Q.1.
ion Q29) The major product of the following reaction is ..[ IIT 2008]
-
35%
a)
-
30%
b)
-
24%
c)
-
11%
d)
Q.2.
Bottle containing C6H5I and C6H5CH2I lost their original labels. They were labelled A and B for testing. A and B were separately taken in test tube and boiled with NaOH solution. The end solution in each tube was made acidic with dilute HNO3 and some AgNO3 solution was added. Substance B gave yellow precipitate. Which one of the following statements is true for this experiment? [ AIEEE 2003]
-
19%
a) A and C6H5CH2I
-
32%
b) B and C6H5I
-
27%
c) Addition of HNO3 was unnecessary
-
22%
d) A was C6H5I
Q.3.
The compound formed on heating chlorobenzene with chloral in presence of concentrated sulphuric acid, is [ AIEEE 2004]
-
13%
a) freon
-
35%
b) DDT
-
18%
c) gammexene
-
35%
d) hexachloroethane
Explanation
Q.4.
Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of [ AIEEE 2005]
-
41%
a) steric hindrance
-
27%
b) inductive effect
-
23%
c) instability
-
10%
d) insolubility
Q.5.
Phenyl magnesium bromide reacts with methanol to give [ AIEE 2006]
-
24%
a) a mixture of toluene and Mg(OH)Br
-
29%
b) a mixture of phenol and Mg(Me)Br
-
24%
c) a mixture of anisol and Mg(OH)Br
-
23%
d) a mixture of benzene and Mg(OMe)Br
Q.6.
benzene (C6H5F) can be synthesized in the laboratory..[ AIEEE 2006]
-
10%
a) by direct fluorination of benzene with F2 gas
-
19%
b) by reacting bromobenzene with NaF solution
-
21%
c) by heating phenol with HF and KF
-
50%
d) From aniline by diazotisation followed by heating the diazonium salt with HBF4
Explanation
Q.7.
Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces..[ AIEEE 2006]
-
27%
a) 1-phenylcyclopentene
-
25%
b) 3-phenylcyclopentene
-
27%
c) 4-phenylcyclopentene
-
20%
d) 2-phenylcyclopentene
Explanation
Q.8.
ion Q38) The structure of the major product formed in the following reaction ... [ AIEEE 2006]
-
21%
a)
-
43%
b)
-
18%
c)
-
18%
d)
Explanation
Q.9.
Which of the following is the correct order of decreasing SN2 reactivity [ AIEEE 2007]
-
20%
a) R2CHX > R3CX > RCH2X
-
26%
b) RCHX > R3CX > R2CHX
-
32%
c) RCH2X > R2CHX >R3CX
-
22%
d) R3CX >R2CHX >RCH2X
Q.10.
The organic chloro compound, which shows complete sterochemical inversion during a SN2 reaction is ..[ AIEEE 2008]
-
19%
a) (C2H5)2CHCl
-
26%
b) (CH3)3CCl
-
28%
c) (CH3)2CHCl
-
28%
d) CH3Cl
Q.11.
Ethyl alcohol is heated with conc. H2SO4 the product formed is .. [ IIT 1980]
-
31%
a)
-
33%
b) C2H6
-
23%
c) C2H4
-
13%
d) C2H2
Q.12.
Which of the following is basic [ IIT 1980]
-
22%
a) CH3CH2OH
-
38%
b) OHCH2CH2OH
-
27%
c) H-O-O-H
-
14%
d)
Q.13.
The compound which reacts fastest with Lucas reagent at room temperature is [ IIT 1981]
-
15%
a) butan-1-ol
-
34%
b) butan-2-ol
-
34%
c) 2-methylpropan-1-ol
-
17%
d) 2-methylpropan-2-ol
Q.14.
A compound that gives a positive iodoform test is [ IIT 1982]
-
19%
a) 1-pentanol
-
31%
b) 2-pentanone
-
31%
c) 3-pentanone
-
19%
d) pentanal
Explanation
Q.15.
Diethyl ether on heating with concentrated HI gives two moles of ..[ IIT 1983]
-
22%
a) ethanol
-
15%
b) iodoform
-
59%
c) ethyl iodide
-
5%
d) methyl iodide
Q.16.
n industrial method of preparation of methanol is .. [ IIT 1984]
-
25%
a) catalytic reduction of carbon monoxide in presence of ZnO-Cr2O3
-
28%
b) by reacting methane with steam at 900°C with nickel catalyst.
