JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank

done Alkyne Total Questions - 105

• question_answer1)
  Which of the following gases is used for welding [CPMT 1996]
  A)
  Methane done clear
  B)
  Ethane done clear
  C)
  Acetylene done clear
  D)
  Ethene done clear
  View Solution play_arrow

• question_answer2)
  A metallic carbide on treatment with water gives a colourless gas which burns readily in air and which gives a precipitate with ammoniacal silver nitrate solution. Gas evolved is [NCERT 1975; CPMT 1977; MP PET 2002]
  A)
  Methane done clear
  B)
  Ethane done clear
  C)
  Acetylene done clear
  D)
  Ethylene done clear
  View Solution play_arrow

• question_answer3)
  1-butyne reacts with cold alkaline \[KMn{{O}_{4}}\] to produce [AIIMS 1997]
  A)
  \[C{{H}_{3}}C{{H}_{2}}COOH\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}COOH\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}COOH+C{{O}_{2}}\] done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}COOH+HCOOH\] done clear
  View Solution play_arrow

• question_answer4)
  Identify the product D in the following series of reaction \[C{{H}_{3}}COOH\xrightarrow{LiAl{{H}_{4}}}A\underset{443K}{\mathop{\xrightarrow{{{H}^{+}}}}}\,B\xrightarrow{B{{r}_{2}}}C\underset{KOH}{\mathop{\xrightarrow{alc.}}}\,D\] [CBSE PMT 1998] Methane
  A)
  done clear
  B)
  Alcohol done clear
  C)
  Acetylene done clear
  D)
  Benzaldehyde done clear
  View Solution play_arrow

• question_answer5)
  The correct order towards bond length is [RPMT 1997]
  A)
  \[C-C<C=C<C\equiv C\] done clear
  B)
  \[C\equiv C<C=C<C-C\] done clear
  C)
  \[C=C<C\equiv C<C-C\] done clear
  D)
  \[C=C<C-C<C\equiv C\] done clear
  View Solution play_arrow

• question_answer6)
  In the molecule \[CH\equiv C-CH=C{{H}_{2}}\], the hybridisation of \[C-C\] bond is [Orissa JEE 2005]
  A)
  \[s{{p}^{2}}-sp\] done clear
  B)
  \[s{{p}^{3}}-s{{p}^{3}}\] done clear
  C)
  \[s{{p}^{2}}-s{{p}^{2}}\] done clear
  D)
  \[s{{p}^{3}}-sp\] done clear
  View Solution play_arrow

• question_answer7)
  The product formed when acetylene is passed through red hot tube is [BHU 1989; RPMT 2003]
  A)
  Benzene done clear
  B)
  Cyclohexane done clear
  C)
  Neoprene done clear
  D)
  Ethane done clear
  View Solution play_arrow

• question_answer8)
  Acetylenic hydrogens are acidic because [CBSE PMT 1989; Pb. PMT 1999]
  A)
  Sigma electron density of C-H bond in acetylene is nearer to carbon, which has 50% s-character done clear
  B)
  Acetylene has only one hydrogen on each carbon done clear
  C)
  Acetylene contains least number of hydrogens among the possible hydrocarbons having two carbons done clear
  D)
  Acetylene belongs to the class of alkynes with molecular formula \[{{C}_{n}}{{H}_{2n-2}}\] done clear
  View Solution play_arrow

• question_answer9)
  Which is the most suitable reagent among the following to distinguish compound (iii) from rest of the compounds (i) \[C{{H}_{3}}-C\equiv C-C{{H}_{3}}\] (ii) \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] (iii) \[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH\] (iv) \[C{{H}_{3}}-CH=C{{H}_{2}}\] [CBSE PMT 1989]
  A)
  Bromine in carbon tetrachloride done clear
  B)
  Bromine in acetic acid done clear
  C)
  Alkaline \[KMn{{O}_{4}}\] done clear
  D)
  Ammoniacal silver nitrate reagent done clear
  View Solution play_arrow

• question_answer10)
  A hydrocarbon of formula \[{{C}_{6}}{{H}_{10}}\] absorbs only one molecule of \[{{H}_{2}}\] upon catalytic hydrogenation. Upon ozonolysis, the hydrocarbon yields \[\overset{H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{O=C-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}}}\,}}\,-\overset{\,\,\,\,H}{\mathop{\overset{\,\,\,\,\,\,|}{\mathop{C{{H}_{2}}-C=O}}\,}}\,\] The hydrocarbon is [MP PMT 1986]
  A)
  Cyclohexane done clear
  B)
  Benzene done clear
  C)
  Cyclohexene done clear
  D)
  Cyclobutane done clear
  View Solution play_arrow

• question_answer11)
  Poisonous gas 'Lewissite' is obtained by the reaction of [MP PMT 2003]
  A)
  \[CH\equiv CH\] and \[AsC{{l}_{3}}\] done clear
  B)
  \[C{{H}_{2}}=C{{H}_{2}}\] and \[AsC{{l}_{3}}\] done clear
  C)
  \[CH\equiv CH\] and \[{{S}_{2}}C{{l}_{2}}\] done clear
  D)
  \[C{{H}_{2}}=C{{H}_{2}}\] and \[NOCl\] done clear
  View Solution play_arrow

