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State Kohlrausch’s law of independent migration of ions.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
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: Physical Properties of the Transition Elements (d-block)
Complete the following equation : MnO4- + 8H+ + 5e- →
Concept: Important Compounds of Transition Elements
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: Group 15 Elements - The Nitrogen Family >> Dinitrogen
Draw the structure of the semicarbazone of ethanal.
Concept: Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions
Why is the α-hydrogens of aldehydes and ketones are acidic in nature?
Concept: 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: Chemical Reactions of Amines - Electrophilic Substitution
Give simple chemical tests to distinguish between the following pair of compounds:
Benzaldehyde and Benzoic acid
Concept: Nomenclature of Amines
What is Hinsberg's reagent?
Concept: 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: Preparation of Amines
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
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: Physical Properties of the Transition Elements (d-block)
Write any two consequences of Lanthanoid Contraction.
Concept: F-block Elements >> The Lanthanoids
