Fundamental Principles of Organic Chemistry MCQs

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MCQ's with answers from chapter 7 Fundamental Principles of Organic Chemistry, chemistry book 1 for FSC pre engineering and pre medical for Board of Intermediate and Secondary education. Also For Entry Test Preparation for UET, NUST, PIEAS, GIKI, AIR, FAST, WAH University, UHS, other engineering Universities and Medical Colleges.

1.            The state of hybridization of carbon atom in
            methane is

                           (A) Sp3                           (B) Sp2          
                           (C) Sp                             (D) dsP2

2.         In t-butyl alcohol, the tertiary carbon is bonded   to

(A) Two hydrogen atoms
(B) Three hydrogen atoms
(C) One hydrogen atoms
(D) No hydrogen atoms

               3.         Which set of hybrid orbitals has planar   triangular shape

(A) Sp3                                (B) Sp
(C) Sp2                                (D) dsp2

               4.         The chemist who synthesized urea from ammonium cyanate was

(A) Berzelius                               (B) Kolbe
(C) Wholer                                  (D) Lavoisier

               5.         Linear shape is associated with which set of       hybrid orbitals ?

(A) Sp                              (B) Sp2
(C) Sp3                            (D) dsp2

               6.         A double bond consists of.

(A) Two sigma bond
(B) One sigma and one pi bond
(C) One sigma and two pi bond
(D) Two pi-bond

               7.         Ethers show the phenomenon of

(A) Position isomerism
(B) Functional group isomerism
(C) Metamerism
(D) Cis-trans isomerism.

                8.        Select from the following the one which is          alcohol.

(A) CH3 --------CH2--------OH
(B) CH3---------O-----------CH3
(C) CH3COOH
(D) CH3--------CH2--------Br

              9.         Early chemists recognized organic compounds
            distinct from inorganic compounds because of

 (A) The difference in their origin and
       properties
 (B) The similarities in their origin but
       difference in their propertied
 (C) Both of the above
 (D) None of the above

                10.       The vital force theory was rejected by

A) Jhon Dalton              B) Friedrick Wohler
C) Dmitri Mendeleev      D) None of the above

                11.       We have become dependent for our food
            medicines and clothing   to which compounds.

(A) Inorganic compounds
(B) Organic compounds
(C) Both of the above
(D) None of the above

                12.       Natural Gas is a

(A) Mixture of hydrocarbons
(B) Methane
(C) Both of the above
(D) Nonn of the above

                13.       In Pakistan the natural gas is used for.

(A) For power generation only
(B) In coment and fertilizer industries only
(C) As a fuel in general industries and for
     domestic purposes
(D) All of the above are truce

                14.       At what temperature coal is heated in the            observe of air for converting it into coke, coal
                           gas, and coal tar

(A) Temperature ranging from 500-1000oC
(B) Temperature ranging from 100-1000oC
(C) Temperature ranging from 300-2000oC
(D) Temperature ranging from 1000-3000oC

                 15.      Cracking of petroleum is taken place by

A) Thermal cracking       B) Catalytic cracking
C) Steam cracking         D) All of the above

                16.       The structure of alkynes can be explained by      yet another mode of hybridization called as

(A) Sp2 hybridization   
(B) Sp3 hybridization
(C) Sp5 hybridization   
(D) Sp hybridization

17.        Metamerism aries due to the.

(A) Equal distribution of carbon atoms
(B) Unequal distribution of carbon atoms
(C) Both of the above are true
(D) None of the above are true

               18.        Cis-trans isomerism is also called as

(A) Geometric Isomerism
(B) Position Isomerism
(C) Chain Isomerism
(D) Metamerism

               19.        Coal, petroleum and natural gas are important
            sources of.

(A) Organic compounds
(B) Inorganic compounds
(C) Both of the above
(D) None of the above

               20.        Organic compounds are classified into

(A) Acyclic and cyclic compound
(B) Acyclic & Heterocyclic
(C) Non-cyclic
(D) All of the above

