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Explain why the electrophilic substitution reactions in haloarenes occur slowly and require more drastic conditions as compared to those in benzene.
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Electrophilic Substitution Reactions
An organic compound A with the molecular formula (+) C4H9Br undergoes hydrolysis to form (+) C4H9OH. Give the structure of A and write the mechanism of the reaction.
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions
What happens when
(i) PCl5 is heated ? Write the reactions involved.
Concept: Group 17 Elements - The Halogen Family >> Chlorine
Explain the mechanism of the following reaction:
Concept: Preparation of Ethers
How will you convert: Propene to Propan-2-ol?
Concept: Methods of Preparation of Alcohols
Account for the following: Fluorine does not exhibit positive oxidation state.
Concept: Group 17 Elements - The Halogen Family
Account for the following: Oxygen shows catenation behavior less than sulphur.
Concept: Group 16 Elements - The Oxygen Family
Pb(NO3)2 on heating gives a brown gas which undergoes dimerisation on cooling? Identify the gas
Concept: Group 15 Elements - The Nitrogen Family >> Oxides of Nitrogen
Draw the structures of the following molecules: (HPO3)3
Concept: Group 15 Elements - The Nitrogen Family >> Compounds of Phosphorus
What happens when: SO2 gas is passed through an aqueous solution Fe+3 salt?
Concept: Group 16 Elements - The Oxygen Family >> Sulphur Dioxide
Write the final product(s) in each of the following reactions:
Concept: Chemical Reactions of Alcohols and Phenols >> Reactions Involving Cleavage of Carbon–Oxygen (C–O) Bond in Alcohols
Write the final product(s) in each of the following reactions:
Concept: Chemical Properties of Phenol
Give reasons: SO2 is reducing while TeO2 is an oxidising agent.
Concept: Group 16 Elements - The Oxygen Family
Out of white phosphorus and red phosphorus, which one is more reactive and why?
Concept: Group 15 Elements - The Nitrogen Family >> Phosphorus - Allotropic Forms
Name the reagents used in the following reactions:
Concept: Methods of Preparation of Alcohols
Write the main products when
2, 4, 6-trinitrochlorobenzene is subjected to hydrolysis
Concept: Chemical Properties of Phenol
Give reasons for the following:
o-nitrophenol is more acidic than o-methoxyphenol.
Concept: Chemical Reactions of Alcohols and Phenols >> Reactions Involving Cleavage of Carbon–Oxygen (C–O) Bond in Alcohols
Give reasons for the following: Butan-1-ol has a higher boiling point than diethyl ether.
Concept: Chemical Properties of Alcohols and Phenols
Account for the following: Interhalogens are more reactive than pure halogens.
Concept: Group 17 Elements - The Halogen Family >> Interhalogen Compounds
which poisonous gas is evolved when white phosphorus is heated with conc. NaOH solution? Write the chemical equation involved.
Concept: Group 15 Elements - The Nitrogen Family >> Phosphine
