Aldol is

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

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

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

• None of the above

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

• aldol

• phorone

• propionaldehyde

• 4-hydroxy-4-methyl-2-pentanone

73.

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 fatty acid which shows reducing property is

• acetic acid

• ethanoic acid

• oxalic acid

• formic acid

One mole of alkene X on ozonolysis gave one mole of acetaldehyde and one mole of acetone. The IUPAC name of X is

• 2-methyl-2-butene

• 2-methyl-1-butene

• 2-butene

• 1-butene

What are X and Y in the following reaction sequence?

${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH} \stackrel{{\mathrm{Cl}}_2}{\to }\mathrm{X}\stackrel{{\mathrm{Cl}}_2}{\to }\mathrm{Y}$

• C₂H₅Cl, CH₃CHO

• CH₃CHO, CH₃CO₂H

• CH₃CHO, CCl₃CHO

• C₂H₅Cl, CCl₃CHO

What are A, B, C in the following reactions?

$$\begin{gathered} \left(\mathrm{I}\right) ({\mathrm{CH}}_3{\mathrm{CO}}_2{)}_2\mathrm{Ca} \stackrel{∆}{\to }\mathrm{A} \\ (\mathrm{II}) {\mathrm{CH}}_3{\mathrm{CO}}_2\mathrm{H} \underset{\mathrm{Red} \mathrm{P}}{\overset{\mathrm{HI}}{\to }} \mathrm{B} \\ (\mathrm{III}) 2{\mathrm{CH}}_3{\mathrm{CO}}_2\mathrm{H} \stackrel{{\mathrm{P}}_4{\mathrm{O}}_{10}}{\to }\mathrm{C} \end{gathered}$$

• A	B	C
  C2H6	CH3COCH3	(CH3CO)2O

• A	B	C
  (CH3CO)2O	C2H6	CH3COCH3

• A	B	C
  CH3COCH3	C2H6	(CH3CO)2O

• A	B	C
  CH3COCH3	(CH3CO)2O	C2H6

One per cent composition of an organic compound A is, carbon : 85. 71 % and hydrogen 14.29%. Its vapour density is 14. Consider the following reaction sequence

$\mathrm{A} \stackrel{{\mathrm{Cl}}_2/{\mathrm{H}}_2\mathrm{O}}{\to }\mathrm{B} \underset{\left(\mathrm{ii}\right) {\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\left(\mathrm{i}\right) \mathrm{KCN}/ \mathrm{EtOH}}{\to }}\mathrm{C}$

Identify C

• ${\mathrm{CH}}_3-\mathrm{CH}\left(\mathrm{OH}\right)-{\mathrm{CO}}_2\mathrm{H}$

• $\mathrm{HO}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CO}}_2\mathrm{H}$

• $\mathrm{HO}-{\mathrm{CH}}_2-{\mathrm{CO}}_2\mathrm{H}$

• ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CO}}_2\mathrm{H}$

The synthesis of crotonaldehyde from acetaldehyde is an example of........... reaction.

• nucleophilic addition

• elimination

• electrophilic addition

• nucleophilic addition-elimination