Alcohols, Phenols and Ethers Quiz-3
Dear Readers,
JEE Advanced is a high level exam that checks your concept by putting various types of questions. The questions are in a different format from JEE mains.m, herein the questions are : single correct multiple choice questions, multiple correct multiple choice questions, statement based questions and comprehension type questions..
Q1.
An organic compound (A) with molecular formula C7 H8 O dissolves in NaOH and gives characteristic colour with FeCl3. On treatment with Br2, it gives a tribromo product C7 H5 OBr3. The compound is:
An organic compound (A) with molecular formula C7 H8 O dissolves in NaOH and gives characteristic colour with FeCl3. On treatment with Br2, it gives a tribromo product C7 H5 OBr3. The compound is:
Solution
(c)
Four DU in A and (C:H≈1:1) suggest benzene ring with one extra C atom. Reactivity with NaOH and FeCl_3 suggests (A) to be a phenol. The formation of a tribromo product suggests that o- and p-positions are vacant. So methyl group should be present at m-position. Hence, (A) is m- cresol
(c)
Four DU in A and (C:H≈1:1) suggest benzene ring with one extra C atom. Reactivity with NaOH and FeCl_3 suggests (A) to be a phenol. The formation of a tribromo product suggests that o- and p-positions are vacant. So methyl group should be present at m-position. Hence, (A) is m- cresol
Q2.
Rubbing alcohol, used for rubdowns, on its evaporation reduces fever. It is cheaper and has replaced ethanol for this purpose. Its name is:
Rubbing alcohol, used for rubdowns, on its evaporation reduces fever. It is cheaper and has replaced ethanol for this purpose. Its name is:
Solution
d
d
Q3. Power alcohol is:
Solution
a
a
Q4.
Solution
a
a
Q5.
A compound (A) has a molecular formula C2 Cl3 OH. It reduces Fehling’s solution and on oxidation given a monocarboxylic acid (B). It can be obtained by the action of chlorine on ethyl alcohol, (A) is:
A compound (A) has a molecular formula C2 Cl3 OH. It reduces Fehling’s solution and on oxidation given a monocarboxylic acid (B). It can be obtained by the action of chlorine on ethyl alcohol, (A) is:
Solution
c
c
Q6. Which of the following alcohols is expected to give haloform test?
Solution
d
d
Q7.
Which statement is correct for the conversion of ROH to RX by reagents (A) (SOCl2,PBr3,PCl3,PI3 and TsCl) compared to using HX?
Which statement is correct for the conversion of ROH to RX by reagents (A) (SOCl2,PBr3,PCl3,PI3 and TsCl) compared to using HX?
Solution
d
d
Q8.Absolute alcohols (100% ethanol) are prepared from rectified sprit (95% ethanol) by mixing a suitable amount of ……… and subjected to fractional distillation (azeotropic distillation)
Solution
(d)
(d)
Q9.Which of the following will react fastest with Lucas reagent?
Solution
(c)
Lucas reagent (anhyd.ZnCl2+conc.HCl=1:1);reactivity is 3°>2°>1° alcohol; (c) is a 3°alcohol
(c)
Lucas reagent (anhyd.ZnCl2+conc.HCl=1:1);reactivity is 3°>2°>1° alcohol; (c) is a 3°alcohol
Q10.
Grain alcohol, a product of yeast fermentaion of sugars in grains and fruits, is:
Grain alcohol, a product of yeast fermentaion of sugars in grains and fruits, is:
Solution
(a)
(a)
