JAMB: PRACTICE QUESTIONS (ORGANIC CHEMISTRY)

As promised here we are Organic Chemistry questions and i guess i have guys that are good in organic take your time an answer this questions to test your self to know well you have prepared, as i clearly stated in my post on Inorganic Chemistry this questions are only meant for our readers to test them selves be for going tor the main exam and not the questions you will see on the day of JAMB.
Feel free to comment in case you have any thing at all to comment, if you have not gone through our questions in Inorganic part of Chemistry and you wish to do so Click here


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1. An example of oxidation-reduction enzyme is

   (a) amylase
   (b) protease
   (c) lipase
   (d) dehydrogenase

2. Which of the following is a primary amine?

    (a) (CH3)2NH
    (B) (CH3)3N
    (c) CH3NH2
    (d) CH3CONH2

3. The petroleum fraction that is used in heating furnaces in industries is
    (a) gasoline
    (b) diesel oil
    (c) kerosene
    (d) lubricating oil

4. A hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula.

    (a) C3H4
    (b) C3H3
    (c) C3H8
    (d) C2H6

5. The number of isomers that can be obtained from C4H10 is
    (a) 2
    (b) 3
    (c) 1
    (d) 4
6. The ability of carbon to form long chains is referred to as

    (a) alkylation
    (b) catenation
    (c) carbonation
    (d) sentence

7. The constituent of baking powder that makes the dough to rise is

    (a) NaCl
    (b) Na2CO3
    (c) NaOH
    (d) NaHCO3

8. Two organic compound K and L were treated  with a few drops of Fehling's solution respectively. K formed a brick-red precipitate while L remain unaffected. The compound K is an

    (a) alkanol
    (b) alkanal
    (c) alkanone
    (d) alkane

9. CH3COOH + C2H5OH ===== CH3COOC2H5 +H2O (conc.H2SO4 was used)
    (a) Neutralization
    (b) Esterification
    (c) sentence
    (d) saponification

10. An organic compound has an empirical formula CH2O and vapour density of 45. what is its                 molecular formula? [C=12, H=1, O=16]

(a) C3H7OH
(b) C2H4O2
(c) C2H5OH
(d) C3H6O3

11. The process of converting linear alkanes to branched chain and cyclic hydrocarbons by heating in       the presence of a catalyst to improve the quality of petrol is referred to as

(a) cracking
(b) refining
(c) reforming
(d) blending
12. The general formula of haloalkanes where X represents the halide is

(a) CnH2n X
(b) CnH2n+2 X
(c) CnH2n-1 X
(d) CnH2n+1 X

13.The alkanol obtained from the production of soap is

(a) ethanol
(b) glycerol
(c) methanol
(d) propanol
14. The process of converting starch to ethanol is

(a) oxidation
(b)sentence
(c)fermentation
(d)distillation

15. The polymer used in making car rear lights is

(a) sentence
(b) polystyrene
(c) polyacrylonitrile
(d) bakelite

16. polystyrene is widely used as packaging materials for fragile object during transportation because      of its

(a) low density
(b) lightness
(c) high compressibility
(d)high density
17. Geometric isomerism can exist in

(a)3-methyl but-1-ene
(b) hexane
(c) prop-1-ene
(d)hex-3-ene

18. The isomers of C3H8O are

(a) 1-propanol and 1-propanal
(b) 2-propanol and 2-propanone
(c) 1-propanol and 2-propanol
(d) 2-propanol and 1-propanal

19. The alkyne that will give a white precipitate with silver trioxonitrate(V) is

(a)CH3CH2CH2CH2CCH
(b) CH3CH2CH2CCCH2CH3
(c)CH3CCCH2CH2CH3
(d) CH3CH2CCCH2CH3

20. A compound contains 40%C, 6.7%H and 53.3%O. If the molecular mass of the compound is 180,      its molecular formula is

(a) C6H6O3
(b) C6H12O6
(c) CH2O
(d) C3H6O3

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