Q.1
on Q183) This reaction is called as ...[BVP 2006]
ch-23_que_no-183_img_no1.png
  • a) Fischer-Siper reaction
  • b) Clemmensen reduction
  • c) Birch reduction
  • d) Arndt -Eistert synthesis
Q.2
Which of the following explains why propene undergoes electrophilic addition with HBr, but not with HCN?
  • a) Br- is better nucleophile than CN-
  • b) The C-Br bond is stronger than C-CN
  • c) HCN reacts preferablly via the lone pair of electron
  • d) HBr is a stronger acid than HCN and hence is a better souce of protons
Q.3
Octane number is zerop for ..[ CET Karnataka 2002]
  • a) iso-heptane
  • b) n-heptane
  • c) iso-octane
  • d) n-octane
Q.4
Ozonolysis of 2,3-dimethyl-1-butene followed by reduction with zinc and water gives ..[ IIT 1992]
  • a) Methanoic acid and 3-methyl-2-butanone
  • b) Methanal and 2-methl-2-butanone
  • c) Methanal and 3-methyl-2-butanone
  • d) Methanoic acid and 2-methyl-2-butanone
Q.5
on Q187) In the following reaction the major product 'X' is ...[ AMU 2010]
ch-23_que_no-187_img_no1.png
  • a)
    ch-23_qn-187choice_img_no1.png
  • b)
    ch-23_qn-187choice_img_no2.png
  • c)
    ch-23_qn-187choice_img_no3.png
  • d)
    ch-23_qn-187choice_img_no4.png
Q.6
According to Huckel rule, an aromatic compound must possess ...[ J & K CET 2007]
  • a) (4n + 1) π electrons
  • b) (4n + 2) π electrons
  • c) (2n+2)π electrons
  • d) 4nπ electrons
Q.7
During the preparation of alkanes by Kolbe's electroltic method using inert electrodes, the pH of the electrolyte ...
  • a) decreases progressively as the reaction proceeds
  • b) increases progressively as the reaction proceeds
  • c) remains constant througout the reaction
  • d) may decrease if the concentration of the electrolyte is not very high
Q.8
The substituent which is predominantly orth-para directing but deactivating in aromatic electrophilic substitution ...[ Kerala PMT 2010]
  • a) - BO2
  • b) - cl
  • c) - OCH3
  • d) - CH3
Q.9
On electrolysis of potassium succinate solution, the hydrocarbon obtained is ...[ JIPMER 2004]
  • a) ethene
  • b) ethane
  • c) ethyne
  • d) all of these
Q.10
The order of reactivity of following alkenes, when subjected to acid catalyzed hydration is ..[ AMU 2009] I. (CH3)2C = CH2 II. CH3CH = CH2 III. H2C = CH2
  • a) I > II > III
  • b) I > III > II
  • c) III > II > I
  • d) II > I > III
Q.11
Indicate the expected structure of the organic product when ethyl magnesium bromide is treated with heavy water (D2O) ...[ DEC 1994]
  • a) C2H5- C2H5
  • b) C2H5OD
  • c) Sodium nezoate
  • d) C2H5D
Q.12
Elimination of bromine from 2-bromobutane results in the formation of ...[ JCEC Med. 2008]
  • a) equimolar mixture of 1- and 2-butene
  • b) predominantly - 2 - butene
  • c) predominantly - 1 - butene
  • d) predominantly - 2 - butyne
Q.13
The products formed by the action of chlorine on ethane in saturated solution of KBr is/are [ Pb CET 1996]
  • a) ClCH2CH2Cl + ClCH2CH2Br
  • b) ClCH2CH2Cl
  • c) ClCH2CH2Cl + BrCH2CH2Br