• question_answer12)
  Products of the following reaction  \[C{{H}_{3}}C\equiv \,C\,C{{H}_{2}}C{{H}_{3}}\overset{(1)\ \ {{O}_{3}}}{\mathop{\xrightarrow[(2)\ Hydrolysis]{}}}\,\]....... are [CBSE PMT 2005]
  A)
  \[C{{H}_{3}}CHO+C{{H}_{3}}C{{H}_{2}}CHO\] done clear
  B)
  \[C{{H}_{3}}COOH+C{{H}_{3}}C{{H}_{2}}CHO\] done clear
  C)
  \[C{{H}_{3}}COOH+HOOCC{{H}_{2}}C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{3}}COOH+C{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer13)
  By coaltar distillation, which is not obtained [SCRA 1990; MP PMT 1986]
  A)
  Light oil done clear
  B)
  Middle oil done clear
  C)
  Heavy oil done clear
  D)
  Mobil oil done clear
  View Solution play_arrow

• question_answer14)
  Hydrocarbon containing following bond is most reactive [AIIMS 1987]
  A)
  \[C\equiv C\] done clear
  B)
  C = C done clear
  C)
  C - C done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer15)
  The shapes of methane, ethene and ethyne molecules are, respectively
  A)
  Tetrahedral, planar and linear done clear
  B)
  Tetrahedral, linear and planar done clear
  C)
  Pyramidal, planar and linear done clear
  D)
  Tetrahedral, pyramidal and planar done clear
  View Solution play_arrow

• question_answer16)
  To synthesize the unsymmetrical alkyne \[C{{H}_{3}}-C\equiv C-C{{H}_{2}}-C{{H}_{3}}\] the reagents needed would be
  A)
  Ethene, iodoethane, iodomethane and potassium hydroxide done clear
  B)
  Acetaldehyde, 1-bromopropane and conc. \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  1, 2-dichloroethane, 1-propanol and alcoholic potassium hydroxide done clear
  D)
  Ethyne, iodomethane, iodoethane and sodamide done clear
  View Solution play_arrow

• question_answer17)
  When propyne is treated with dilute \[{{H}_{2}}S{{O}_{4}}\] and \[HgS{{O}_{4}}\], the major product is [Kurukshetra CEE 2002]
  A)
  Propanal done clear
  B)
  Propanol done clear
  C)
  Propyl hydrogen sulphate done clear
  D)
  Propanone done clear
  View Solution play_arrow

• question_answer18)
  Which of the following will be the final product when \[{{C}_{2}}{{H}_{2}}\] reacts with HCl [DPMT 1984; AFMC 1982; Bihar MEE 1982]
  A)
  \[\underset{CHCl}{\mathop{\overset{CH\,\,\,\,\,}{\mathop{|\,|\,\,\,\,\,\,\,\,\,}}\,}}\,\] done clear
  B)
  \[\underset{CHC{{l}_{2}}}{\mathop{\overset{C{{H}_{3}}\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,}}\,}}\,\] done clear
  C)
  \[\underset{CHCl}{\mathop{\overset{CHCl}{\mathop{|\,|\,\,\,\,\,\,\,\,}}\,}}\,\] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer19)
  What is the end product of the following sequences of operations \[Ca{{C}_{2}}\xrightarrow{{{H}_{2}}O}A\underset{H{{g}^{++}}}{\mathop{\xrightarrow{\text{dil}\text{. }{{H}_{2}}S{{O}_{4}}}}}\,B\underset{{{H}_{2}}}{\mathop{\xrightarrow{Ni}}}\,C\] [CPMT 1978; MP PMT 1996]
  A)
  Methyl alcohol done clear
  B)
  Acetaldehyde done clear
  C)
  \[{{C}_{2}}{{H}_{5}}OH\] done clear
  D)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer20)
  \[R-C{{H}_{2}}-CC{{l}_{2}}-R\xrightarrow{\text{Reagent}}R-C\equiv C-R\] The reagent is [CBSE PMT 1989; MP PET 1995]
  A)
  Na done clear
  B)
  \[HCl\text{ and }{{H}_{2}}O\] done clear
  C)
  \[KOH\text{ in }{{C}_{2}}{{H}_{5}}OH\] done clear
  D)
  Zn done clear
  View Solution play_arrow

• question_answer21)
  Acetylene can be prepared from [CPMT 1988]
  A)
  Potassium fumarate done clear
  B)
  Calcium carbide done clear
  C)
  Ethylene bromide done clear
  D)
                  All of these                                    done clear
  View Solution play_arrow

• question_answer22)
  Acetylene is obtained by the electrolysis of [BHU 1986]
  A)
  Sodium succinate done clear
  B)
  Potassium fumarate done clear
  C)
  Both A and B done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer23)
  The compound \[{{C}_{3}}{{H}_{4}}\] has a triple bond, which is indicated by its reaction with [MP PMT 1999]
  A)
  Bromine water done clear
  B)
  Bayer's reagent done clear
  C)
  Fehling solution done clear
  D)
  Ammonical silver nitrate done clear
  View Solution play_arrow

