91.

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

Identify the wrong statement. 

• Salicylic acid is a monobasic acid

• Methyl salicylate is an ester

• Salicylic acid gives violet colour with neutral ferric chloride as well as brisk effervescence with sodium bicarbonate

• Methyl salicylate does not occur in mineral oils

The number of mesa forms in the following compound is

$\mathrm{HOOC}·\mathrm{CH}\left({\mathrm{CH}}_3\right)·\mathrm{CH}\left(\mathrm{OH}\right)·\mathrm{CHCl}·\mathrm{CH}\left(\mathrm{OH}\right)\mathrm{CH}\left({\mathrm{CH}}_3\right)·\mathrm{COOH}$

• 3

• 4

• 8

• 16

The compound 'C' in the following reaction is

${\mathrm{C}}_7{\mathrm{H}}_8\stackrel{3{\mathrm{Cl}}_2/∆}{\to } \mathrm{A} \stackrel{{\mathrm{Br}}_2/ \mathrm{Fe}}{\to } \mathrm{B} \stackrel{ \mathrm{Zn} / \mathrm{HCl}}{\to } \mathrm{C}$

• o-bromotoluene

• m-bromotoluene

• p-bromotoluene

• 3-bromo-2, 4, 6-trichlorotoluene

Benzaldehyde on refluxing with aqueous alcoholic KCN produce

• cyanobenzene

• cyanohydrin

• benzoyl cyanide

• benzoin

${\mathrm{CH}}_3-\mathrm{CH}\left({\mathrm{OC}}_2{\mathrm{H}}_5\right)-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$ the IUPAC name is 

• 2-ethoxy pentane

• 4-ethoxy pentane

• pentyl-ethyl ether

• 2-pentoxy ethane

The aldol condensation of CH₃ -CHO results is the formation of

• 

• 

• ${\mathrm{CH}}_3-{\mathrm{CH}}_2\mathrm{OH} + {\mathrm{CH}}_3\mathrm{OH}$

• 

Which does not react with Fehling's solution?

• CH₃CHO

• C₆H₅CHO

• C₆H₁₂O₆

• HCOOH