  • d) ClCH2CH2Cl + BrCH2CH2Br+ ClCH2CH2Br
Q.14
Which hydrocarbon is mainly present is gobar gas? [ AFMC 2003]
  • a) Butane
  • b) Propane
  • c) Methane
  • d) Ethane
Q.15
Which species represents the electrophile in aromatic nitration? [ Pb PMT 1998]
  • a) NO2-
  • b) NO2+
  • c) NO2
  • d) NO3-
Q.16
The compound 1,2-butadiene has ..[ IIT 1983]
  • a) only sp-hybridised carbon atoms
  • b) only sp2-hybridised carbon atoms
  • c) both sp and sp2 -hybridised carbon atoms
  • d) sp, sp2 and sp3 -hybridised carbon atoms
Q.17
Identify the reagent from the following list which can easily distinguish between 1-butyn and 2-butyne ..[ IIT2002]
  • a) bromine, CCl4
  • b) H2, Lindlar catalyst
  • c) dilute H2SO4, HgSO4
  • d) ammonical Cu2Cl2 solution
Q.18
on Q199) Following reaction is called
ch-23_que_no-199_img_no1.png
  • a) Wurtz's reaction
  • b) Kolbe's reaction
  • c) Sabatier and Sendern's reaction
  • d) Carbylamine reaction
Q.19
A compound is treated with NaNH2 to give sodium salt. Identify the compound ..[ CBSE PMT 1993]
  • a) C2H2
  • b) C6H6
  • c) C2H6
  • d) C2H4
Q.20
Disubstituted derivatives of benzene are of type/types ...[ BCECE 2005]
  • a) 1
  • b) 2
  • c) 3
  • d) 6
Q.21
on Q202) In the reaction, the product C is ..... (BHU 1994)
ch-23_que_no-202_img_no1.png
  • a) C6H5OH
  • b) C6H6
  • c) C6H5COONa
  • d) C6H5ONa
Q.22
Which cycloalkane has the lowest heat of combustion per -CH2 group? [ CET Karnataka 2006]
  • a) cyclopropane
  • b) cyclobutane
  • c) cyclopentane
  • d) cyclohexane
Q.23
Ethylene reacts with 1% cold alkaline KMnO4 to form ..[ Hariyana CEET 1998]
  • a) Oxalic acid
  • b) Ethylene glycol
  • c) Ethy alcohol
  • d) HCOH
Q.24
Which of the following reagent distinguish ethylene from acetylene? [ BHU 2006]
  • a) Ammoniacal cuprous chloride
  • b) Br2 water
  • c) Alkaline KMnO4
  • d) Chlorine dissolved in CCl4
Q.25
Excess of CH3COOH is reacted with CH ≡ CH in presence of Hg2+, the product is ...[ BHU 1998]
  • a) CH3CH(OOCCH3)2
  • b) CH2= CH(OCOCH3)
  • c) (CH3COO)CH2 - CH2(OOCCH3)
  • d) None of these
Q.26
Acidic hydrogen is present in ...[ IIT 1984]
  • a) ethyne
  • b) ethene
  • c) benzene
  • d) ethane
Q.27
Which of the following possesses the highest melting point ? [ Manipal 2001]
  • a) Chlorobenzene
  • b) o-dichlorobenzene
  • c) m-dichlorobenzene
  • d) p-dichlorobenzene
Q.28
The compound with highest boiling point is .... [ IIT 1982]
  • a) n-Hexane
  • b) n-Pentane
  • c) 2,2-Dimethylpropane
  • d) 2-Methybutane
Q.29
The reaction of propen with HOCl (Cl2+H2O) proceeds through the intermediate ...[ IIT 2016]
  • a)
    ch-23_qn-210choice_img_no1.png
  • b)
    ch-23_qn-210choice_img_no2.png
  • c)
    ch-23_qn-210choice_img_no3.png
  • d)
    ch-23_qn-210choice_img_no4.png
Q.30
on Q211) Identify the alkyne in the following sequence of reaction:... [ EAMCET 2009]
ch-23_que_no-211_img_no1.png
  • a) H3C - C = C - CH3
  • b) H3C - CH2 - C ≡ CH
  • c) H2C = CH - C ≡ CH
  • d) HC ≡ C - CH2 - C ≡ CH
0 h : 0 m : 1 s