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How would you account for the following: Transition metals form complex compounds.
Concept: General Properties of the Transition Elements (D-block)
Account for the following:
E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+.
Concept: General Properties of the Transition Elements (D-block)
Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements.
Concept: F-block Elements >> The Actinoids
Give reasons for the following:
The transition metals generally form coloured compounds.
Concept: General Properties of the Transition Elements (D-block)
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)
Explain the following reaction:
Wolff-Kishner reduction
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Reduction
Explain the following reaction:
Cannizzaro reaction
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Other 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 vitamin C cannot be stored in our body?
Concept: Vitamins >> Classification of Vitamins
Define azeotropes.
Concept: Vapour Pressure of Liquid >> Vapour Pressure of Liquid- Liquid Solutions
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
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: 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
How do you convert Chlorobenzene to biphenyl?
Concept: Introduction of Haloalkanes and Haloarenes
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
