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11th Standard Chemistry Fundamentals of Organic Chemistry English Medium Free Online Test One Mark Questions 2020 - 2021

11th Standard

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Chemistry

Time : 00:20:00 Hrs
Total Marks : 20
    Answer all the questions
    20 x 1 = 20
  1. Select the molecule which has only one \(\pi\) bond.

    (a)

    CH3– CH = CH – CH3

    (b)

    CH3– CH = CH – CHO

    (c)

    CH3– CH = CH – COOH

    (d)

    All of these

  2. The general formula for alkadiene is

    (a)

    CnH2n

    (b)

    CnH2n-1

    (c)

    CnH2n-2

    (d)

    CnHn-2

  3. The IUPAC name of the compound CH– CH = CH – C ≡ CH is

    (a)

    Pent - 4 - yn-2-ene

    (b)

    Pent -3-en-l-yne

    (c)

    pent – 2– en – 4 – yne

    (d)

    Pent – 1 – yn –3 –ene

  4. The IUPAC name of the compound \({ H }_{ 3 }C-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } -CH=C{ \left( { CH }_{ 3 } \right) }_{ 2 }\) is

    (a)

    2,4,4 – Trimethylpent -2-ene

    (b)

    2,4,4 – Trimethylpent -3-ene

    (c)

    2,2,4 – Trimethylpent -3-ene

    (d)

    2,2,4 – Trimethylpent -2-ene

  5. The IUPAC name of the compound \({ CH }_{ 3 }-\underset { \overset { | }{ OH } }{ CH } -COOH\) is

    (a)

    2 – Hydroxypropionic acid

    (b)

    2 – Hydroxy Propanoic acid

    (c)

    Propan – 2– ol –1 – oic acid

    (d)

    1 – Carboxyethanol

  6. The structure of isobutyl group in an organic compound is

    (a)

    CH3 - CH2 - CH2 - CH2 -

    (b)

    \({ CH }_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } \)

    (c)

    \({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-\)

    (d)

    \({ CH }_{ 3 }-\underset { | }{ CH } -{ CH }_{ 2 }-{ CH }_{ 3 }\)

  7. Which of the following is optically active?

    (a)

    3 – Chloropentane

    (b)

    2 Chloro propane

    (c)

    Meso – tartaric acid

    (d)

    Glucose

  8. How many cyclic and acyclic isomers are possible for the molecular formula C3H6O?

    (a)

    4

    (b)

    5

    (c)

    9

    (d)

    10

  9.  are

    (a)

    resonating structure

    (b)

    tautomers

    (c)

    Optical isomers

    (d)

    Conformers

  10. The hybridisations of central and terminal carbon atoms in  are respectively.

    (a)

    sp and sp

    (b)

    sp2 and sp3

    (c)

    sp and sp2

    (d)

    sp2 and sp

  11. In which of the following compound has only one type of hybridised carbon atom?

    (a)

    (b)

    (c)

    (d)

    All of these

  12. Identify the IUPAC name of the compound.

    (a)

    2 - Ethyl- 1,1 - dimethylcyclopentane

    (b)

    1 - Ethyl - 2,2 - dimethylcyclopentane

    (c)

    1,1 - Dimethyl- 2- ethylcyclopentane

    (d)

    2,2 - Dimethyl - 1- ethylcyclopentane

  13. The IUPAC name ofthe compound

    (a)

    Cyclopentylethyne

    (b)

    Ethynyl cyclopentane

    (c)

    Cyclopentyl acetylene

    (d)

    Ethynyl pentane

  14. Which alkene would have only primary and tertiary carbon?

    (a)

    Pentane

    (b)

    2-Methylbrutane

    (c)

    2,2-Dimethyl propane

    (d)

    2,3-Dimethylbrutane

  15. \(\underset { \underset { OH }{ | } }{ { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }-CH_{ 2 }-{ CH }_{ 2 }-{ CH }_{ 3 } } \) and  \(\underset { \underset { OH }{ | } }{ { CH }_{ 3 }-{ CH }_{ 2 }-{ CH_{ 2 } }-CH-{ CH }_{ 3 } } \)  are 

    (a)

    Functional isomers

    (b)

    Position isomers

    (c)

    Chain isomers

    (d)

    These are not isomers

  16. Number of structural isomers possible in C3H6O are

    (a)

    9

    (b)

    6

    (c)

    5

    (d)

    3

  17. Compounds having boiling points widely apart 40k and above can be purified by________.

    (a)

    Crystallisation

    (b)

    Sublimating

    (c)

    Fractional distillation

    (d)

    Simple distillation

  18. When stationary phase is solid, then the compounds can be separated on the basis of

    (a)

    Adsorption

    (b)

    Partition

    (c)

    Both (a) & (b)

    (d)

    Neither (a) nor (b)

  19. Nitrobenzene and benzene can be separated by the method of

    (a)

    steam distillation

    (b)

    crystallization

    (c)

    fractional crystallization

    (d)

    chromatography

  20. What is the method involved in purification of chloroform and aniline?

    (a)

    Sublimation

    (b)

    Crystallization

    (c)

    Distillation

    (d)

    Chromatography

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