21.        Rate of reactions of most organic compounds
            are___________

            a) Very slow                 
            b) Very fast
            c) Medium
            d) No regular character present

22.        Coal is produced after a long time decay of
            __________

            a) Animals                     b) Fossils
            c) Wood                       d) Ores

23.        Ether functional group can be represented
            as____________

            a) –OH                          b) R-CO-R
            c) R-O-R                       d) R-COOH

24.        2-propanol can show isomerism             as _______

            a) Metamerism             
            b) Functional group isomerism
            c) Geometric isomerism
            d) None of above

25.        The hydrocarbons which give smoke on             burning is called________

            a) Aliphatic                    b) Aromatic
            c) Carboxylic acid         d) Aldehydes


26.        In sp3 hybridization, the geometry of      molecules will be_________

            a) Square planar            b) Trigonal pyramidal
            c) Tetrahedral                d) All are possible

27.        Only sigma bonds are present in _______

            a) Propene                    b) Butanoic acid
            c) Butanal                     d) Ethoxy butane

28.        In alkyne, the hybridization is____________

            a) sp2                           b) sp
            c) sp                             d) All

29.        Octane no. of any fuel can be improved by        ______

            a) Pyrolysis                   b) Reforming
            c) Polymerization           d) Condensation

30.        The fuel having 40% n-heptane & 60% iso-octane will have octane number

a) 40                             b) 60
c) 80                             d) 90

31.        Which of them is heterocyclic organic compound?

a) Benzene                    b) Cresol
c) Naphthalene              d) Pyridine

32.        Which one is the mixture of 215 organic compounds?

a) Water gas                 b) Coal gas
c) Coal tar                     d) Crude coal gas

33.        Octane number is the percentage of

a)     n-pentane in a mixture
b)    n-butane in a mixture
c)     n-hexane in a mixture
d)    2, 2, 4 – trimethyl pentane in a mixture

34.        During the fractional distillation of petroleum, paraffin oil boils between the ranges

a) 25oC                          b) 40 – 180oC
c) 175 – 275oC               d) 220 – 350oC

35.        The octane number of gasoline may increased by adding

a) EDTA                        b) NaOH
c) AgNO3                                             d) PB(C2H5)4

36.        Which process increases the yield of gasoline from petroleum?
a) Cracking                    b) Polymerization
c) Reforming                 d) Sublimation

37.        Consider the reaction
            3C2H2  C6H6
            This is the example of

a) Pyrolysis                   b) Polymerization
c) Sublimation               d) Addition

38.        Which one is acyclic hydrocarbon?

a) C6H6                                                    b) C2H6
c) C6H12                          d) CH4

39.        Which type of isomerism is shown by the following compounds?
            CH3 – CH2 – CHO, CH3 – CO – CH3

a)     Chain isomerism
b)    Position isomerism
c)     Metamerism
d)    Functional group isomerism

40.        The type of isomerism found in 1 – butene and 2 – butane is

a) Position                    b) Chain
c) Functional group       d) Metamerism

41.        The members of which of these have similar methods of preparation and properties

a) Isomers                     b) Homologues
c) Polymers                  d) Monomers

42.        The maximum number of isomers for an alkene with molecular formula C4H8 is

a) 2                               b) 3
c) 4                               d) 5

43.        Which of the following is most stable ion?

a) CH3 – H2C+                b) (CH3)2 HC+
c) (CH3)3 C+                   d) All of these

44.        Which of the following is not an organic compound?

a) Urea                          b) Oxalic acid
c) Natural gas                d) Plaster of Paris

45.        Kerosine oil is a mixture of

a) Alkane                       b) Alkene
c) Alkynes                     d) All of these

46.        Which of the following compounds does not contain an OH group?

a) Alcohol                     b) Phenol
c) Aldehyde                  d) Carboxylic acid

47.        The chemical formula of chloride is

a) CH3OH                      b) CCl3OH
c) CCl3CHO                   d)   None of these

