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What is the principle behind the zone refining of metals?
Concept: Refining of Crude Metals
Identify the chiral molecule in the following pair :
Concept: Haloalkanes >> R-s and D-l Configuration
Explain the principle of the method of electrolytic refining of metals. Give one example.
Concept: Refining of Crude Metals
Write the structures of A, B and C in the following:
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions
p-Dichlorobenzene has higher m.p. and lower solubility than those of o- and m-isomers. Discuss.
Concept: Physical Properties of Haloalkanes and Haloarenes
Give reasons:
The dipole moment of chlorobenzene is lower than that of cyclohexyl chloride.
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Nucleophilic Substitution
Account for the following:
Helium is used in diving apparatus.
Concept: Group 18 Elements - The Noble gas Family
Draw the structures of the following molecules: XeF2
Concept: Group 18 Elements - The Noble gas Family
Draw the structures of the following: H4P2O7 (Pyrophosphoric acid)
Concept: Group 15 Elements - The Nitrogen Family >> Oxoacids of Phosphorus
What happens when
H3PO3 is heated ?
Write the reactions involved.
Concept: Group 15 Elements - The Nitrogen Family >> Phosphine
Write the mechanism of the following reaction:
Concept: Chemical Reactions of Alcohols and Phenols >> Reactions Involving Cleavage of Carbon–Oxygen (C–O) Bond in Alcohols
Write the main product(s) in each of the following reactions:
Concept: Chemical Reaction of Ethers - Cleavege of C-O Bonds
Write the main product(s) in each of the following reactions:
Concept: Methods of Preparation of Alcohols
Write the main product(s) in each of the following reactions:
Concept: Chemical Properties of Phenol
Account for the following :
Ozone is thermodynamically unstable.
Concept: Group 16 Elements - The Oxygen Family >> Ozone
Account for the following : Solid PCl5 is ionic in nature.
Concept: Group 15 Elements - The Nitrogen Family >> Phosphorus Halides
Account for the following:
Fluorine forms only one oxoacid HOF.
Concept: Group 17 Elements - The Halogen Family >> Oxoacids of Halogens
Draw the structure of BrF5
Concept: Group 17 Elements - The Halogen Family >> Interhalogen Compounds
Compare the oxidizing action of F2 and Cl2 by considering parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy.
Concept: Group 17 Elements - The Halogen Family
Write the conditions to maximize the yield of H2SO4 by contact process.
Concept: Group 16 Elements - The Oxygen Family >> Sulphuric Acid