• question_answer24)
  \[CH\equiv CH\underset{{{H}_{2}}S{{O}_{4}}}{\mathop{\xrightarrow{{{H}_{2}}O/H{{g}^{2+}}}}}\,X\xrightarrow{LiAl{{H}_{4}}}Y\xrightarrow{{{P}_{4}}/B{{r}_{2}}}Z\]Here Z is [JIPMER 2002]
  A)
  Ethylene bromide done clear
  B)
  Ethanol done clear
  C)
  Ethyl bromide done clear
  D)
  Ethylidene bromide done clear
  View Solution play_arrow

• question_answer25)
  \[CH\equiv CH\underset{\text{Pressure}}{\mathop{\xrightarrow{Ni{{(CN)}_{2}}}X}}\,\] . Here X in the reaction [JIPMER 2002]
  A)
  Benzene done clear
  B)
  Ethane done clear
  C)
  Cycloctatetraene done clear
  D)
  Cyclohexane done clear
  View Solution play_arrow

• question_answer26)
  A salt producing hydrocarbon among these compounds is [KCET (Engg.) 2002]
  A)
  Ethane done clear
  B)
  Methane done clear
  C)
  Ethene done clear
  D)
  Ethyne done clear
  View Solution play_arrow

• question_answer27)
  An unknown compound A has a molecular formula \[{{C}_{4}}{{H}_{6}}.\] When A is treated with an excess of \[B{{r}_{2}}\] a new substance B with formula \[{{C}_{4}}{{H}_{6}}B{{r}_{4}}\] is formed. A forms a white precipitate with ammoniacal silver nitrate solution. A may be [MP PET/PMT 1998]
  A)
  Butyne-1 done clear
  B)
  Butyne-2 done clear
  C)
  Butene-1 done clear
  D)
  Butene-2 done clear
  View Solution play_arrow

• question_answer28)
  Which of the following reacts with sodium with the elimination of hydrogen [BHU 1983]
  A)
  \[C{{H}_{4}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer29)
  Acetylene gives [CPMT 1985]
  A)
  White precipitate with \[AgN{{O}_{3}}\] and red precipitate with \[C{{u}_{2}}C{{l}_{2}}\] done clear
  B)
  White precipitate with \[C{{u}_{2}}C{{l}_{2}}\] and red precipitate with \[AgN{{O}_{3}}\] done clear
  C)
  White precipitate with both the reagents done clear
  D)
  Red precipitate with both the reagents done clear
  View Solution play_arrow

• question_answer30)
  The bond length between \[s{{p}^{3}}\] hybridised carbon atom and other carbon atom is minimum in [CBSE PMT 1996; Pb. PMT 1999]
  A)
  Propane done clear
  B)
  Butane done clear
  C)
  Propene done clear
  D)
  Propyne done clear
  View Solution play_arrow

• question_answer31)
  The C - H bond length is minimum in the bond formed by
  A)
  sp - s overlapping (as in alkynes) done clear
  B)
  \[s{{p}^{2}}-s\] overlapping (as in alkenes) done clear
  C)
  \[s{{p}^{3}}-s\] overlapping (as in alkanes) done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer32)
  Which of the C - C bond is strongest
  A)
  Formed by \[s{{p}^{3}}-s{{p}^{3}}\] hybridised carbon atoms (as in alkanes) done clear
  B)
  Formed by \[s{{p}^{2}}-s{{p}^{2}}\] hybridised carbon atoms (as in alkenes) done clear
  C)
  Formed by \[sp-sp\] hybridised carbon atoms (as in alkynes) done clear
  D)
  All are equal done clear
  View Solution play_arrow

• question_answer33)
  Which of the following pairs has the same bond angle
  A)
  Ethane and ethylene done clear
  B)
  Ethylene and acetylene done clear
  C)
  Ethylene and benzene done clear
  D)
  Acetylene and benzene done clear
  View Solution play_arrow

• question_answer34)
  The product(s) obtained via oxymercuration \[(HgS{{O}_{4}}+{{H}_{2}}S{{O}_{4}})\] of 1-butyne would be [IIT-JEE 1999]
  A)
  \[\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}{\mathop{\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C-C{{H}_{3}}}}\,}}\,\] done clear
  B)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-CHO\] done clear
  C)
  \[C{{H}_{3}}-C{{H}_{2}}-CHO+HCHO\] done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}COOH+HCOOH\] done clear
  View Solution play_arrow

• question_answer35)
  A compound is treated with \[NaN{{H}_{2}}\] to give sodium salt. Identify the compound [AFMC 1998]
  A)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  B)
  \[{{C}_{6}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer36)
  A gas decolourises bromine in \[CC{{l}_{4}}\] and forms a precipitate with ammoniacal silver nitrate. The gas is [EAMCET 1998]
  A)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  D)
  \[C{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer37)
  Among the following compounds which have more than one type of hybridisation for carbon atom (i) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] (ii) \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\] (iii) \[C{{H}_{2}}=CH-C\equiv CH\] (iv) \[H-C\equiv C-H\] [EAMCET 1998]
  A)
  (ii) and (iii) done clear
  B)
  (ii) done clear
  C)
  (iii) and (iv) done clear
  D)
  (iv) done clear
  View Solution play_arrow

• question_answer38)
  The homologue of ethyne is [EAMCET 1998]
  A)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{3}}{{H}_{8}}\] done clear
  D)
  \[{{C}_{3}}{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer39)
  When acetylene reacts with HCl in the presence of \[HgC{{l}_{2}}\], the product is [MNR 1985; MP PET 1996; UPSEAT 2000]
  A)
  Methyl chloride done clear
  B)
  Dichloroethane done clear
  C)
  Vinyl chloride done clear
  D)
  Ethylidine chloride done clear
  View Solution play_arrow

