Q.1
Mono sodium acetylide reacts with an alkyl halide to form ...[ BHU 1994]
  • a) An alkane
  • b) An alkene
  • c) An unsymmetric higher alkyne
  • d) A symmmetric higher alyne
Q.2
Which of the following gives propyne on hydrolysis? [ AIIMS 2005]
  • a) Al4C3
  • b) Mg2C3
  • c) B4C
  • d) La4C3
Q.3
Ethyne can be oxidised to oxalic acid by using ...[ AMU 1998]
  • a) Chromic acid
  • b) Alkaline KMnO4
  • c) Hypochlorous acid
  • d) All reagents
Q.4
The negative part of the addendum adds on to the unsaturated carbon atom joined to the least number of hydrogen atoms. This statement is called ...[ AFMC 2004]
  • a) Saytzeff rule
  • b) Kharasch effect
  • c) Markownikoff's rule
  • d) Anti-Saytzeff rule
Q.5
In the reaction of C6H5Y, the major product (> 60%) is m- isomers, so the group Y is ...[ AIIMS 1997]
  • a) -COOH
  • b) -NH2
  • c) -OH
  • d) -Cl
Q.6
Which one of the following alkenes will react faster with H2 under catalytic hydrogenation condition? [ IIT 2000 ]
  • a)
    ch-23_qn-217choice_img_no1.png
  • b)
    ch-23_qn-217choice_img_no2.png
  • c)
    ch-23_qn-217choice_img_no3.png
  • d)
    ch-23_qn-217choice_img_no4.png
Q.7
The ortho/para directing group among the following is ...[ AIIMS 2003]
  • a) COOH
  • b) CN
  • c) COCH3
  • d) NHCOCH3
Q.8
Benzene can not undergo
  • a) elemeniation
  • b) substitution
  • c) addition
  • d) oxidation
Q.9
han one correct answer Q220) Using anhydrous AlCl3 as catalyst, which of the following reactions produces ethylbenzene (PhEt)? [ AIPMT 2004]
  • a) CH3CH2OH + C6H6
  • b) CH3CH=CH2 + C6H6
  • c) H2C = CH2 + C6H6.
  • d) H2C = CH2 + C6H6
Q.10
on Q221) In a set of reaction, ethylbenzene yielded a product (D) ..[ AIPMT 2010]
ch-23_que_no-221_img_no1.png
  • a)
    ch-23_qn-221choice_img_no1.png
  • b)
    ch-23_qn-221choice_img_no2.png
  • c)
    ch-23_qn-221choice_img_no3.png
  • d)
    ch-23_qn-221choice_img_no4.png
Q.11
Which of the following heptanols can be dehydrated to hept-3-ene only ..
  • a) Heptan-3-ol
  • b) Heptan-4-ol
  • c) Heptan-2-ol
  • d) Heptan-1-ol
Q.12
Which of the following alkenes will give an optically active alcohol when treated with H2O/ H2SO4 [ CPMT 2004]
  • a) 1-Butene
  • b) Ethene
  • c) Propene
  • d) 2-Methyl propene
Q.13
When cyclohexane is poured on water, it floats because ...[ IIT 1997]
  • a) Cyclohexane is in 'boat' form
  • b) Cyclohexane is in 'chair' form
  • c) Cyclohexane is in 'crown' form
  • d) Cyclohexane is less denser than water
Q.14
Which of the following will decolourise alkaline KMnO4 solution [ IIT 1998]
  • a) C3H8
  • b) CH4
  • c) CCl4
  • d) C2H4
Q.15
oftrhe following statements is/are incorrect
  • a) Bromination of p-nitrotoluene in presence of iron gives 2-bromo-4nitrotoluene
  • b) Sul;phonation of p-tert-butyltolune gives 5-tert-butyl-2-methyl-1-benzenesulphonicacvid
  • c) Nitration of m-xylens gives 2,4-dimethyl-1-nitrobenzene
  • d) Friedel-Crafts reaction of benzene with sec-butyl bromide predominantly gives isobutyl-benzene
Q.16
Which one of the following compound does not dissolve in conc. H2SO4, even on worming?
