Aldol is

• $\mathrm{\beta }-\mathrm{hydroxybutyraldehyde}$

• $\mathrm{\alpha }-\mathrm{hydroxybutanal}$

• $\mathrm{\beta }-\mathrm{hydroxypropanal}$

• None of the above

Nitrobenzene can be converted into azobenzene by reduction with

• $\mathrm{Zn}, {\mathrm{NH}}_4\mathrm{Cl}, ∆$

• Zn/NaOH, CH₃OH

• Zn/NaOH

• LiAlH₄, ether

The one which is least basic is

• NH₃

• C₆H₅NH₂

• (C₆H₅)₃N

• (C₆H₅)₂NH

On treatment of propanone with dilute Ba(OH)₂  the product formed

• aldol

• phorone

• propionaldehyde

• 4-hydroxy-4-methyl-2-pentanone

Which of the following converts CH₃CONH₂ to CH₃NH₂?

• NaBr

• NaOBr

• Br₂

• None of the above

Which metal aprons are worn by radiographer to protect him from radiation?

• Mercury coated apron

• Lead apron

• Copper apron

• Aluminimised apron

Formation of cyanohydrin from a ketone is an example of

• electrophilic addition

• nucleophilic addition

• nucleophilic substitution

• electrophilic substitution

Glycerol on treatment with oxalic acid at 110°C forms

• formic acid

• allyl alcohol

• CO₂ and CO

• acrolein

The reaction, ROH + H₂CN₂ in the presence of HBF₄, gives the following product

• ROCH₃

• RCH₂OH

• ROHCN₂N₂

• RCH₂CH₃

40.

The fatty acid which shows reducing property is

• acetic acid

• ethanoic acid

• oxalic acid

• formic acid