Q.1.
Conversion of CH4 to CH3Cl is an example of .... ... reaction[KCET1998]
-
26%
a) Electrophilic substitution
-
15%
b) Nucleophilic substitution
-
53%
c) Free radical substitution
-
6%
d) Free radical addition
Q.2.
An alkene "A" on reaction with O3and Zn–H2O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene "A" gives "B" as the major product. The structure of product "B" is:.... [NEET 2019]
-
13%
a)
-
20%
b)
-
51%
c)
-
16%
d)
Q.3.
Which of the following alkane cannot be made in good yield by Wurtz reaction? [NEET 2020]
-
38%
a) n-Heptane
-
15%
b) n-Butane
-
14%
c) n-Hexane
-
33%
d) 2,3-Dimethylbutane
Q.4.
An alkene on ozonolysis gives methanal as one of the product. Its structure is ... [ NEET 2020 ]
-
31%
a)
-
11%
b) Rosenmund reaction
-
32%
c) Friedel-CCraft reaction
-
26%
d) Gattermann Hoch reaction
Explanation
Q.5.
An alkene on ozonolysis gives methanal as one of the product. Its structure is ...[ NEET 2020]
-
39%
a)
-
16%
b)
-
30%
c)
-
15%
d)
Q.6.
The number of sigma (σ) and pi (π) bonds in pent-2-en-4-yne is .... [NEET 2018]
-
65%
a) 10σ bonds and 3π bonds
-
18%
b) 8σ bonds and 5π bonds
-
14%
c) 11σ bonds and 2π bonds
-
4%
d) 13σ bonds and no π bonds
Q.7.
tion Q5) The most suitable reagent for the following conversion, is : .... [NEET 2019]
-
20%
a) Na/liquid NH3
-
49%
b) H2, Pd/C, quinoline
-
18%
c) Zn/HCl
-
13%
d) Hg2+/H+, H2O
Q.8.
tion Q6) The compound C7H8 undergoes the following reactions : The product ‘C’ is .... [ NEET 2018]
-
35%
a) 3-bromo-2,4,6-trichlorotoluene
-
33%
b) o-bromotoluene
-
24%
c) m-bromotoluene
-
9%
d) p-bromotoluene
Q.9.
than one correct option Q7) Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is ... [NEET 2018]
-
21%
a) CH3 – CH3
-
34%
b) CH2 = CH2
-
18%
c) CH ≡ CH
-
26%
d) CH4
Q.10.
than one correct answer Q9) Electrolysis of potassium acetate gives ..
-
12%
a) Ethylene
-
29%
b) Acetylene
-
24%
c) Ethane
-
36%
d) Potassium hydroxide
Q.11.
ion Q10) Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in figure The correct order of their boiling point is ..[ IIT Adv 2014]
-
12%
a) I > II > III
-
58%
b) III > II > I
-
21%
c) II > III > I
-
9%
d) III > I > II
Q.12.
Which one of the following is not formed when a mixture of methyl bromide and bromobenzene is heated with sodium metal in the presence of dry ether? [ Karnataka CET 2012]
-
3%
a) Ethane
-
26%
b) Diphenyl
-
41%
c) Propane
-
31%
d) Toluene
Q.13.
Addition of ICl on pronene gives the product
-
17%
a) CH3CHCHClCH3
-
37%
b) CH3CHClCH2Cl
-
13%
c) CH3CHICH2Cl
-
33%
d) CH3CHClCH2I
Explanation
Q.14.
Trans-2-butene + Br2 gives ..[ Guj CET 2006]
-
33%
a)
-
22%
b)
-
13%
c)
-
33%
d)
Explanation
Q.15.
Which of the following compounds will forma hydrocarbon on reaction with a Grignard reagent? [ CPMT 1988]
-
10%
a) CH3CO2CH3
-
40%
b) CH3CH2OH
-
27%
c) CH3CHO
-
23%
d) CH3COCH3
Q.16.
Methyl bromide is converted into ethane by heating it in ether medium with ...[ CET Karnataka 2006]
-
17%
a) Al
-
33%
b) Zn
-
37%
c) Na
-
13%
d) Cu
Explanation
Q.17.
Consider the following statements: A hydrocarbon of molecular formula C5H10 is a I. monosubstituted alkene II. disubstituted alkene III. trisubstituted alkene Which ofthe following statements are correct?
-
30%
a) I, II and III
-
37%
b) I and II
-
22%
c) II and III
-
11%
d) I and III
Explanation
Q.18.
ion Q17) What will be product when HBr is reacted with
-
25%
a)
-
11%
b)
-
50%
c)
-
14%
d)
Explanation
Q.19.
Thew product obtained when methyl magnesium bromide reacts with methyl alcohol is ..
-
17%
a) Acetone
-
20%
b) Alcohol
-
37%
c) Methane
-
27%
d) Ethane
Q.20.
Amongst the following compounds which can be most easily sulphonated ... [ IIT 1982]
-
31%
a) Benzene
-
23%
b) Nitrobenzene
-
31%
c) Tolune
-
15%
d) Chlorobenzene
Q.21.
When cyclohexane is poured on water, it floats because ...[ IIT 1997]
-
23%
a) cyclohexane is in 'boat' form
-
23%
b) cyclohexane is in 'chair' form
-
15%
c) cyclohexane is in 'crown' form
-
38%
d) cyclohexane is less dense than water
Q.22.
In the sulphonation of benzene, the electrophilic involved is ...[ Karanataka CET 2009]
-
28%
a) HSO4-
-
44%
b) SO3
-
20%
c) SO2
-
8%
d) SO42-
Q.23.
Which of the following is the most stable alkene? [ AFMC 2007]
-
25%
a) R2C = CR2
-
21%
b) RCH = CHR
-
21%
c) RCH = CH2
-
32%
d) H2C = CH2
Q.24.
eaction of alkenes with halogens is explosivew to case of ..[ Pb CET 1989]
-
60%
a) F2
-
12%
b) Cl2
-
12%
c) Br2
-
16%
d) I2
Q.25.
In order to get propane gas, which of the following should be subjected to sodalime decarboxylation? [ BVP 2006]
-
4%
a) Sodium formate
-
48%
b) Mixture of sodium acetate and sodium ethanoate
-
30%
c) Sodium butyrate
-
19%
d) Sodium propionate
Q.26.
Which of the following is not a meta-directing group? [ CPMT 1992]
-
16%
a) SO3H
-
20%
b) NO2
-
24%
c) CN
-
40%
d) NH2
Q.27.
ion Q27) [IIT 2003]
-
33%
a)
-
24%
b)
-
33%
c)
-
10%
d)
Explanation
Q.28.
Photochemical chlorination of alkane is initiated by a process of ...
-
13%
a) Pyrolysis
-
35%
b) Substitution
-
48%
c) Homolysis
-
4%
d) Peroxidation
Q.29.
Acidic hrdrogen is present in ... [ AFMC 1999]
-
38%
a) Ethyne
-
19%
b) Ethene
-
15%
c) Benzene
-
27%
d) Ethane
Q.30.
Which of the following compound does not dissolve in conc. H2SO4 even on worming? ..[ IIT 1983]
-
0%
a) Ethylene
-
0%
b) Benzene
-
0%
c) Hexane
-
0%
d) Aniline