• question_answer40)
  When propyne reacts with aqueous \[{{H}_{2}}S{{O}_{4}}\] in the presence of \[{{C}_{2}}{{H}_{4}}\], the major product is [IIT-JEE 1983; AFMC 1991; KCET 1993]
  A)
  Propanal done clear
  B)
  Propyl hydrogen sulphate done clear
  C)
  Acetone done clear
  D)
  Propanol done clear
  View Solution play_arrow

• question_answer41)
  Propyne on polymerisation gives [CPMT 1999, 2002]
  A)
  Mesitylene done clear
  B)
  Benzene done clear
  C)
  Ethyl benzene done clear
  D)
  Propyl benzene done clear
  View Solution play_arrow

• question_answer42)
  When treated with ammoniacal cuprous chloride, which one among the following forms copper derivative [CBSE PMT 1989; MP PMT 1993]
  A)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  D)
  \[{{C}_{6}}{{H}_{6}}\] done clear
  View Solution play_arrow

• question_answer43)
  Which of the following catalyst is used in the polymerisation of \[CH\equiv CH\] to \[{{C}_{6}}{{H}_{6}}\] [CPMT 1999]
  A)
  \[AlC{{l}_{3}}\] done clear
  B)
  \[HgS{{O}_{4}}\] done clear
  C)
  \[NbC{{l}_{3}}\] done clear
  D)
  HCl done clear
  View Solution play_arrow

• question_answer44)
  \[KMn{{O}_{4}}\] will oxidise acetylene to [CPMT 1999]
  A)
  Ethylene glycol done clear
  B)
  Ethyl alcohol done clear
  C)
  Oxalic acid done clear
  D)
  Acetic acid done clear
  View Solution play_arrow

• question_answer45)
  Ethyne on reaction with dil. \[{{H}_{2}}S{{O}_{4}}\] and \[Hg(\text{II})\] gives
  A)
  Ethanol done clear
  B)
                  Ethanal                      done clear
  C)
  Methoxymethane done clear
  D)
  Ethyl hydrogen sulphate done clear
  View Solution play_arrow

• question_answer46)
  Which of the following is used to distinguish ethylene and acetylene [MP PET 2000; KCET 2000; JIPMER 2000; CPMT 1977; NCERT 1973]
  A)
  Alkaline \[KMn{{O}_{4}}\] done clear
  B)
  Bromine water done clear
  C)
  Ammoniacal cuprous chloride done clear
  D)
  Conc. \[{{H}_{2}}S{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer47)
  The distinguishing test for triple bond containing acidic hydrogen is [JIPMER 2000]
  A)
  \[Ag{{(N{{H}_{3}})}_{2}}^{+}\] done clear
  B)
  \[B{{r}_{2}}\]in \[CC{{l}_{4}}\] done clear
  C)
  Alkaline\[KMn{{O}_{4}}\] done clear
  D)
  \[AlC{{l}_{3}}\] done clear
  View Solution play_arrow

• question_answer48)
  If acetylene is passed through an electric arc in the atmosphere of nitrogen, the compound formed is [RPMT 1999]
  A)
  HCN done clear
  B)
  Pyrrole done clear
  C)
  Pyrazole done clear
  D)
  Pyridine done clear
  View Solution play_arrow

• question_answer49)
  Ozonolysis of acetylene gives [RPMT 1999]
  A)
  Glycol done clear
  B)
  Glyoxal,formic acid done clear
  C)
  Formaldehyde done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer50)
  The bond length between the hybridised carbon atom and other carbon atom is minimum in [Pb. PMT 2000]
  A)
  Butane done clear
  B)
  Propyne done clear
  C)
  Propene done clear
  D)
  Propane done clear
  View Solution play_arrow

• question_answer51)
  The reaction of propene with HOCl  proceeds via the addition of     [IIT-JEE (Screening) 2001]
  A)
  \[{{H}^{+}}\]in the first step done clear
  B)
  \[C{{l}^{+}}\]in the first step done clear
  C)
  \[O{{H}^{-}}\]in the first step done clear
  D)
  \[C{{l}^{+}}\]and \[O{{H}^{-}}\]in a single step done clear
  View Solution play_arrow

• question_answer52)
  Acetylene reacts with ammonical \[AgN{{O}_{3}}\] forming [MH CET 1999; CPMT 1984, 86; MP PMT 1997]
  A)
  Silver acetylene done clear
  B)
  Silver acetate done clear
  C)
  Metal silver done clear
  D)
  Silver mirror done clear
  View Solution play_arrow

• question_answer53)
  Ethylidine dichloride can be prepared by the reaction of HCl and [MH CET 1999]
  A)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{5}}\] done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer54)
  Which of the following order of reagent is chosen to prepare 1, 3-butadiene from \[{{C}_{2}}{{H}_{2}}\] [RPET 2000]
  A)
  \[CuCl/N{{H}_{4}}Cl\] and \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] done clear
  B)
  \[N{{H}_{4}}Cl/CuCl\] and \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] done clear
  C)
  \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] and \[CuCl/N{{H}_{4}}Cl\] done clear
  D)
  \[{{H}_{2}}/Pd(BaS{{O}_{4}})\] and \[N{{H}_{4}}Cl/CuCl\] done clear
  View Solution play_arrow

