721.

Which of the following will not respond to iodoform test?

• Ethyl alcohol

• Propanol-2

• Propanol-1

• Ethanal

Which of the following acids will have lowest value of pK_a?

• CH₃CH₂COOH

• CH₃CHBrCOOH

• CH₃CHFCOOH

• FCH₂CH₂COOH

What will be the compound if two valencies of carbonyl group are satisfied by two alkyl groups?

• Aldehyde

• Ketone

• Acid

• Acidic anhydride

Which of the following compounds is oxidised to prepare methyl ethyl ketone?

• 2-propanol

• 1-butanol

• 2-butanol

• t-nutyl alcohol

Which pair of the following carbonyl compounds can be diifferentiated by I₂/NaOH?

• C₆H₅-CHO and C₆H₅-CO-CH₂-CH₃

• C₆H₅-CO-CH₃ and CH₃-CH₂-CO-CH₃

• CH₃-CH₂-CO-CH₂-CH₃ and C₆H₅COCH₂CH₃

• C₆H₅-CO-CH(CH₃)-CH₃ and C₆H₅-CO-CH₃

In the reaction sequence,

CH₃CN $\underset{{\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{{\mathrm{CH}}_3\mathrm{MgBr}}{\to }}\left[\mathrm{A}\right] \stackrel{\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to } \left[\mathrm{B}\right]$. The products [A] and [B] are

•  

• (CH₃)₃COH, (CH₃)₂C=CH₂

• (CH₃)₂CHOH, CH₃CH=CH₂

• CH₃COCH₃, CH₃CH=CH₂

In the reaction,

CH₃CHO $\stackrel{\left[\mathrm{O}\right]}{\to } \mathrm{A} \stackrel{\mathrm{P}, {\mathrm{Cl}}_2}{\to } \mathrm{B} \stackrel{\mathrm{KCN}}{\to } \mathrm{C} \stackrel{{\mathrm{H}}^{+}, {\mathrm{H}}_2\mathrm{O}}{\to }$ D

The end product D is

• crotonic acid

• lactic acid

• malonic acid

• tartaric acid

C₂H₂ $\underset{{\mathrm{H}}_2{\mathrm{SO}}_4, {\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{Hg}}^{2+}}{\to }} \mathrm{A} \stackrel{\left[\mathrm{O}\right]}{\to } \mathrm{B}$

The compound B is

• an acid

• an aldehyde

• ketone

• ethanol

Which of the following does not give silver mirror test?

• HCOOH

• CH₃CH₂CHO

• CH₃CHO

• CH₃COCH₃

Which one of the following undergoes aldol condensation?

• Acetaldehyde

• Propanaldehyde

• Acetone

• All of these