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What happens when (CH3)3 C – OH is heated with Cu/573 K?
Write the chemical equation in support of your answer.
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The following questions are case-based questions. Read the passage carefully and answer the questions that follow:
| The carbon-oxygen double bond is polarised in aldehydes and ketones due to higher electronegativity of oxygen relative to carbon. Therefore, they undergo nucleophilic addition reactions with a number of nucleophiles such as HCN, NaHSO3, alcohols, ammonia derivatives and Grignard reagents. Aldehydes are easily oxidised by mild oxidising agents as compared to ketones. The carbonyl group of carboxylic acid does not give reactions of aldehydes and ketones. Carboxylic acids are considerably more acidic than alcohols and most of simple phenols. |
Answer the following:
(a) Write the name of the product when an aldehyde reacts with excess alcohol in the presence of dry HCl. (1)
(b) Why carboxylic acid is a stronger acid than phenol? (1)
(c) (i) Arrange the following compounds in increasing order of their reactivity towards CH3MgBr: (1)
CH3CHO, \[\begin{array}{cc}
\ce{(CH3)3C-C-CH3}\\
\phantom{....}||\\
\phantom{....}\ce{O}
\end{array}\], \[\begin{array}{cc}
\ce{CH3-C-CH3}\\
||\\
\ce{O}
\end{array}\]
(ii) Write a chemical test to distinguish between propanal and propanone. (1)
OR
(c) Write the main product in the following: (2)
| (i) |  |
| (ii) |  |
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Aldehydes and ketones react with hydroxylamine to form ______.
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For the reaction \[\ce{3A -> 2B}\], rate of reaction `-("d"["A"])/"dt"` is equal to ______.
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Which of the following alcohols will not undergo oxidation?
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The complex [Co(NH3)5(NO2)]Cl2 is red in colour. Give IUPAC the name of its linkage isomer.
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Which of the following observation is shown by 2-phenyl ethanol with Lucas Reagent?
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Out of p-tolualdehyde and p-nitrobenzaldehyde, which one is more reactive towards nucleophilic addition reactions, why?
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Write the structure of the product formed when acetone reacts with 2, 4 DNP reagent.
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Draw structures of the given derivatives.
The ethylene ketal of hexan-3-one
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Draw structures of the given derivatives.
The ethylene ketal of hexan-3-one
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Write the mechanism of acid dehydration of ethanol to yield ethene.
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Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
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Draw the structure of the following derivative.
The ethylene ketal of hexane-3-one
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Write the mechanism of acid dehydration of ethanol to yield ethene.
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Indicate the types of isomerism exhibited by the following complexes and draw the structures for this isomer:
Pt(NH3)(H2O)Cl2
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Draw structure of the following derivative.
The ethylene ketal of hexane-3-one
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Write the mechanism of acid dehydration of ethanol to yield ethene.
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Write the mechanism of acid dehydration of ethanol to yield ethene.
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Draw structure of the following derivative.
Acetaldehydedimethylacetal
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