• question_answer55)
  Benzene is the polymer of [RPET 1999; Bihar MEE 1999]
  A)
  Methane done clear
  B)
  Ethane done clear
  C)
  Ethylene done clear
  D)
  Ethyne done clear
  View Solution play_arrow

• question_answer56)
  \[\underset{CH}{\mathop{\overset{CH}{\mathop{|||}}\,}}\,\]reacts with acetic acid in presence of Hg2+ to give [BHU 2005]
  A)
  \[\underset{CH{{(C{{H}_{3}}COO)}_{2}}}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}}\,\] done clear
  B)
  \[\underset{CH{{(C{{H}_{3}}COO)}_{2}}}{\mathop{\overset{CH{{(C{{H}_{3}}COO)}_{2}}}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}}\,\] done clear
  C)
  \[\underset{C{{H}_{2}}(C{{H}_{3}}COO)}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}}\,\] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer57)
  Acetylene is prepared industrially by passing electric discharge through graphite electrodes in the atmosphere of [CPMT 1985]
  A)
  Air done clear
  B)
  \[{{N}_{2}}\] done clear
  C)
  \[{{H}_{2}}\] done clear
  D)
  \[C{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer58)
  When acetylene is passed into dilute sulphuric acid containing \[H{{g}^{2+}}\] ions, the product formed is [DPMT 1996; Roorkee 1995; BHU 1998; KCET 1999; MP PET 1985, 86; DCE 1999; DPMT 1999, 2002; CPMT 1975, 82, 83, 90; MP PMT 1994, 97; CBSE PMT 1999; AIIMS 2002; CBSE PMT 1999; KCET (Med.) 1999, JIPMER 1999]
  A)
  Acetone done clear
  B)
  Acetic acid done clear
  C)
  Acetaldehyde done clear
  D)
  Formaldehyde done clear
  View Solution play_arrow

• question_answer59)
  Which of the following has acidic hydrogen [IIT-JEE 1985, 89; CPMT 1986; Bihar MEE 1997; RPET 1999; AFMC 1999]
  A)
  Ethyne done clear
  B)
  Ethene done clear
  C)
  Ethane done clear
  D)
  Benzene done clear
  View Solution play_arrow

• question_answer60)
  Xylenes on oxidation with acidic \[KMn{{O}_{4}}\]gives [JIPMER 2000]
  A)
  Terphthalic acid done clear
  B)
  Phthalic acid done clear
  C)
  Isophthalic acid done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer61)
  The structure of the product(Z) in the reactions given below \[HC\equiv CH\underset{{{H}^{+}}}{\mathop{\xrightarrow{NaN{{H}_{2}},C{{H}_{3}}COC{{H}_{3}}}}}\,X\underset{{{H}_{2}}O}{\mathop{\xrightarrow{H{{g}^{2+}},{{H}_{3}}{{O}^{+}}}}}\,Z\] is [Roorkee 2000]
  A)
  \[\begin{array}{*{35}{l}}    C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}OH  \\ \end{array}\] done clear
  B)
  \[C{{H}_{3}}-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{C{{H}_{3}}}{\mathop{\overset{\,\,\,|\,\,\,\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}OH\] done clear
  C)
  \[C{{H}_{3}}-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,\,}{\mathop{\underset{OH}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{C\,-\,}}\,}}\,}}\,}}\,C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{3}}-CHOH-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,}{\mathop{CH}}\,-}}\,CHO\] done clear
  View Solution play_arrow

• question_answer62)
  Carbon-carbon bond length is minimum in [CBSE PMT 1988, 91; MNR 1984; CPMT 1989; RPMT 1997; Pb. PMT 2001]
  A)
  Ethane done clear
  B)
  Ethene done clear
  C)
  Ethyne done clear
  D)
  Benzene done clear
  E)
  Ethanol done clear
  View Solution play_arrow

• question_answer63)
  Triple bond of ethyne is made of or Cylindrical shape of an alkyne is due to [EAMCET 1978; NCERT 1979; CBSE PMT 1997; Manipal MEE 1995; Bihar MEE 1996]
  A)
  Three \[\sigma -\text{bonds}\] done clear
  B)
  Three \[\pi -\text{bonds}\] done clear
  C)
  Two \[\sigma \] and one \[\pi -\text{bond}\] done clear
  D)
  Two \[\pi \] and one \[\sigma -\text{bond}\] done clear
  View Solution play_arrow

• question_answer64)
  An organic compound has a triple bond and not double bond. It can be tested by [MP PMT 2000, 03]
  A)
  Bromine water done clear
  B)
  Bayer's reagent done clear
  C)
  Fehling solution done clear
  D)
  Ammonical silver nitrate done clear
  View Solution play_arrow

• question_answer65)
  Which of these will not react with acetylene [AIEEE 2002; DCE 2002]
  A)
  NaOH done clear
  B)
  Ammonical \[AgN{{O}_{3}}\] done clear
  C)
  Na done clear
  D)
  HCl done clear
  View Solution play_arrow

