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Draw the structure of the following molecule:
XeF4
Concept: Group 18 Elements - The Noble gas Family
Write the equation involved in the following reaction:
Reimer-Tiemann reaction
Concept: Chemical Properties of Phenol
How do you convert toluene to benzoic acid?
Concept: Acids >> Nomenclature of Carboxylic Acids
Define terms: Fuel cell
Concept: Batteries >> Primary Batteries
Propanal and Propanone
Concept: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> Chemical Reactions of Aldehydes and Ketones - Oxidation
Write the chemical equation involved in the following reaction:
Hoffmann-bromamide degradation reaction
Concept: Preparation of Amines
Illustrate the following reaction giving suitable example in each case:Gabriel phthalimide synthesis
Concept: Preparation of Amines
Amino acids show amphoteric behaviour. Why?
Concept: Biomolecules in the Cell > Proteins >> Amino Acids
Write the cell reaction and calculate the e.m.f of the following cell at 298 K:
Sn(s) | Sn2+ (0.004 M) || H+ (0.020 M) | H2(g) (1 bar) | Pt(s)
(Given: `E_(Sn^(2+)"/"Sn)^° = -0.14` V)
Concept: Galvanic Cells - Measurement of Electrode Potential
Give reasons:
On the basis of E° values, O2 gas should be liberated at anode but it is Cl2 gas which is liberated in the electrolysis of aqueous NaCl.
Concept: Conductance of Electrolytic Solutions >> Measurement of the Conductivity of Ionic Solutions
Give reasons:
Conductivity of CH3COOH decreases on dilution.
Concept: Conductance of Electrolytic Solutions >> Measurement of the Conductivity of Ionic Solutions
What is Lanthanoid contraction?
Concept: F-block Elements >> The Lanthanoids
Define the following term:
Essential amino acids
Concept: Biomolecules in the Cell > Proteins >> Amino Acids
A first-order reaction is 50% completed in 40 minutes at 300 K and in 20 minutes at 320 K. Calculate the activation energy of the reaction. (Given : log 2 = 0·3010, log 4 = 0·6021, R = 8·314 JK–1 mol–1)
Concept: Temperature Dependence of the Rate of a Reaction
Draw the structures of the HClO3.
Concept: Group 17 Elements - The Halogen Family >> Oxoacids of Halogens
Write the chemical equations to illustrate the following name reaction:
Cannizzaro’s reaction
Concept: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> Chemical Reactions of Aldehydes and Ketones - Other Reactions
Give reasons for the following:
Aniline does not undergo Friedel- Crafts reaction.
Concept: Concept of Amines >> Chemical Reactions of Amines - Electrophilic Substitution
Calculate the freezing point of a solution containing 60 g of glucose (Molar mass = 180 g mol–1) in 250 g of water. (Kf of water = 1.86 K kg mol–1)
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
Give reasons for the following:
Measurement of osmotic pressure method is preferred for the determination of molar masses of macromolecules such as proteins and polymers.
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
Give reasons for the following :
Aquatic animals are more comfortable in the cold water than in warm water.
Concept: Solubility >> Solubility of a Gas in a Liquid
