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How would you account for the following?
Transition metals and their compounds act as catalysts.
Concept: General Properties of the Transition Elements (D-block)
Aniline does not give Friedel-Crafts reaction. Give a reason.
Concept: Amines > Chemical Reactions of Amines - Electrophilic Substitution
Why does a solution containing non-volatile solute have higher boiling point than the pure solvent ?
Concept: Vapour Pressure of Liquid > Vapour Pressure of Liquid- Liquid Solutions
Define the following term: Primitive unit cells
Concept: Crystal Lattices and Unit Cells
What is the difference between the order of a reaction and the molecularity of a reaction?
Concept: Order of a Reaction > Order-reaction (Meaning)
Give the reason for the following:
Gelatin is added to ice creams.
Concept: Order of a Reaction > Problems Based on First Order Rate Equation and Half Life Period
The rate constant of a first order reaction increases from 2 × 10−2 to 4 × 10−2 when the temperature changes from 300 K to 310 K. Calculate the energy of activation (Ea).
(log 2 = 0.301, log 3 = 0.4771, log 4 = 0.6021)
Concept: Temperature Dependence of the Rate of a Reaction
How much charge is required for the reduction of 1 mol of Zn2+ to Zn?
Concept: Nernst Equation - Introduction
What type of battery is mercury cell? Why is it more advantageous than dry cell?
Concept: Batteries > Primary Batteries
Name the type of cell which was used in Apollo space programme for providing electrical power.
Concept: Batteries > Primary Batteries
State Kohlrausch’s law of independent migration of ions.
Concept: Conductance of Electrolytic Solutions > Variation of Conductivity and Molar Conductivity with Concentration
State Kohlrausch law of independent migration of ions.
Concept: Conductance of Electrolytic Solutions > Variation of Conductivity and Molar Conductivity with Concentration
The molar conductance of a solution _______ with dilution, while its specific conductance _______ with dilution.
Concept: Electrochemistry > Electrolytic Conductance
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
Name the type of isomerism shown by the following pair of compounds:
[CoCl(H2O)(NH3)4]Cl2 and [CoCl2(NH3)4]Cl.H2O
Concept: Isomerism in Coordination Compounds > Stereoisomerism
On the basis of Crystal Field Theory, write the electronic configuration of d4 ion if Δ0 > P.
Concept: Bonding in Coordination Compounds > Crystal Field Theory (CFT)
Purification of aluminium by electrolytic refining is carried out by
(a)Hoope process
(b)Hall process
(c)Baeyer process
(d)Serperck process
Concept: Occurrence of Metals
Why is Mn2+ ion more stable than Fe2+ ion?
(Atomic numbers of Mn = 25 and Fe = 26)
Concept: F-block Elements > The Lanthanoids
Write the formula of the following compound:
Triammine triaquachromium (III) chloride
Concept: Polyhalogen Compounds
Identify the compound A,B and C:
\[\ce{C2H5OH->[PCl5]A->[KCN]B->[H3O+]C2H5COOH->[NH3][\Delta]C}\]
Concept: Preparation, Properties, and Uses of the Following: Ethyl Bromide, Chloroform, Iodoform, Haloform Reaction