• question_answer66)
  What is the product when acetylene reacts with hypochlorous acid [RPMT 2002; AIEEE 2002]
  A)
  \[C{{H}_{3}}COCl\] done clear
  B)
  \[ClC{{H}_{2}}CHO\] done clear
  C)
  \[C{{l}_{2}}CHCHO\] done clear
  D)
  \[ClCHCOOH\] done clear
  View Solution play_arrow

• question_answer67)
  The alkene \[{{C}_{6}}{{H}_{10}}\] producing \[OHC-{{(C{{H}_{2}})}_{4}}-CHO\] on ozonolysis is [Roorkee 1999]
  A)
  Hexene-1 done clear
  B)
  Hexene-3 done clear
  C)
  Cyclohexene done clear
  D)
  1-methylcyclohexene-1 done clear
  View Solution play_arrow

• question_answer68)
  The number of moles of proton which can be easily given by butyne-1(1 mole) is [MP PMT 2000]
  A)
  1 done clear
  B)
  2 done clear
  C)
  3 done clear
  D)
  6 done clear
  View Solution play_arrow

• question_answer69)
  Which will undergo reaction with ammoniacal \[AgN{{O}_{3}}\] [DPMT 1996]
  A)
  \[\begin{matrix}    C{{H}_{3}}  \\    C{{H}_{3}}  \\ \end{matrix}>CH-C{{H}_{2}}-CH=CH-C{{H}_{3}}\] done clear
  B)
  \[C{{H}_{3}}-CH=CH-C\equiv CH\] done clear
  C)
  \[C{{H}_{3}}-C{{H}_{2}}-CH=CH-C{{H}_{2}}-C{{H}_{3}}\] done clear
  D)
  \[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{3}}\] done clear
  E)
  None done clear
  View Solution play_arrow

• question_answer70)
  Acetylene gas when passed through the 20% \[{{H}_{2}}S{{O}_{4}}\text{ at }{{80}^{o}}C\] gives acetaldehyde. The catalyst required for this conversion is [CPMT 1983]
  A)
  Anhydrous \[AlC{{l}_{3}}\] done clear
  B)
  \[HgS{{O}_{4}}\] done clear
  C)
  Pd done clear
  D)
  Pt done clear
  View Solution play_arrow

• question_answer71)
  Which of the following reactions will yield 2, 2-dibromopropane [MNR 1993; UPSEAT 2001]
  A)
  \[HC\equiv CH+2HBr\to \] done clear
  B)
  \[C{{H}_{3}}C\equiv CH+2HBr\to \] done clear
  C)
  \[C{{H}_{3}}CH=C{{H}_{2}}+HBr\to \] done clear
  D)
  \[C{{H}_{3}}CH=CHBr+HBr\to \] done clear
  View Solution play_arrow

• question_answer72)
  Which of the following does not give white precipitate with ammoniacal \[AgN{{O}_{3}}\]
  A)
  \[CH\equiv CH\] done clear
  B)
  \[C{{H}_{3}}-C\equiv CH\] done clear
  C)
  \[C{{H}_{3}}-C\equiv C-C{{H}_{3}}\] done clear
  D)
  \[\underset{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}-C\equiv CH}}\,}}\,\] done clear
  View Solution play_arrow

• question_answer73)
  \[\underset{CH}{\mathop{\overset{CH}{\mathop{|\,|\,|}}\,}}\,\xrightarrow{{{O}_{3}}/NaOH}X\xrightarrow{Zn/C{{H}_{3}}COOH}Y\] ?Y? is [AIIMS 1988]
  A)
  \[\underset{C{{H}_{2}}OH}{\mathop{\overset{C{{H}_{2}}OH}{\mathop{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}}\,\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}OH\] done clear
  C)
  \[C{{H}_{3}}COOH\] done clear
  D)
  \[C{{H}_{3}}OH\] done clear
  View Solution play_arrow

• question_answer74)
  Which is represented by the formula \[{{C}_{n}}{{H}_{2n-2}}\] [CPMT 1975, 76; EAMCET 1979; MP PET 2003
  A)
  Alkane done clear
  B)
  Alkyne done clear
  C)
  Alkene done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer75)
  What is the major product of the following reaction  \[C{{H}_{3}}C\equiv C-C{{H}_{2}}-C{{H}_{3}}\xrightarrow{1\,\,\text{mole}\,\,\text{of}\,C{{l}_{2}}}\] [Kerala (Med.) 2003]
  A)
  \[\begin{matrix}    CI\,\,\,  \\    C{{H}_{3}}  \\ \end{matrix}>C=C<\begin{matrix}    Cl\,\,\,\,\,\,\,\,\,\,\,  \\    C{{H}_{2}}C{{H}_{3}}  \\ \end{matrix}\] done clear
  B)
  \[C{{H}_{3}}-C{{H}_{2}}-\underset{\,\,Cl}{\overset{\,Cl}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{2}}C{{H}_{3}}\] done clear
  C)
  \[\begin{matrix}    Cl\,\,\,  \\    C{{H}_{3}}  \\ \end{matrix}>C=C<\begin{matrix}    C{{H}_{2}}C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,  \\    Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\ \end{matrix}\] done clear
  D)
  \[C{{H}_{3}}-\underset{\,Cl}{\overset{\,Cl}{\mathop{\underset{|}{\overset{|\,}{\mathop{C}}}\,}}}\,-\underset{\,Cl}{\overset{\,Cl}{\mathop{\underset{|\,}{\overset{\,|\,\,}{\mathop{C\,}}}\,}}}\,-C{{H}_{2}}C{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer76)
  A compound \[{{C}_{5}}{{H}_{8}}\] which give white ppt. with ammonical \[AgN{{O}_{3}}\].  A give \[{{(C{{H}_{3}})}_{2}}CHCOOH\] with hot alcoholic KOH then compound is [RPMT 2002]
  A)
  \[C{{H}_{3}}C{{H}_{2}}-C{{H}_{2}}-CH=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH\] done clear
  C)
  \[{{(C{{H}_{3}})}_{2}}CH-C\equiv CH\] done clear
  D)
  \[C{{H}_{2}}=CH-C{{H}_{2}}-CH=C{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer77)
  1, 2-dibromoethane when heated with alcoholic potash gives [Kerala PMT 2004]
  A)
  Ethane done clear
  B)
   Acetylene done clear
  C)
  Ethylene done clear
  D)
  Methane done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer78)
  Which of the following is not a member of homologous series [RPMT 2002]
  A)
  Ethene done clear
  B)
  1-butene done clear
  C)
  2-butene done clear
  D)
  2-butyne done clear
  View Solution play_arrow

