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Account for the following:
Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows oxidation state of +4.
Concept: Physical Properties of the Transition Elements (d-block)
Account for the following:
Cu+2 salts are coloured, while Zn2+ salts are white.
Concept: Physical Properties of the Transition Elements (d-block)
Give a reason for the following:
Actinoids show irregularities in their electronic configurations.
Concept: F-block Elements >> The Actinoids
Give an example and suggest a reason for the following feature of the transition metal chemistry:
The lowest oxide of transition metal is basic, the highest is amphoteric/acidic.
Concept: Important Compounds of Transition Elements
Account for the following:
Mn2+ is more stable than Fe2+ towards oxidation to +3 state.
Concept: Electronic Configurations of the d-block Elements
Why \[\ce{HCl}\] should not be used for potassium permanganate titrations?
Concept: Important Compounds of Transition Elements
Account for the following:
Transition metals form alloys.
Concept: Physical Properties of the Transition Elements (d-block)
Account for the following:
Sc3+ is colourless whereas Ti3+ is coloured in an aqueous solution.
Concept: Physical Properties of the Transition Elements (d-block)
What is the reason for the stability of colloidal sols?
Concept: Properties of Colloidal Solutions
Define the following term:
Zeta potential
Concept: Properties of Colloidal Solutions
[NiCl4]2− is paramagnetic, while [Ni(CO)4] is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)
Concept: Bonding in Coordination Compounds >> Valence Bond Theory (VBT)
Write one similarity between Physisorption and Chemisorption
Concept: Types of Adsorption
Following compounds are given to you :
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
1) Write the compound which is most reactive towards SN2 reaction.
2) Write the compound which is optically active.
3) Write the compound which is most reactive towards β-elimination reaction.
Concept: Important Terms Pertaining to Coordination Compounds
What are Heteroleptic complexes?
Concept: Important Terms Pertaining to Coordination Compounds
How do you convert 2-bromobutane to but-2-ene?
Concept: Reactions of Haloalkanes - Elimination Reactions
What is the role of coke in the extraction of iron from its oxides?
Concept: Occurrence of Metals
Auto-oxidation of chloroform in air and sunlight produces a poisonous gas known as ______.
Concept: Polyhalogen Compounds
Draw the structures of the following molecules: BrF3
Concept: Group 17 Elements - The Halogen Family >> Interhalogen Compounds
Write the equations involved in the following reactions : Williamson synthesis
Concept: Preparation of Ethers
Arrange the following in the order of the property indicated against set :
H2O, H2S, H2Se, H2Te − increasing acidic character.
Concept: Group 16 Elements - The Oxygen Family
