31.

Give the IUPAC name for

${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_2-\mathrm{CO}-{\mathrm{H}}_2\mathrm{C}-{\mathrm{CH}}_2-\mathrm{CO}-{\mathrm{OCH}}_3$

• ethyl-4-oxoheptanoate

• methyl-4-oxoheptanoate

• ethyl-4-oxohexanoate

• methyl-4-oxohexanoate

The catalyst used in Rosenmund reaction is :

• Zn/ Hg

• Pd / BaSO₄

• Raney Ni

• Na in ethanol

$({\mathrm{CH}}_2\mathrm{CO}{)}_2\mathrm{O} + \mathrm{RMgX} \stackrel{{\mathrm{H}}_2\mathrm{O}}{\to }?$

• ROOCH(CH₂)COOR

• RCOCH₂CH₂COCH

• RCOOR

• RCOOH

The weakest acid amongst the following is :

• ClCH₂COOH

• HCOOH

• FCH₂CH₂COOH

• CH₂(I)COOH

Urea on slow heating gives :

• NH₂CONHNO₂

• NH₂CONHCONH₂

• HCNO

• NH₂CONH₂.HNO₃

Trans esterification is the process of :

• conversion of an aliphatic acid to ester

• conversion of an aromatic acid to ester

• conversion of one ester to another ester

• conversion of an ester into its components namely acid and alcohol

The correct sequence of base strengths in aqueous solution is :

• (CH₃)₂NH > CH₃NH₂ > (CH₃)₃N

• (CH₃)₃N > CH₃NH₂ >(CH₃)₂NH

• (CH₃)₃N > CH₃NH₂ = (CH₃)₂NH

• (CH₃)₂NH > (CH₃)₃N > CH₃NH₂ 

When aqueous solution of benzene diazoniumchloride is boiled, the product formed is:

• C₆H₅CH₂OH

• C₆H₆ + N₂

• C₆H₅COOH

• C₆H₅OH

Carbylamine reaction is given by aliphatic :

• primary amine

• secondary amine

• tertiary amine

• quaternary ammonium salt

${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO} \stackrel{ {\mathrm{NH}}_3}{\to } ?$

• $({\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHN}{)}_2\mathrm{CH}·{\mathrm{C}}_6{\mathrm{H}}_5$

• C₆H₅NHCH₃

• C₆H₅NHCH₂

• C₆H₅NHC₆H₅