• question_answer79)
  The compound formed as a result of potassium permanganate oxidation of ethylbenzene is [MP PET/PMT 1998]
  A)
  Benzoic acid done clear
  B)
  Benzyl alcohol done clear
  C)
  Benzophenone done clear
  D)
  Acetophenone done clear
  View Solution play_arrow

• question_answer80)
  What is the product when 2-butyne is treated with liquid \[N{{H}_{3}}\]in presence of lithium [Orissa JEE 2003]
  A)
  n-butane done clear
  B)
  cis-2-butene done clear
  C)
  trans-2-butene done clear
  D)
  1-butene done clear
  View Solution play_arrow

• question_answer81)
  Distinction in pentene-1 and pentyne-1 is done by [CPMT 1996]
  A)
  \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}}\] done clear
  B)
  Conc. \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  HCl done clear
  D)
  \[B{{r}_{2}}\] done clear
  View Solution play_arrow

• question_answer82)
  A mixture of ethane, ethene and ethyne is passed through ammoniacal \[AgN{{O}_{3}}\] solution. The gases which remain unreacted are [CPMT 1990]
  A)
  Ethane and ethene done clear
  B)
  Ethane and ethyne done clear
  C)
  Ethene and ethyne done clear
  D)
  Ethane only done clear
  View Solution play_arrow

• question_answer83)
  In its reaction with silver nitrate acetylene shows [MP PET 1999]
  A)
  Oxidising property done clear
  B)
  Reducing property done clear
  C)
  Basic property done clear
  D)
  Acidic property done clear
  View Solution play_arrow

• question_answer84)
  Simplest alkyne is represented by [CPMT 1974]
  A)
  CH done clear
  B)
  \[C{{H}_{2}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer85)
  Which of the following bonds is most acidic
  A)
  = C - H done clear
  B)
  \[-C-H\] done clear
  C)
  \[\equiv C-H\] done clear
  D)
  All are equally acidic done clear
  View Solution play_arrow

• question_answer86)
  The hybridisation in methane, ethene and Ethyne respectively is [CPMT 2003]
  A)
  sp3, sp2 and sp done clear
  B)
  sp3, sp, sp2 done clear
  C)
  sp2, sp3 and sp done clear
  D)
  sp3, sp2, sp done clear
  View Solution play_arrow

• question_answer87)
  Number of acidic hydrogen atoms in butyne-1 are [MP PET 1986]
  A)
  2 done clear
  B)
  3 done clear
  C)
  1 done clear
  D)
  4 done clear
  View Solution play_arrow

• question_answer88)
  Which of the following shows linear structure [CPMT 2003]
  A)
  Ethane done clear
  B)
  Ethene done clear
  C)
  Acetylene done clear
  D)
  \[CC{{l}_{4}}\] done clear
  View Solution play_arrow

• question_answer89)
  Calcium carbide on reacting with water gives [CBSE PMT 1991; MP PMT 1993, 94; RPMT 2002; J & K 2005]
  A)
  Methane done clear
  B)
  Ethane done clear
  C)
  Ethene done clear
  D)
  Acetylene done clear
  View Solution play_arrow

• question_answer90)
  Addition of HCN to ethyne in presence of \[Ba{{(CN)}_{2}}\] as catalyst gives [AFMC 1991]
  A)
  1, 1-dicyano ethane done clear
  B)
  Ethyl cyanide done clear
  C)
  Vinyl cyanide done clear
  D)
  Divinyl cyanide done clear
  View Solution play_arrow