48.        Petroleum in the unrefined form is called ____

            a) Rock oil                    b) Coal gas
            c) Crude oil                   d) Both a & c

49.        Natural gas mainly consists of ________

            a) Methane                    b) Ethane
            c) Propane                    d) Butane

50.        _______ is a mixture of methane, ethane,
            propane and butane, used as a fuel and for
            making other organic chemicals.

            a) Refinery gas              b) Gasoline
            c) Kerosene oil              d) Gas oil

51.        A large number of organic compounds,
            especially the unsaturated ones, show a great
            tendency to unit. This process is termed as
            ______

            a) Pyrolysis                   b) Cracking
            c) Polymerization           d) None of these

52.        An isomer of ethanol is ________

            a) Dimethyl ether           b) Diethyl ether
            c) Ethylene glycol          d) Methanol

53.        When ethylene is heated under pressure, a
            transparent solid polymer, ________ is
            obtained.

            a) Polyethene                b) Ethane
            c) Methane                    d) None of these

54.        The quality of petroleum is determined by
            _______

            a) Decane number         b) Octane number
            c) Hexane number         d) None of these

55.        Two or more than two different compounds
            having the same molecular formula but
            different carbon chains or skeletons are said
            to be ______

            a) Chain isomers
            b) Position isomers
            c) Functional group isomers
            d) Metamers

56.        The kind of isomerism which depends upon
            the relative position of the functional group, or
            the position of double or tripe bond in case of
            unsaturated compounds is termed as
            ________

            a) Chain isomerism
            b) Position isomerism
            c) Functional group isomerism
            d) Metamerism

57.        Isomerism, which involves compounds having
            the same molecular formula, but different
            functional groups are called _______

            a) Chain isomerism
            b) Position isomerism
            c) Functional group isomerism
            d) Metamerism

58.        _______ is exhibited by compounds having
            the same functional group but different alkyl
            attached to the same multivalent atom.

            a) Chain isomerism
            b) Position isomerism
            c) Functional group isomerism
            d) Metamerism

59.        In cracking usually catalyst used is _______

            a) Pt                 b) Aluuminosilicate
            c) Ni                 d) Tetra ethyl lead

60.        In CCl4 molecule the four valencies of carbon
            atom are directing towards the corners of a
            _______

            a) Cube                         b) Hexagon
            c) Prism                        d) Tetrahedron

61.        The general formula (RCO)2O represents
            ________

            a) An ether                    b) Ketone
            c) An ester                    d) An acid hydride

62.        ______ has the longest bond length.

            a) C = C                        b) C ≡ C
            c) C – C                        d) All of these

63.        Compounds in which two alkyl groups are
            attached to an oxygen atom are called ______

            a) Alkanes                     b) Ethers
            c) Alcohols                   d) Isomer

64.        ________ is the common name of methanol.

            a) Formaldehyde           b) Acetaldehyde
            c) Propionaldehyde       d) None of these


65.        ______ is the common name of propanone.

            a) Acetone                    b) Ketone
            c) Diethyl ketone           d) None to these

66.        The properties of organic compounds are due
            to _______

            a) Covalent bonds         b) Functional groups
            c) Ionic bonds               d) None of these

67.        ______ of the following are isomers.

            a) Methyl alcohol and dimethyl ether
            b) Ethyl alchohol and dimethyl ether
            c) Acetone and Acetaldehyde
            d) Proponoic acid and propanone

68.        Which compound contains an sp hybridized C
            atom?

            a) CH3CN                      b) CH3CHO
            c) CH3NH2                     d) None

69.        Which of the following isomeric substances
            would be expected to have the lowest boiling
            point?

            a) Hexane                     b) 2 – methlypentane
            c) 2, 2 – dimethylbutane d) 3 – methlypentane

70.        The isomers must have the same ______

            a) Structural formula      b) Molecular formula
            c) Chemical formula       d) Physical properties

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