New ! Chemistry MCQ Practise Tests



Hydroxy Compounds and Ethers 1 Mark Book Back Question Paper With Answer Key

12th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Chemistry

Time : 00:20:00 Hrs
Total Marks : 20

    Multiple Choice Question

    20 x 1 = 20
  1. An alcohol (x) gives blue colour in victormayer’s test and 3.7g of X when treated with metallic sodium liberates 560 mL of hydrogen at 273 K and 1 atm pressure what will be the possible structure of X?

    (a)

    CH3 CH (OH) CH2CH3

    (b)

    CH3 – CH (OH) – CH3

    (c)

    CH3 – C (OH) – (CH3)2

    (d)

    CH3- CH2 –CH (OH) – CH2 – CH3

  2. Which of the following compounds on reaction with methyl magnesium bromide will give tertiary alcohol.

    (a)

    benzaldehyde

    (b)

    propanoic acid

    (c)

    methyl propanoate

    (d)

    acetaldehyde

  3. The X is _______.

    (a)

    (b)

    (c)

    (d)

    None of these

  4. In the reaction sequence, Ethane \(\overset { HOCl }{ \longrightarrow } A\overset { x }{ \longrightarrow } \) ethan -1, 2 - diol. A and X respectively are ________.

    (a)

    Chloroethane and NaOH

    (b)

    ethanol and H2SO4

    (c)

    2 – chloroethan -1-ol and NaHCO3

    (d)

    ethanol and H2O

  5. Which one of the following is the strongest acid.

    (a)

    2 - nitrophenol

    (b)

    4 – chlorophenol

    (c)

    4– nitrophenol

    (d)

    3 – nitrophenol

  6. on treatment with Con H2SO4, predominately gives______.

    (a)

    (b)

    (c)

    (d)

  7. Carbolic acid is _____.

    (a)

    Phenol

    (b)

    Picri cacid

    (c)

    benzoic acid

    (d)

    phenylacetic acid

  8. Which one of the following will react with phenol to give salicyladehyde after hydrolysis.

    (a)

    Dichlo methane

    (b)

    trichloroethane

    (c)

    trichloro methane

    (d)

    CO2

  9. (CH3)3-C-CH(OH) CH3 \(\overset { con{ H }_{ 2 }{ SO }_{ 4 } }{ \longrightarrow } \)X (major product)

    (a)

    (CH3)3 CCH = CH2

    (b)

    (CH3)2C = C (CH3)2

    (c)

    CH2= C(CH3)CH2-CH2- CH3

    (d)

    CH2= C (CH3) - CH2- CH2- CH3

  10. The correct IUPAC name of the compound

    (a)

    4 – chloro – 2,3 – dimethyl pentan – 1-ol

    (b)

    2,3 – dimethyl – 4- chloropentan -1-ol

    (c)

    2,3,4 – trimethyl – 4- chlorobutan -1-ol

    (d)

    4– chloro – 2,3,4 – trimethyl pentan – 1-ol

  11. In the reaction Ethanol \(\overset { { PCl }_{ 5 } }{ \longrightarrow } X\overset { alc.KOH }{ \longrightarrow } Y\overset { { H }_{ 2 }{ SO }_{ 4 }/{ H }_{ 2 }O }{ \underset { 298k }{ \longrightarrow } } Z.\) The ‘Z’ is ______.

    (a)

    ethane

    (b)

    ethoxyethane

    (c)

    ethylbisulphite

    (d)

    ethanol

  12. The reaction

    Can be classified as ______.

    (a)

    dehydration

    (b)

    Williams on alcoholsynthesis

    (c)

    Williamson ether synthesis

    (d)

    dehydrogenation of alcohol

  13. HO CH2 CH2 – OH on heating with periodic acid gives  ______.

    (a)

    methanoic acid

    (b)

    Glyoxal

    (c)

    methanol

    (d)

    CO2

  14. Which of the following compound can be used as antifreeze in automobile rediators?

    (a)

    methanol

    (b)

    ethanol

    (c)

    Neopentyl alcohol

    (d)

    ethan -1, 2-diol

  15. The reactions
     is an example of  ______.

    (a)

    Wurtz reaction

    (b)

    cyclic reaction

    (c)

    Williamson reaction

    (d)

    Kolbe reactions

  16. One mole of an organic compound (A) with the formula C3H8O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is  ______.

    (a)

    propan – 2-ol

    (b)

    propan -1-ol

    (c)

    ethoxy ethane

    (d)

    methoxy ehane

  17. Among the following ethers which one will produce methyl alcohol on treatment with hot HI?

    (a)

    (H3C)3C-O-CH3

    (b)

    (CH3-)2-CH-CH2-O-CH3

    (c)

    CH3-(CH2)3-O-CH3

    (d)

    CH3-CH2-\(\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } \)-O-CH3

  18. Williamson synthesis of preparing dimethyl ether is a / an  ______.

    (a)

    SN1 reactions

    (b)

    SN2 reaction

    (c)

    electrophilic addition

    (d)

    electrophilic substitution

  19. On reacting with neutral ferric chloride, phenol gives  ______.

    (a)

    red colour

    (b)

    violet colour

    (c)

    dark green colour

    (d)

    no colouration.

  20. Isoprophylbenzene on air oxidation in the presence of dilute acid gives ______.

    (a)

    C6H5COOH

    (b)

    C6H5COCH3

    (c)

    C6H5COC6H5

    (d)

    C6H5- OH

*****************************************

Reviews & Comments about 12th Standard Chemistry English Medium - Hydroxy Compounds and Ethers 1 Mark Book Back Question Paper and Answer Key 2022 - 2023

Write your Comment