  • a) Aniline
  • b) Benzene
  • c) Hexane
  • d) Ethylene
Q.17
The synthesis of 3-octyne is achived by adding a bromoalkane into a mixture of sodium amide and an alyne. The bromoalkane and lakyne respectively are ... [ IIT 2010]
  • a) BrCH2CH2CH2CH2CH3 and CH3CH2C ≡ CH
  • b) BrCH2CH2CH3 and CH3CH2CH2C≡CH
  • c) BrCH2CH2CH2CH2CH3 and CH3C ≡ CH
  • d) BrCH2CH2CH2CH3 and CH3CH2C≡CH
Q.18
The carbon-carbon bond order in benzene is ...[ BCECE 2008]
  • a) 1
  • b) between 1 and 2
  • c) 1.5
  • d) 2
Q.19
For preparing an alkane, a concentrated solution of sodium or potassium salt of saturated carboxylic acid is subjected to ...[ MPPMT 1999]
  • a) hydrolysis
  • b) oxidation
  • c) hydrogenation
  • d) electrolysis
Q.20
on Q233) Following compound is an ...[DPMT 2007]
ch-23_que_no-233_img_no1.png
  • a) alkyne, 3°amine
  • b) alkene, 2°amine
  • c) alkene, 3°amine
  • d) alkyne, 2°amine
Q.21
The most suitable catalyst for the hydrogenation of 2-heyne → cis-hexene is
  • a) Pb-BaSO4
  • b) (Ph3P)3RhCl
  • c) 10%Pd-C
  • d) Raney Ni
Q.22
An alkane with a molecular formula. C6H14 reacts with chlorine in the presence of light and heat to give two constitutionally isomeric monochlorides of molecular formula, C6H13Cl. What is the most reasonable starting alkane? [ CET |(J&K) 2011]
  • a) n-Hexane
  • b) 2,2-Dimentylbutane
  • c) 2,3-Dimethylbutane
  • d) 3-Methylpentane
Q.23
on Q236)Among the following compounds, the decreasing order of reactivity towards electrophilic substitutiuon is ...[CBSE PMT 2000 ]
ch-23_que_no-236_img_no1.png
ch-23_que_no-236_img_no2.png
ch-23_que_no-236_img_no3.png
ch-23_que_no-236_img_no4.png
  • a) III > I > II > IV
  • b) IV > I > II > III
  • c) I > II > III > IV
  • d) II > I > III > IV
Q.24
The product(s) obtained via oxymercuration (HgSO4 + H2SO4) of 1-butyne would be ...[ IIT 1999]
  • a) CH3 - CH2 - CO - CH3
  • b) CH3 - CH2 - CH2 - CHO
  • c) CH3 - CH2 - CHO + HCHO
  • d) CH3 - CH2 - COOH + HCOOH
Q.25
The reaction, Benzene + Methyl halide → Tolune in presence of Anhyd. (AlCl3), is kown as .. [ AIIMSS 1998]
  • a) Kolbe reaction
  • b) Wurtz reaction
  • c) Perkin reaction
  • d) Friedel-Craft reaction
Q.26
What is the decreasing order of strength of bases OH-, NH2-, HC ≡C- and CH3CH2-? [ IIT 1993]
  • a) CH3CH2- > NH2- > HC ≡C- > OH-
  • b) HC≡ C- > CH3CH2- >NH2- > OH-
  • c) OH- > NH2- > HC ≡C-> CH3CH2-
  • d) NH2- > HC ≡ C- > OH- > CH3CH2-
Q.27
1-bromo-3-chlorocyclobutane when treated with two equivalents of Na, in the presence of ether which of the following will be formed? [ IIT 2005]
  • a)
    ch-23_qn-240choice_img_no1.png
  • b)
    ch-23_qn-240choice_img_no2.png
  • c)
    ch-23_qn-240choice_img_no3.png
  • d)
    ch-23_qn-240choice_img_no4.png
Q.28
The compound that is most reactive towards electrophilic nitration is ...[ AIPMT 2012]
  • a) toluene
  • b) benzene
  • c) nitrobenzene
  • d) benzoic acid
Q.29
Heating a mixture of sodium benzoate or benzoic acid and soda-lime gives ...[ AFMC 1999]
  • a) Benzene
  • b) Methane
  • c) Sodium benzoate
  • d) Calcium benzoate
Q.30
Which of the following reactions will yield 2,2-dibromo-propane? [ CEPMT 2004]
  • a) H2C = CHBr + HBr
  • b) CH3C ≡ CCH3 + 2HBr
  • c) CH3C ≡ CH + 2HBr
  • d) CH3CH = CHBr + HBr
0 h : 0 m : 1 s