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

In Gattermann reaction, a diazonium group is replaced by X using Y.X and Y are

• X	Y
  ${\mathrm{Cl}}^{⊝}$	Cu/HCl

• X	Y
  ${\mathrm{Cl}}^{\oplus }$	CuCl2/HCl

• X	Y
  ${\mathrm{Cl}}^{⊝}$	CuCl2/HCl

• X	Y
  Cl2	Cu2O/HCl

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

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

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

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

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

How many tripeptides can be prepared by linking the amino acids glycine, alanine and phenyl alanine?

• One

• Three

• Six

• Twelve

A codon has a sequence of A, and specifies a particular B that is to be incorporated into a C. What are A, B, C

• A	B	C
  3 bases	amino acid	carbohydrate

• A	B	C
  3 acids	carbohydrate	protein

• A	B	C
  3 base	protein	amino acid

• A	B	C
  3 bases	mino acid	protein

Parkinson's disease is linked to abnormalities in the levels of dopamine in the body. The structure of dopamine is

Consider the following reaction,

${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{HCl} + \mathrm{AgCN} \stackrel{\mathrm{EtOH}/{\mathrm{H}}_2\mathrm{O}}{\to } \mathrm{X} \left(\mathrm{major}\right)$

Which one of the following statements is true for X ?

(I) It gives propionic acid on hydrolysis
(II) It has an ester functional group
(III) It has a nitrogen linked to ethyl carbon
(IV) It has a cyanide group

• IV

• III

• II

• I

40.

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

• nucleophilic addition

• elimination

• electrophilic addition

• nucleophilic addition-elimination