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Cl2 acts as a bleaching agent.
Concept: Concept of Group 17 Elements
Write one difference between transition elements and p-block elements with reference to variability of oxidation states.
Concept: P - Block Group 16 Elements >> Oxoacids of Sulphur
Give a reason for the following:
E° value for (Mn2+|Mn) is negative whereas for (Cu2+|Cu) is positive.
Concept: Concept of Group 15 Elements
Write a chemical reaction to show that the open structure of D-glucose contains the following :
Five alcohol groups
Concept: Physical and Chemical Properties of Alcohols and Phenols
Why phenol undergoes electrophilic substitution more easily than benzene?
Concept: Chemical Reaction of Ethers - Electrophilic Substitution
Give a reason for the following :
Ozone is thermodynamically less stable than oxygen.
Concept: P - Block Group 16 Elements >> Ozone
Write the structure of main compounds A and B in the following reaction:
\[\ce{CH3CH2CN->[CH3MgBRH/3O+]A->[LiAIH4]B}\]
Concept: Methods of Preparation of Alcohols
Give reasons for the following:
E⁰ value for (Mn3+|Mn2+) is highly positive than that for (Cr3+|Cr2+) couple.
Concept: Concept of Group 15 Elements
Why phenol undergoes electrophilic substitution more easily than benzene?
Concept: Methods of Preparation of Phenols
Account for the following:
o-nitrophenol is more steam volatile than p-nitrophenol.
Concept: Chemical Reactions of Alcohols and Phenols >> Reactions Involving Cleavage of O-H Bond
Write the reaction involved in the following:
Friedal-Crafts Alkylation of Phenol
Concept: Chemical Properties of Phenol
Give simple chemical test to distinguish between Ethanol and Phenol.
Concept: Preparation of Commercially Important Alcohols
Give reasons for the following:
Sulphur in vapour state shows paramagnetic behaviour.
Concept: P - Block Group 16 Elements >> Sulphur - Allotropic Forms
Give reasons for the following:
Ozone is thermodynamically less stable than oxygen.
Concept: P - Block Group 16 Elements >> Ozone
Write the name of gas released when Cu is added to
dilute HNO3
Concept: p-Block elements of Group 15 Elements >> Nitric Acid
Write the name of gas released when Cu is added to
conc. HNO3
Concept: p-Block elements of Group 15 Elements >> Nitric Acid
Arrange the following in the increasing order of their property indicated:
Benzoic acid, Phenol, Picric acid, Salicylic acid (pka values).
Concept: Classification of Alcohols and Phenols
Arrange the following in the increasing order of their property indicated:
ethanol, ethanoic acid, benzoic acid (boiling point)
Concept: Physical and Chemical Properties of Alcohols and Phenols
Convert the following:
Phenol to N-phenylethanamide.
Concept: Chemical Properties of Phenol
Convert the following:
Propanenitrile to ethanol.
Concept: Preparation of Commercially Important Alcohols
