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For a chemical reaction R → P, the variation in the concentration (R) vs. time (t) plot is given as:
(i) Predict the order of the reaction.
(ii) What is the slope of the curve?
(iii) Write the unit of rate constant for this reaction.
Concept: Factors Influencing Rate of a Reaction
A first-order reaction is 50% complete in 30 minutes at 300 K and in 10 minutes at 320 K. Calculate activation energy (Ea) for the reaction. [R = 8.314 J K−1 mol−1]
[Given: log 2 = 0.3010, log 3 = 0.4771, log 4 = 0.6021]
Concept: Temperature Dependence of the Rate of a Reaction
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
