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What is shape selective catalysis?
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Copper can be extracted by hydrometallurgy but not zinc. Explain.
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What is the role of cryolite in the metallurgy of aluminium?
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What is the role of graphite rod in the electrometallurgy of aluminium?
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How does the presence of double bonds in rubber molecules influence their structure and reactivity?
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Discuss the main purpose of vulcanisation of rubber.
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Identify the monomer in the following polymeric structures.
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An organic compound with the molecular formula C9H10O forms 2, 4-DNP derivative, reduces Tollens’ reagent and undergoes Cannizzaro reaction. On vigorous oxidation, it gives 1, 2-benzenedicarboxylic acid. Identify the compound.
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Describe the following:
Cannizzaro reaction
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Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.
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Show how will you synthesize pentan-1-ol using a suitable alkyl halide.
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Give the equation of the following reaction:
Oxidation of propan-1-ol with alkaline KMnO4 solution.
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Give the equation of the following reaction:
Dilute HNO3 with phenol.
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Give the equation of the following reaction:
Treating phenol with chloroform in the presence of aqueous NaOH.
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Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
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Name the reagent used in the following reaction:
Oxidation of a primary alcohol to carboxylic acid.
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Name the reagent used in the following reaction:
Oxidation of a primary alcohol to aldehyde.
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Name the reagent used in the following reaction:
Benzyl alcohol to benzoic acid.
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When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place:
\[\begin{array}{cc}
\phantom{...................................}\ce{Br}\\
\phantom{..................................}|\\
\ce{CH3 - CH - CH - CH3 ->[HBr] CH3 - C - CH2 - CH3}\\
|\phantom{.........}|\phantom{...................................}|\phantom{...........}\\
\ce{CH3}\phantom{...}\ce{OH}\phantom{...............................}\ce{CH3}\phantom{.......}\\
\end{array}\]
Give a mechanism for this reaction.
(Hint: The secondary carbocation formed in step II rearranges to a more
stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.)
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Identify A, B, C, D, E, R and R1 in the following:
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