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Answer the following question.
When MnO2 is fused with KOH in the presence of KNO3 as an oxidizing agent, it gives a dark green compound (A). Compound (A) disproportionates in an acidic solution to give a purple compound (B). An alkaline solution of compound (B) oxidizes KI to compound (C) whereas an acidified solution of compound (B) oxidizes KI to (D). Identify (A), (B), (C), and (D).
Concept: Some Important Compounds of Transition Elements - Oxides and Oxoanions of Metals
Using IUPAC norms, write the formula of potassium trioxalatochromate(III).
Concept: Some Important Compounds of Transition Elements - Oxides and Oxoanions of Metals
Give reasons for the following statement:
Transition metals and most of their compounds show paramagnetic behaviour.
Concept: General Properties of the Transition Elements (D-block)
Give reason for the following statement:
Physical and chemical properties of the 4d and 5d series of the transition elements are quite similar to expected.
Concept: General Properties of the Transition Elements (D-block)
Define transition metals.
Concept: Electronic Configurations of the D-block Elements
How is the variability in oxidation states of transition metals different from that of p-block elements?
Concept: General Properties of the Transition Elements (D-block)
Assertion (A) : Copper is a non-transition element.
Reason (R) : Copper has completely filled d-orbitals in its ground state.
Concept: Electronic Configurations of the D-block Elements
Which of the following characteristics of transition metals is associated with their catalytic activity?
Concept: General Properties of the Transition Elements (D-block)
When a coordination compound CoCl3.6NH3 is mixed with AgNO3, 3 moles of AgCl are precipitated per mole of the compound. Write the structural formula of the coordination compound.
Concept: Isomerism in Coordination Compounds >> Stereoisomerism
Draw the geometrical isomers of complex \[\ce{[Co(en)2Cl2]+}\].
Concept: Isomerism in Coordination Compounds >> Stereoisomerism
Write the dispersed phase and dispersion medium of butter.
Concept: Catalysis >> Enzyme Catalysis
Write down the IUPAC name of the complex [Pt(en)2Cl2]2+. What type of isomerism is shown by this complex?
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds
Using IUPAC norms write the formulate for the following coordination compound:
Hexaamminecobalt(III) chloride
Concept: Nomenclature of Coordination Compounds - Formulas of Mononuclear Coordination Entities
Using IUPAC norms write the formulate for the following coordination compound:
Potassium tetrachloridonickelate (II)
Concept: Nomenclature of Coordination Compounds - Formulas of Mononuclear Coordination Entities
Write the hybridization and shape of the following complexe : [CoF6]3–
(Atomic number : Co = 27, Ni = 28)
Concept: Bonding in Coordination Compounds >> Magnetic Properties of Coordination Compounds
Write the hybridization and shape of the following complexe : [Ni(CN)4]2–
(Atomic number : Co = 27, Ni = 28)
Concept: Bonding in Coordination Compounds >> Magnetic Properties of Coordination Compounds
Out of NH3 and CO, which ligand forms a more stable complex with a transition metal and why?
Concept: Stability of Coordination Compounds
Define the following term : Brownian movement
Concept: Properties of Colloidal Solutions
Define the following term:
Multimolecular colloids
Concept: Classification of Colloids >> Classification Based on Nature of Interaction Between Dispersed Phase and Dispersion Medium
What are the dispersed phase and dispersion medium in milk?
Concept: Emulsions