-
25%
c) by reducing formaldehyde with lithium aluminium hydride
-
22%
d) by reacting formaldehyde with aqueous sodium hydroxide solution
Explanation
Q.17.
When phenol is treated with excess bromine water, it gives [ IIT1984]
-
15%
a) m-bromophenol
-
37%
b) o- and p- bromophenol
-
20%
c) 2,4- dibromophenol
-
29%
d) 2,4,6 - tribromophenol
Explanation
Q.18.
HBr reacts fastest with [ IIT 1986]
-
42%
a) 2-methylpropan-2-ol
-
28%
b) propan-1-ol
-
19%
c) propan-2-ol
-
11%
d) 2-methylpropan-1-ol
Q.19.
Which of the following compounds is oxidised to prepare methyl ethyl ketone? [ IIT 1987]
-
28%
a) 2-propanol
-
14%
b) 1-nutanol
-
31%
c) 2-butanol
-
28%
d) t-butyl alcohol
Q.20.
Phenol reacts with bromine in carbon disulphate at low temperature to give [ IIT 1988]
-
17%
a) m-bromphenol
-
31%
b) o- and p- bromophenol
-
23%
c) p- bromophenol
-
29%
d) 2,4,6 - tribromophenol
Explanation
Q.21.
Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives [ IIT 1990]
-
18%
a) o-cresol
-
24%
b) p-cresol
-
41%
c) 2,4-dihydrozytoluene
-
18%
d) benzoic acid
Explanation
Q.22.
When phenol is reacted with CHCl3 and NaOH followed by acidification salicyladehyde is obtained. Which of the following species are involved in the above mentioned reaction as intermediate? [ IIT 1995]
-
9%
a)
-
38%
b)
-
38%
c)
-
16%
d)
Explanation
Q.23.
ion Q53) The order of reactivity of the following alcohol towards conc.HCl is [ IIT 1997]
-
17%
a) I > II > III > IV
-
27%
b) I > III > II > IV
-
40%
c) IV > III > II > I
-
17%
d) IV < III < II < I
Q.24.
The compound that will react most readily with NaOH to form methanol is [ IIT 2001]
-
17%
a) (CH3)4N+ I-
-
50%
b) CH3OCH3
-
3%
c) (CH3)3S+ I-
-
30%
d) (CH3)3CCl
Q.25.
1-propanol and 2-propanol can be best distinguished by [ IIT 2001]
-
36%
a) oxidation with alkaline KMnO4 followed by reaction with Fehling solution
-
46%
b) oxidation with acidic dichromate followed by reaction with Fehling solution
-
0%
c) oxidation by heating with copper followed by reaction with Fehling solution
-
18%
d) oxidation with concentrated H2SO4 followed by reaction with Fehling solution
Q.26.
ion Q56) [IIT 2003]
-
24%
a) C6H5OC2H5
-
31%
b) C2H5OC2H5
-
31%
c) C6H5OC6H5
-
14%
d) C6H5I
Q.27.
The product of acid catalyzed hydration of 2-phenylpropene is [ IIT 2004]
-
12%
a) 3-phenyl-2-propanol
-
29%
b) 1-phenyl-2-propanol
-
32%
c) 2-phenyl-2-propanol
-
26%
d) 2-phenyl-1-propanol
Explanation
Q.28.
The best method to prepare cyclohexene from cyclohexanol is by using [ IIT 2005]
-
37%
a) conc. HCl + ZnCl2
-
31%
b) conc. H3PO4
-
20%
c) HBr
-
11%
d) Conc. HCl
Q.29.
The reaction : C2H5OH + SOCl2 → C2H5Cl + SO2 + HCl[ in presence of pyridine] is known as [ AIIMS 2002]
-
20%
a) kharasch effect
-
33%
b) Williamson's synthesis
-
20%
c) Darzen's procedure
-
27%
d) Hunsdiecker reaction
Q.30.
The increasing order of boiling points of the below mentioned alcohol is I) 1,2-dihydroxbenzene II) 1,3-dihydroxybenzene III) 1,4-dihydroxybenzene IV) Hydroxybenzene [IIT 2006]
-
4%
a) I < II < IV < III
-
43%
b) I < II < III < IV
-
36%
c) IV < II < I < III
-
18%
d) IV < I < II < III