Aldehydes, Ketones and Carboxylic Acids

Which of the acids cannot be prepared by Grignard reagent?

• Acetic acid

• Succinic acid

• Formic acid

• All of these

Which of the following aldehydes give red precipitate with Fehling solution?

• Benzaldehyde

• Salicylaldehyde

• Acetaldehyde

• None of the above

When acetaldehyde is reacted with LiAlH₄, what is the product formed?

• CH₃COOH

• CH₃CH₂OH

• CH₃OH

• HCOOH

Acetic acid is reacted with metallic sodium to form hydrogen and X. When X is heated with sodalime, Y and sodium carbonate are formed. Y is .

• C₂H₆

• CH₄

• CH₃COONa

• CH₃CONH₂

$\mathrm{A} \stackrel{\mathrm{HCl}}{\to } ({\mathrm{CH}}_3{)}_2\mathrm{C}={\mathrm{CHCOCH}}_3, \mathrm{A} \mathrm{is}$

• acetone

• propionaldehyde

• formaldehyde

• acetaldehyde

An organic compound X gives a red precipitate on heating with Fehling's solution . Which one of the following reactions yields X as a major product?

• $\mathrm{HCHO} \underset{\left(\mathrm{ii}\right) {\mathrm{H}}_2\mathrm{O}}{\overset{\left(\mathrm{i}\right)\hspace{0.17em}{\mathrm{CH}}_3\mathrm{MgI}}{\to }}$

• ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Br} + \mathrm{AgOH} \stackrel{∆}{\to }$

• $2{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Br} + {\mathrm{Ag}}_2\mathrm{O} \stackrel{∆}{\to }$

• ${\mathrm{C}}_2{\mathrm{H}}_2 + {\mathrm{H}}_2\mathrm{O} \underset{1\% {\mathrm{HgSO}}_4 {60}^{°}\mathrm{C}}{\overset{40\% {\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}$

In the reaction, C₂H₅OC₂H₅ + CO   X.  What is X?

• Diethyl carbonate

• Ethyl carbonate

• Diethyl peroxide

• Ethyl propionate

 In the reaction sequence,

${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Cl} + \mathrm{KCN} \stackrel{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\to } \mathrm{X} \underset{∆}{\overset{{\mathrm{H}}_3\mathrm{O}°}{\to }}$

What is the molecular formula of Y?

• C₃H₆O₂

• C₃H₅N

• C₂H₄O₂

• C₂H₆O

What is the catalyst used in the conversion of acetaldehyde to acetic acid ?

• Manganese acetate

• LiAlH₄

• H₂/ N_I

• Na/ NH₃

What is X in the following reaction?

2CH₃COCH₃ $\stackrel{\mathrm{Ba}(\mathrm{OH}{)}_2}{\to }$ X

• H₃C-$\underset{{\mathrm{CH}}_3}{\overset{\mathrm{OH}}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}$-CH₂-$\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}$-CH₃

• H₃C-$\underset{{\mathrm{CH}}_3}{\overset{\mathrm{OH}}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}$-CH₂-CH₂-CHO

• CH₃CH(CH₃)CH₂COCH₃

• H₃C-$\underset{{\mathrm{CH}}_3}{\underset{|}{\mathrm{CH}}}-\underset{\mathrm{OH}}{\underset{|}{\mathrm{CH}}}-\underset{\mathrm{O}}{\underset{\left|\right|}{\mathrm{C}}}$-CH₃