(Given : log 4 = 0.6021, log 2 = 0.3010)
Concept: Factors Influencing Rate of a Reaction
The conversion of molecules A to B follow second order kinetics. If concentration of A is increased to three times, how will it affect the rate of formation of B?
Concept: Factors Influencing Rate of a Reaction
Give reasons: Transition metals show variable oxidation states.
Concept: General Properties of the Transition Elements (D-block)
Complete the following equation : MnO4- + 8H+ + 5e- →
Concept: Some Important Compounds of Transition Elements - Oxides and Oxoanions of Metals
How do you prepare:
Actinoid elements show wide range of oxidation states.
Concept: F-block Elements > The Actinoids
Account for the following : Nitrogen does not form pentahalide.
Concept: p-Block elements of Group 15 Elements > Dinitrogen
Draw the structure of the semicarbazone of ethanal.
Concept: Aldehydes and Ketones > Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions
Write chemical test to distinguish between the following compounds:
Phenol and Benzoic acid
Concept: Aldehydes and Ketones > Chemical Reactions of Aldehydes and Ketones - Oxidation
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
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
