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Give reasons for the following observations: Lyophilic sol is more stable than lyophobic sol.
Concept: Purification of Colloidal Solution
Give reasons for the following observations: Lyophilic sol is more stable than lyophobic sol.
Concept: Purification of Colloidal Solution
It is necessary to remove CO when ammonia is prepared by Haber's process.
Concept: Catalysis >> Enzyme Catalysis
What are the different types of emulsions? Give one example of each type.
Concept: Emulsions
Write the IUPAC name of the complex [Cr(NH3)4 Cl2]Cl.
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds
What type of isomerism is exhibited by the complex [Co(en)3]3+?
(en = ethane-1,2-diamine)
Concept: Isomerism in Coordination Compounds >> Stereoisomerism
Define the following term:
Anomers
Concept: Isomerism in Coordination Compounds >> Stereoisomerism
Write the IUPAC name of the following coordination compound:
K3[Fe(CN)6]
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds
Name the method used for the refining of Nickel metal.
Concept: Refining of Crude Metals
Which would undergo SN1 reaction faster in the following pair and why?
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions
Give reasons for the following:
(CH3)3C–O–CH3 on reaction with HI gives (CH3)3C–I and CH3–OH as the main products and not (CH3)3C–OH and CH3–I.
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions
Out of 
, which is more reactive towards SN1 reaction and why?
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions
In the extraction of Al, impure Al2O3 is dissolved in conc. NaOH to form sodium aluminate and leaving impurities behind. What is the name of this process?
Concept: Occurrence of Metals
Which would undergo SN2 reaction faster in the following pair and why ?
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions
Indicate the principle behind the method used for the refining of zinc.
Concept: Occurrence of Metals
Which form of the iron is the purest form of commercial iron?
Concept: Occurrence of Metals
Give reasons : n-Butyl bromide has higher boiling point than t-butyl bromide.
Concept: Physical Properties of Haloalkanes and Haloarenes
Give reasons : Racemic mixture is optically inactive.
Concept: Haloalkanes >> R-s and D-l Configuration
The presence of nitro group (−NO2) at o/p positions increases the reactivity of haloarenes towards nucleophilic substitution reactions.
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Nucleophilic Substitution
