JEE Questions for Chemistry Hydrocarbons Quiz 8 - MCQExams.com

Formation of alkanes by action of Zn on alkyl halides is called
  • Frankland reaction
  • Cannizzaro reaction
  • Wurtz reaction
  • Kolbe’s reaction
When an alkyl iodide (RI) is treated with Na in dry ether, a symmetrical alkane (R2) is obtained. The reaction is called
  • Griganrd reaction
  • Fischer–Tropsch reaction
  • Berguis reaction
  • Wurtz reaction
Which of the following is used as an antiknocking material?
  • T.E.L.
  • C2H5OH
  • Glyoxal
  • Freon
1–Chlorobutane, on reaction with alcoholic potash (KOH), gives
  • 1–Butene
  • 1–Butanol
  • 2–Butene
  • 2–Butanol
Heating a mixture of sodium benzoate or benzoic acid and soda-lime gives
  • Benzene
  • Methane
  • Sodium benzoate
  • Calcium benzoate
Wurtz reaction involves the interaction of alkyl halides in dry ether with
  • Sodium
  • Zinc
  • Copper
  • Platinum
Successive alkanes differ by
  • CH2
  • CH
  • CH3
  • C2H4
LPG contains
  • Methane
  • Ethane
  • Butane
  • None of the above
The reaction C12H26 → C6H12 + C6H14 represents
  • Substitution
  • Synthesis
  • Cracking
  • Polymerization
  • Addition
The highest boiling point is expected for
  • n-butane
  • n- pentane
  • iso-Pentane
  • neo - pentane
Benzene reacts with Cl2 in presence of FeCl3 to give
  • BHC
  • Chlorobenzene
  • Hexachlorocyclohexane
  • Benzyl chloride
Gasoline with an octane number of 80 is equivalent in knocking characteristics to a mixture of heptane and iso-octane of the following composition
  • 20% heptane + 80% iso-octane
  • 90% heptane + 10% iso-octane
  • 80% heptane + 20% iso-octane
  • 10% heptane + 90% iso-octane
The reactivity of compound Z with different halogens under appropriate conditions is given below.
Chemistry-Hydrocarbons-4798.png
  • the steric effect on the halogen
  • the steric effect of the tert-butyl group
  • the electronic effect of the phenolic group
  • All the above
The correct statement is
  • cyclohexadiene and cyclohexene cannot be isolated with ease during controlled hydrogenation of benzene
  • One mole each of benzene and hydrogen when reacted give 1⁄3 mole of cyclohexane and 2⁄3 mole unreacted hydrogen
  • Hydrogenation of benzene to cyclohexane is an endothermic process
  • It is easier to hydrogenate benzene when compared to cyclohexene

Chemistry-Hydrocarbons-4801.png

  • Chemistry-Hydrocarbons-4802.png
  • 2)
    Chemistry-Hydrocarbons-4803.png

  • Chemistry-Hydrocarbons-4804.png

  • Chemistry-Hydrocarbons-4805.png
Pick out the wrong statement.
  • Toluene shows resonance
  • 2)
    Chemistry-Hydrocarbons-4807.png
  • The hybrid state of carbon in carbonyl group is sp2
  • The hyperconjugative effect is known as no bond resonance
  • Dipole moment of vinyl chloride is less than that of methyl chloride
Two organic compounds A and B both containing only carbon and hydrogen, on quantitative analysis gave the same percentage composition by weight
Chemistry-Hydrocarbons-4809.png
  • C2H2 and C6H6
  • C6H6 and C2H2
  • C2H4 and C2H6
  • C2H2 and C2H6
Match the following Column I and Column II.
Chemistry-Hydrocarbons-4811.png
  • A = 4, B = 3, C = 2, D = 1
  • A = 3, B = 2, C = 1, D = 4
  • A = 2, B = 4, C = 5, D = 3
  • A = 5, B = 1, C = 4, D = 3

Chemistry-Hydrocarbons-4812.png

  • Chemistry-Hydrocarbons-4813.png
  • CH3COCH3
  • CH3CHO
  • CH3CH2CH2CHO
In the following sequence of reactions, the alkene affords the compound B
Chemistry-Hydrocarbons-4814.png
  • CH3CH2CHO
  • CH3COCH3
  • CH3CH2COCH3
  • CH3CHO

Chemistry-Hydrocarbons-4816.png

  • Chemistry-Hydrocarbons-4817.png
  • 2)
    Chemistry-Hydrocarbons-4818.png

  • Chemistry-Hydrocarbons-4819.png

  • Chemistry-Hydrocarbons-4820.png

  • Chemistry-Hydrocarbons-4821.png
The dihalogen derivative X of a hydrocarbon with three carbon atoms reacts with alcoholic KOH and produces another hydrocarbon which forms a red precipitate with ammoniacal Cu2 Cl2 . X gives an aldehyde on reaction with aqueous KOH. The compound X is
  • 1,3-dichloropropane
  • 1,2-dichloropropane
  • 2,2-dichloropropane
  • 1,1-dichloropropane
  • 1,3-dichloropropene
The major product P in the following reaction is
Chemistry-Hydrocarbons-4822.png

  • Chemistry-Hydrocarbons-4823.png
  • 2)
    Chemistry-Hydrocarbons-4824.png

  • Chemistry-Hydrocarbons-4825.png

  • Chemistry-Hydrocarbons-4826.png
Identify Z in the series,
Chemistry-Hydrocarbons-4827.png
  • C2H5I
  • C2H5OH
  • CHI3
  • CH3CHO
In the bromination of benzene which electrophilies attacks on ring ?
  • Br+
  • Br-
  • Br2
  • Br

Chemistry-Hydrocarbons-4828.png
  • Na
  • HCl in H2O
  • KOH in C2H5OH
  • Zn in alcohol
Which of the following is not a mixture of hydrocarbons?
  • Candle wax
  • Kerosene
  • Vegetable oil
  • Paraffin oil
The order of appearance of the following with rising temperature during the refining of crude oil is
  • kerosene oil, gasoline, diesel
  • diesel, gasoline, kerosene oil
  • gasoline, diesel, kerosene oil
  • gasoline, kerosene oil, diesel.
The reagent, used for the conversion, CH3CH2COOH → CH3CH2CH3
  • LiAIH4
  • Soda –lime
  • Red P and concentrated HI
  • Amalgamated zinc and concentrated HCl.
Indicate the expected structure of the organic product when ethyl magnesium bromide is treated with heavy water (D2O)

  • Chemistry-Hydrocarbons-4829.png
  • 2)
    Chemistry-Hydrocarbons-4830.png
  • Sodium benzoate

  • Chemistry-Hydrocarbons-4831.png
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