Q.1. The structure of intermediate A in the following reaction, is (2019)
Q.2. In the reaction
the electrophile involved is (2018)
A: dichloromethyl cation
B: formyl cation
C: dichloromethyl anion
Q.3. The compound A on treatment with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A, B and C are in the order (2018)
A: C2H5OH, C2H6, C2H5Cl
B: C2H5OH, C2H5Cl, C2H5ONa
Q.4. Identify the major products P, Q and R in the following sequence of reaction: (2018)
Q.5. The heating of phenyl–methyl ethers with HI produces (2017)
D: ethyl chlorides
Q.6. The most suitable method of separation of 1 : 1mixture of ortho and para-nitrophenols is: (2017)
C: Steam distillation
The ortho and para isomers can be separated by steam distillation. o-Nitrophenol is steam volatile due to intramolecular hydrogen bonding while p-nitrophenol is less volatile due to intermolecular hydrogen bonding which cause association of molecule.
Q.7. The reaction:
can be classified as: (2016)
A: Williamson alcohol synthesis reaction
B: Williamson ether synthesis reaction
C: Alcohol formation reaction
D: Dehydration reaction
The reaction can be classified as Williamson ether synthesis reaction.
In this reaction, sodium alkoxide reacts with alkyl halide to form an ether.
In the given reaction, cyclopentanol reacts with sodium hydride to form sodium salt of cyclopentanolate. It then reacts with methyl iodide to form methoxycyclopentane.
Q.8. The reaction
A: Gatterman – Koch reaction
B: Williamson Synthesis
C: Williamson continuous etherification process
D: Etard reaction
The reaction is called Williamson synthesis
Q.9. Which of the following will not be soluble sodium hydrogen carbonate? (2014)
B: Benzenesulphonic acid
C: 2, 4, 6 − trinitrophenol
D: Benzoic acid
While 2,4,6-trinitrophenol, benzoic acid and benzene sulphonic acid are soluble in NaHCO3. This reaction is possible in the forward direction if acid is more acidic than H2CO3.o-nitrophenol is less acidic than H2CO3. Hence, it is not soluble in sodium hydrogen carbonate.
Q.10. Among the following sets of reactants which one produces anisole? (2014)
A: C6H5OH; neutral FeCl3
B: C6H5 −CH3; CH3COCl; AlCl3
D: C6H5OH; NaOH; CH3I