The compound $X$ is formed by the decarboxylation of acetoacetic acid $(CH_3COCH_2COOH)$ upon heating. $X$ can also be formed by:

  • A
    $CH_3-CH_2-CH_2-Cl \xrightarrow{LiAlH_4}$
  • B
    $CH_3-CH_2-COOH \xrightarrow{P + HI}$
  • C
    $CH_3-C \equiv CH \xrightarrow[H_2O]{Hg^{+2}}$
  • D
    All

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Identify the compound $C$ in the following sequence:
$(CH_3)_2CHCH_2C \equiv N$ $\xrightarrow{HCl, H_2O} \text{compound } A$ $\xrightarrow[2. H_2O]{1. LiAlH_4} \text{compound } B$ $\xrightarrow{PCC, CH_2Cl_2} \text{compound } C$

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Which of the following gives an aldehyde on dry distillation?

Match the reactants in column $-I$ with the reaction conditions in column $-II$ to find the corresponding products in column $-III$.
Column $-I$ (Reactant) Column $-II$ (Reaction Condition) Column $-III$ (Product)
$A$. $CH_3CN + C_6H_5MgBr$ $i$. $Ether, H_3O^+$ $p$. Benzaldehyde
$B$. $Benzene + CH_3COCl$ $ii$. $Hg^{2+}, H_2SO_4, H_2O$ $q$. Acetophenone
$C$. $Toluene$ $iii$. $Anhydrous AlCl_3$ $r$. Propiophenone
$D$. $Phenyl ethyne$ $iv$. $x. Cl_2, hv$; $y. H_2O, 373 \ K$ $s$. Acetaldehyde

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Which sequence represents the best synthesis of hexanal?
$CH_3CH_2CH_2CH_2CH_2CH=O$ (Hexanal)

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The most suitable reagent for the conversion of $RCH_2OH \to RCHO$ is

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