Multiple Choice QuestionsWhich one of the following reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
Ethyl acetate
Butan -2-one
Acetamide
Acetamide
B.
Butan -2-one
Reaction of one molecule of HBr with one molecule of 1,3-butadiene at 400 C gives predominantly
3-bromobutene under kinetically controlled conditions
1-bromo-2-butene under thermodymically controlled conditions
3-bromobutene under thermodynamically controlled conditions
3-bromobutene under thermodynamically controlled conditions
B.
1-bromo-2-butene under thermodymically controlled conditions
The reaction
is fastest when X is
Cl
NH2
OC2H5
OC2H5
A.
Cl
Conjugated acid of Cl- is a stronger acid i.e. HCl.
Fluorobenzene (C6H5F) can be synthesized in the laboratory
by heating phenol with HF and KF
from aniline by diazotisation followed by heating the diazonium salt with HBF4
by direct fluorination of benzene with F2 gas
by direct fluorination of benzene with F2 gas
B.
from aniline by diazotisation followed by heating the diazonium salt with HBF4
On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is
CH3COOC2H5 + NaCl
CH3Cl + C2H5COONa
CH3COCl + C2H5OH + NaOH
CH3COCl + C2H5OH + NaOH
A.
CH3COOC2H5 + NaCl
Aqueous NaCl is neutral hence there is no reaction between ethyl acetate and aqueous NaCl
Which of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?
Phenol
Benzoic acid
Butanal
Butanal
D.
Butanal
A + NaOH → alcohol + acid
Thus, it is Cannizzaro reaction
A is thus aldehyde without H at alpha - carbon
(as C6H5CHO.HCHO)
2C6H5CHO + NaOH → C6H5CH2OH + C6H5COONa
The IUPAC name of the compound
3, 3- dimethyl -1- hydroxy cyclohexane
1,1 – dimethyl -3- cyclohexanol
3,3- dimethyl -1- cyclohexanol
3,3- dimethyl -1- cyclohexanol
C.
3,3- dimethyl -1- cyclohexanol
Acid catalyzed hydration of alkenes except ethene leads to the formation of
primary alcohol
secondary or tertiary alcohol
mixture of primary and secondary alcohols
mixture of primary and secondary alcohols
D.
mixture of primary and secondary alcohols
Acetyl bromide reacts with excess of CH3MgI followed by treatment with a saturated solution of NH4Cl given
acetone
acetyl iodide
2- methyl -2- propanol
2- methyl -2- propanol
C.
2- methyl -2- propanol
Among the following compound which can be dehydrated very easily is
C.
Dehydration of alcohol is in order 1° < 2° < 3°.
