31.
In the reaction shown below the six membered ring is generated by shifting which bond
A
$$A$$
B
$$B$$
C
$$C$$
D
$$D$$
Answer :
$$A$$
32. The functional group, which is found in amino acid is
A
$$ - COOH$$ group
B
$$ - N{H_2}$$ group
C
$$ - C{H_3}$$ group
D
both (A) and (B)
Answer :
both (A) and (B)
33. The most important chemical method to resolve a racemic mixture makes use of the formation of
A
a $$meso$$ - compound
B
enantiomers
C
diastereomers
D
racemates
Answer :
diastereomers
34.
Among the following four structures I to IV,
it is true that
A
only I and II are chiral compounds
B
only III is a chiral compound
C
only II and IV are chiral compounds
D
all four are chiral compounds
Answer :
only I and II are chiral compounds
35. Inductive effect of which atom is taken as zero to compare inductive effect of other atoms?
A
Hydrogen
B
Chlorine
C
Carbon
D
Oxygen
Answer :
Hydrogen
36.
The $$IUPAC$$ name of the compound
A
$$3 - keto - 2 - methylhex - 4 - enal$$
B
$$5 - formylhex - 2 - en - 3 - one$$
C
$$5 - methyl - 4 - oxohex - 2 - en - 5 - al$$
D
$$3 - keto - 2 - methylhex - 5 - enal$$
Answer :
$$3 - keto - 2 - methylhex - 4 - enal$$
group in numbering of principal carbon chain.37. Most stable carbonium ion is :
A
$$p - N{O_2} - {C_6}{H_4} - CH_2^ + $$
B
$${C_6}{H_5}CH_2^ + $$
C
$$p - Cl - {C_6}{H_4} - CH_2^ + $$
D
$$p - C{H_3}O - {C_6}{H_{14}} - CH_2^ + $$
Answer :
$$p - C{H_3}O - {C_6}{H_{14}} - CH_2^ + $$
38. Which one is most reactive towards nucleophilic addition reaction?
A
B
C
D
Answer :
39. Vital Force Theory was proposed by
A
Kolbe
B
F. Wohler
C
Berzelius
D
Berthelot
Answer :
Berzelius
40. Which of the following optically active compounds racemizes in $$dil.\frac{{KOH}}{{C{H_3}OH}}$$ solution?
A
B
C
D
Answer :
group adjacent to asymmetric carbon atom carrying a hydrogen easily racemise.