• question_answer91)
  Which compound will react with an aqueous solution of \[Ag(N{{H}_{3}})_{2}^{+}O{{H}^{-}}\] [DPMT 2000]
  A)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  B)
  \[C{{H}_{3}}-C{{H}_{3}}\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}C\equiv CH\] done clear
  D)
  \[C{{H}_{3}}-C\equiv C-C{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer92)
  Which of the following give \[{{H}_{2}}\]gas with Na [RPMT 2002]
  A)
  \[C{{H}_{4}}\] done clear
  B)
  \[{{C}_{2}}{{H}_{6}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{4}}\] done clear
  D)
  \[{{C}_{2}}{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer93)
  \[C{{H}_{3}}-C\equiv CH\underset{Zn/{{H}_{2}}{{O}_{2}}}{\mathop{\xrightarrow{{{O}_{3}}}}}\,\text{Product}\].Product in above reaction is [RPMT 2003]
  A)
  \[C{{H}_{3}}COOH\] done clear
  B)
  \[HCOOH\] done clear
  C)
  Both A and B done clear
  D)
  \[C{{H}_{3}}CHO+HCHO\] done clear
  View Solution play_arrow

• question_answer94)
  The number of \[\pi -\text{bonds}\] in the product formed by passing acetylene through dilute sulphuric acid containing mercuric sulphate is [EAMCET 1997]
  A)
  Zero done clear
  B)
  One done clear
  C)
  Two done clear
  D)
  Three done clear
  View Solution play_arrow

• question_answer95)
  Which of the following is weakly acidic
  A)
  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
  B)
  \[{{C}_{6}}{{H}_{6}}\] done clear
  C)
  \[C{{H}_{3}}-C\equiv CH\] done clear
  D)
  \[C{{H}_{3}}-C\equiv C-C{{H}_{  3}}\] done clear
  View Solution play_arrow

• question_answer96)
  Which of the following reactions is shown by alkynes [AMU 1984; RPMT 2000]
  A)
  Addition done clear
  B)
  Substitution done clear
  C)
  Polymerization done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer97)
  Shortest C-C bond length is present in [BVP 2004]
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{3}}\] done clear
  B)
   \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] done clear
  C)
  \[C{{H}_{2}}=CH-CH=C{{H}_{2}}\] done clear
  D)
  \[CH\equiv C-C\equiv CH\] done clear
  View Solution play_arrow

• question_answer98)
  Acetylene can be obtained by the reaction [MH CET 2004]
  A)
  \[HCOOK\xrightarrow{\text{electrolysis}}\] done clear
  B)
   \[CH{{I}_{3}}+6Ag+CH{{I}_{3}}\xrightarrow{\Delta }\] done clear
  C)
  \[C{{H}_{3}}C{{H}_{2}}OH\underset{443{}^\circ C}{\mathop{\xrightarrow{\text{Conc}\text{. }{{H}_{2}}S{{O}_{4}}}}}\,\] done clear
  D)
  \[B{{e}_{2}}C+{{H}_{2}}O\to \] done clear
  View Solution play_arrow

• question_answer99)
  Which of the following used for the conversion of 2-hexyne into trans-2-hexane [IIT JEE (Screening) 2004]
  A)
  \[{{H}_{2}}/Pd/BaS{{O}_{4}}\] done clear
  B)
  \[{{H}_{2}},Pt{{O}_{2}}\] done clear
  C)
  \[NaB{{H}_{4}}\] done clear
  D)
  \[Li-N{{H}_{3}}/{{C}_{2}}{{H}_{5}}OH\] done clear
  View Solution play_arrow

• question_answer100)
  In which of the following, the bond length between hybridized carbon atom and other carbon atom is minimum [MH CET 2003]
  A)
  Propyne done clear
  B)
   Propene done clear
  C)
  Butane done clear
  D)
  Propane done clear
  View Solution play_arrow

• question_answer101)
  What happens when a mixture of acetylene an hydrogen is passed over heated Lindlar?s catalyst [Kerala PMT 2004; AIIMS 1987]
  A)
  Ethane and water are formed done clear
  B)
  Ethylene is formed done clear
  C)
  Acetylene and ethane are formed done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer102)
  In acetylene molecule, the two carbon atoms are  linked by [KCET 2004]
  A)
  One sigma bond and two pi bonds done clear
  B)
  Two sigma bonds and one pi bond done clear
  C)
  Three sigma bonds done clear
  D)
  Three pi bonds done clear
  View Solution play_arrow

• question_answer103)
  Which reacts with ammoniacal \[AgN{{O}_{3}}\] [Orissa JEE 2005]
  A)
  Propyne done clear
  B)
  2-butyne done clear
  C)
  1,3-butadiene done clear
  D)
  Pentene done clear
  View Solution play_arrow

• question_answer104)
  \[CH\equiv CH\underset{{{H}_{2}}S{{O}_{4}}}{\mathop{\xrightarrow{HgS{{O}_{4}}}}}\,\underset{{{H}_{2}}O}{\mathop{\xrightarrow{C{{H}_{3}}MgBr}}}\,\xrightarrow{P/B{{r}_{2}}}\] [DPMT 2005]
  A)
  \[C{{H}_{3}}CH(Br)C{{H}_{3}}\] done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br\] done clear
  C)
  \[C{{H}_{2}}=CH-Br\] done clear
  D)
  \[BrCH=CH-C{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer105)
  Carbide, which react with water to give propyne is [Kerala CET 2005]
  A)
  \[Ca{{C}_{2}}\] done clear
  B)
  \[SiC\] done clear
  C)
  \[M{{g}_{2}}{{C}_{3}}\] done clear
  D)
  \[A{{l}_{4}}{{C}_{3}}\] done clear
  E)
  \[B{{e}_{2}}C\] done clear
  View Solution play_arrow