Aldehydes, Ketones and Carboxylic Acids

Which of the following is Reimer-Tiemann reaction?

Some pairs ofions are given below. In which pair, first ion is more stable tlian second ion?

• H₃C-CH₂-C+H-CH₃ and H₃C-CH₂-CH-CH₂

• 

• H₃C-CH-CH₃ and H₃C-N-CH₃

• H₃C-CH-CH₃ and CH-OCH₃

Which intermediate is formed in the Reimer-Tiemann reaction?

• Aldehyde

• Carbocation

• Carbanion

• Substituted benzal chloride

Which one of the following is an acetal?

${\mathrm{H}}_3{\mathrm{CCH}}_2{\mathrm{CO}}_2\mathrm{H} \underset{∆}{\overset{{\mathrm{P}}_2{\mathrm{O}}_5}{\to }} \mathrm{X} \stackrel{{\mathrm{H}}_2\mathrm{O}}{\to } \mathrm{Y}\stackrel{{\mathrm{SOCl}}_2}{\to } \mathrm{Z}$. Identify X, Y, and Z.

• X	Y	Z
  H2C=CHCO2H	HOH2CCHOHCO2H	HOH2CCHOHCOCL

• X	Y	Z
  (H3CCH2CO)2O	H3CCH2CO2H	H3CCH2COCl

• X	Y	Z
  (H3CCO)2O	H3CCOC2H	ClCH2COCl

• X	Y	Z
  (H3CCH2CO)2O	H3CCO2H	H3CCOCl

Consider the following reactions,

X + Y $\stackrel{{\mathrm{H}}^{+}}{\to }$ Aspirin + H₃CCOOH. Identify X and Y from the following

$\mathrm{R}-\mathrm{CN} \underset{\left(\mathrm{ii}\right) {\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\left(\mathrm{i}\right) {\mathrm{SnCl}}_2+ \mathrm{HCl}}{\to }} \mathrm{R}-\mathrm{CHO}$. What is the name of the above reaction?

• Rosenmund

• Williamson

• Stephen

• Kolbe

What is the name of the following reaction?

HCHO + HCHO $\underset{∆}{\overset{\mathrm{NaOH}}{\to }}$ CH₃OH + HCOONa

• Clemmensen reaction

• Cannizzaro reaction

• None of the options

• Hell-Volhard reaction

Conversion of esters to aldehydes can be accomplished by

• Stephen reduction

• Rosenmund reduction

• Reduction with lithium aluminium hydnde

• Reduction with diisobutyl aluminium hydride