51.

The reaction ,

2CH₃-CO-OC₂H₅ $\stackrel{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{ONa}}{\to }$ CH₃-CO-CH₂-CO-OC₂H₅ + C₂H₅OH is called :

• Etard reaction

• Perkin's reaction

• Claisen condensation

• Claisen Schmidt reaction

Formaldehyde reacts with ammonia to give urotropine .The formula of urotropine is :

• (CH₂)₆N₄

• (CH₂)₄N₃

• (CH₂)₆N₆

• (CH₂)₃N₃

Phenol reacts with aqueous bromine to give :

• 

• 

•  + 

• 

The specific rotation of equilibrium mixture of $\mathrm{\alpha }$ - D-glucose and $\mathrm{\beta }$ - D-glucose, is :

• + 19°

• + 112°

• + 52°

• + 100°

The structural formula of an amino acid, isoleucine is :

• CH₃-$\stackrel{\underset{|}{{\mathrm{NH}}_2}}{\mathrm{CH}}$-COOH

• (CH₃)₂-CH-$\stackrel{\underset{|}{{\mathrm{NH}}_2}}{\mathrm{CH}}$-COOH

• $\stackrel{{\mathrm{CH}}_3}{\underset{{\mathrm{C}}_2{\mathrm{H}}_5}{\underset{|}{\stackrel{|}{\mathrm{CH}}}}}$-$\stackrel{\underset{|}{{\mathrm{NH}}_2}}{\mathrm{CH}}$-COOH

• (C₂H₅)₂-CH-$\stackrel{\underset{|}{{\mathrm{NH}}_2}}{\mathrm{CH}}$-COOH

Which of the following reaction is catalysed by enzyme maltase ?

• starch $\to$ maltose

• maltose $\to$ glucose

• lactose $\to$ maltose

• maltose $\to$ glucose + fructose

The components of Zeigler Natta catalyst, used in the polymerisation of propylene, are:

• TiCl₃ + Al(C₂H₅)₃

• TiCl₄ + Al(C₂H₅)₃

• Ti(C₂H₅)₃ + AlCl₃

• Ti(C₂H₅)₄ + AlCl₃

The cyanohydrin of which compound, gives lactic acid on hydrolysis ?

• HCHO

• CH₃CHO

• C₆H₅CHO

• CH₃COCH₃

Hinsberg's reagent is :

CH₃-CH₂-Cl $\stackrel{\mathrm{alc}. \mathrm{KOH}}{\to }$ A, the product is :

• CH₃CH₂OK

• CH₃CHO

• CH₃CH₂OCH₂CH₃

• CH₂=CH₂