Chapter 8 Aliphatic Hydrocarbons

2nd year Chemistry Aliphatic Hydrocarbons MCQs

1.                  Mercapto group is present in

(a)                       Ether       (b) Thiol         (c) Ester (d)   Acid amide 

2.                  Which one of the following solvents is unlikely to dissolve an organic compound?

(a)                       Water      (b) Benzene  (c) Chloroform       (d)   Ether

3.                  Cyano group is present in 

(a)                       Alkane nitriles        (b) Nitro compounds 

(c)   Thiol compounds (d)  None of them

4.                  Cyclohexane is an example of 

(a)                       Saturated hydrocarbons        

(b)                       Unsaturated hydrocarbons

(c)                       Alicyclic hydrocarbons          (d) Aromatic hydrocarbons 26.   Acetic acid derives its name from

               (a) Honey                (b) Vinegar             (c) Water                (d) Milk

27.                  In ________ reduction a ketone is reduced to an alkane using Zinc amalgam and hydrochloric acid 

(a)    Clemmensen (b) Wolf kishrer   (c)     Kolbe   (d)  None of them

28.                  ____________ decomposed on treatment with water or dilute acid to give alkanes.

(a)    Alcohol             (b) Alkene              (c)  Ketones     

    (d)  Grignard reagent

29.                  Addition of hydrogen halide over an unsymmetrical alkene is governed by 

(a)    Einstein’s rule (b) Barbara’a Rule         (c)   Markownikov’s rule    (d) None of them

30.                  Ethyne on oxidation with strong alkaline KMnO₄ gives

(a)    Glycol       (b) Glycerols  (c) Glyoxal      

(d)  None of them

 

31.                  Ethyne contain ___________     - bonds 

(a)    One          (b) Two          (c) Three                        (d)   Four

32.                  The correct order of reactivity of halogens with alkanes is 

            (a)  I₂ > Br₂ > Cl₂ > F₂                         (b) I₂ > Cl₂ > F₂ > Br₂

            (c) F₂ > Cl₂ > I₂ > Br₂                   (d) F₂ > Cl₂ > Br₂ > I₂

33.                  Which product is not formed during the electrolysis of potassium  maleate.

            (a)       KOH        (b)  Ethyne             (c)  Ethene             (d) H₂

34.                  When sodium acetate is heated with soda lime, the product is 

            (a) C₃H₈              (b) C₂H₆                  (c) CH₄             

            (d) None of these 

35.                  1-butyne and 2-butyne can be distinguished using 

            (a)  Alkaline KMnO₄           (b) Br₂ water  

            (c)  Ammonical AgNO₃     (d)  None of these 

36.                  Ozonolysis of C₂H₄ forms

            (a) Glyoxal                         (b)  Formic acid      

            (c) Acetone                        (d)  Methanal 

37.                  The number of acidic hydrogen in propyne is 

            (a) 1            (b)  2                        (c) 3                       (d) 4

38.                  A carbonium ion is                    hybridized 

            (a) Sp²        (b) Sp                      (c) Sp³                              (d) dsp²

39.                  Butene can have 

            (a) Two position isomers          (b) Cis-trans isomers 

            (c) Both a and b                 (d) None of these 

40.                  The most important fraction of petroleum is  

            (a) Kerosene oil                 (b)  Diesel                

            (c) Gasoline                       (d)  Ligroin