1. The compound which reacts fastest with Lucas reagent at room temperature is
(a) butan-1-ol
(b) butan-2-ol
(c) 2-methylpropan-1-ol
(d) 2-methylpropan-2-ol
Ans: (D)
2. Chlorination of toluene in the presence of light and heat followed by treatment with
aqueous
gives
(a) o-cresol
(b) p-cresol
(c) 2, 4-dihydroxytoluene
(d) benzoic acid
Ans: (D)
3. When phenol is treated with excess bromine water, it gives
(a) m-bromophenol
(b) o- and p-bromophenol
(c) 2, 4-dibromophenol
(d) 2, 4, 6-tribromophenol
Ans: (D)
4. The increasing order of boiling points of the below mentioned alcohols is
(I) 1, 2-dihydroxy benzene
(II) 1, 3-dihydroxy benzene
(III) 1, 4-dihydroxy benzene
(IV) hydroxyl benzene
(a)
(b)
(c)
(d)
Ans: (C)
5. The reaction products of
→ is
(a)
(b)
(c)
(d)
Ans: (A)
For Questions 6& 7 read the following passage:
An alcohol A, when heated with concentrated
gives an alkene B. when B is bubbled
through bromine water and the product obtained is dehydrohalogenated with excess of
sodamide, a new compound C is obtained. The compound C gives D when treated with
warm dilute
in presence of
D can also be obtained either by oxidizing A with
or form acetic acid through its calcium salt.
6. Compound B is:
(A) ethene
(B) propene
(C) butene
(D) but-2-ene
(B) Acetaldehyde
(C) Propanaldehyde (D) Ethyl alcohol
Ans: (A)
7. Compound D is:
(A) Acetone
Ans: (B)
8. 3, 3-Dimethylbutan-2-ol loses a molecule of water in the presence of concentrated
sulphuric acid to give X as a major product. X is
(A) 1,2 – Dimethylbut-2-ene
(B) 2,2 – Dimethylbut-2-ene
(C) 2,2 – Dimethylbutene
(D)1,2 – Dimethylbutene
Ans: None of the options are correct. Major product is 2,3 – Dimethylbut-2-ene due to
methyl shift.
9.
How many structure of F are possible?
(a) 2
(b) 5
(c) 6
(d) 3
Ans: (D)
10.
of
are 4.79, 3.9,10.0 and 2.6. Arrange
their conjugate bases in increasing leaving tendency.
( )
( )
( )
( )
Ans: (A)
11. Which one of the following compounds most readily undergoes substitution SN2
mechanism?
Ans: (B) 10 with least hindrance will undergo SN2 most readily.
12. How many of the following statement(s) is/are correct?
(i) The C – Cl bond in chlorobenzene is shorter than in chloromethane
(ii) The C – Cl bond in chlorobenzene has some double bond character
(iii) It is difficult to replace chlorine from chlorobenzene than from benzyl
chloride
(iv) Chlorobenzene on futher chlorination gives m – dichlorobenzne
(A) 3
(B) 1
(C) 2
(D) All
Ans: (A) Chlorobenzene though de-activates the ring, still is ortho-para orienting
13. 2, 2 Dichloro – 3 – methyl butane on hydrolysis forms
(A) Diethyl Ketone
(B) methyl isopropyl ketone
(C) 3 – methyl butane 2, 3 diol
(D) 2 – methyl butane 2, 3 diol
Ans: (B) It is a geminal di-halide, which on hydrolysis gives a ketone.
14.
→
. The compound (B) in above reaction is:
(A) Ethylene chloride
(B) Acetic acid
(C) Propionic acid
(D) Ethyl cyanide
Ans: (C)
15.
→
Ans: (A)
16.
Ans: (C) Chloroform is oxidized the poisonous phosgene
17.
Ans: (B)
18.
Ans: (C)
19. The order of reactivity towards SN2 mechanism is:
A) RBr > RCl > RI > RF
B) RI > RBr > RCl > RF
C) RF > RCl > RBr > RI
D) RCl > RF > RBr > RI
Ans: (B). Be it SN2 or SN1, RI bond being the weakest will lead to its fastest reactivity.
20.
Ans: B
21. Williamson synthesis of ethers follows the following mechanism:
(A) E1
(B)
(C)
(D)
Ans: (C)
For Questions 22 to 26, Refer to the paragraph given below:
The boiling point elevation and the freezing point depression of solution have a number of
) is used in automobile radiators as
practical applications. Ethylene glycol (
an antifreeze because it lowers the freezing point of the coolant. The same substance also
helps to prevent the radiator coolant from boiling away by elevating the boiling point.
Ethylene glycol has low vapour pressure. We away by elevating the boiling point. Ethylene
glycol has low vapour pressure. We can also use glycerol as antifreeze. For boiling point
elevation to occur, the solute must be non-volatile, but no such restriction applies to
) a fairly volatile liquid that
freezing point depression. For example, methanol (
boils only at 65 C is sometimes used as antifreeze in automobile radiators.
22.
Which of the following is a better reagent for depression in freezing point but not
for elevation in boiling point?
(a)
(B)
(C)
(D)
Ans: (A)
23.
124g each of the two reagents glycol and glycerol are added in 5kg water of the
radiators in the two cars. Which of the following statements is wrong?
(a) Both will act as antifreeze
(b) Glycol will be better
(c) Glycerol is better because its molar mass is greater than glycol
(d) Glycol is more volatile than glycerol
Ans: (C)
24.
620g glycol is added to 4 kg water in the radiator of a car. What amount of ice will
separate out at
?
kg
:
(a) 800g
(b) 900g
(c) 600g
(d) 1000g
Ans: (B)
25.
If cost of glycerol, glycol and methanol are same, then the sequence of economy to
use these compounds as antifreeze will be:
(a) glycerol>glycol>methanol
(c) methanol= glycol=glycerol
Ans: (B)
26.
(b) methanol> glycol> glycerol
(d) methanol> glycol< glycerol
Which among the following is the most volatile and the best antifreeze?
(a)
(B)
(C) Glycol
(d) Glycerol
Ans: (D)
27.
Mixing of two liquids and shows a slight increase in temperature (exothermic
nature). The solution formed will show:
(a) - interactions stronger then - and - interactions
(b) - interactions weaker than - and - interactions
(c) - interactions equal to - or - interactions
(d) cannot be decided
Ans: (A)
28.
Which of the following is correct for the reaction,
?
(a)
(c)
Ans: (A)
29.
(
)
(
)
(b)
(d)
(
(
)
)
Two liquids X and Y form ideal solution. At 300K vapour pressure of the solution
containing 1 mole of X and 3 moles of Y is 550 mm Hg. At the same temperature, if 1
mole of Y is further added to this solution, vapour pressure of the solution increases
by 10 mm Hg. Vapour pressure ( in mm Hg) of X and Y in their pure states will be ,
respectively:
(a) 300 and 400
(b) 400 and 600
(c) 500 and 600
(d) 200 and 300
Ans: (B)
( ),
(
) ( ),
30.
Consider separate solutions of 0.500
( ) and
( ) at
. Which statement is true about
these solutions, assuming all salts to be strong electrolytes?
(
) ( ) has highest osmotic pressure
(a) 0.100
( ) has highest osmotic pressure
(b)
( ) has highest osmotic pressure
(c) 0.500
(d) They all have the same osmotic pressure
Ans: (D)