The products formed, in the reaction of phenol with Br2 diss

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

591.

Identify A and B in the following reaction

CH3-CH3 B CH3COOH  A CH3CH2OH

  • A - HI + red P; B - LiAlH4

  • A - Ni/  ; B - LiAlH4

  • A - LiAlH4 ; B - HI + red P

  • A - Pd- BaSO4 ; B - Zn - HCl


592.

The correct match is:

Reactants Product
(A) C2H5Cl, most Ag2 (i) CH3CH2ONO
(B) C2H5Cl, aqueous ethanolic AgCN (ii) C2H4
(C) C2H5Cl, aqueous ethanolic AgNO2 (iii) CH3CH2OH
(D) C2H5Cl, ethanolic KOH (iv) CH3CH2NC
  (v) C2H6
  •  A-v, B-iii, C-iv, D-i

  • A-i, B-ii, C-iii, D-iv

  • A-iii, B-iv, C-i, D-ii

  • A-iv, B-i, C-ii, D-v


593.

The IUPAC name of the compound (CH3)2CH—CH=CHCHOH—CH3 is

  • 5-methyl-hex-3-en-2-ol

  • 2-methyl-hex-3-en-5-ol

  • 2-hydroxy-5-methyl-3-hexene

  • 5-hydroxy-2-methyl-3-hexene


594.

The conversion of O-acylated phenol in presence of AlCl3 to C-acylated phenol is an example for this type of organic reaction

  • addition reaction

  • substitution reaction

  • molecular rearrangement

  • elimination reaction


Advertisement
595.

Consider the following reaction-

C2H5Cl + AgCN EtOH/ H2O X (major)

Which one of the following statements is true for X ?

(I) It gives propionic acid on hydrolysis.

(II) It has an ester functional group.

(III) It has a nitrogen linked to ethyl carbon.

(IV) It has a cyanide group.

  • IV

  • III

  • II

  • I


596.

The order of reactivity of phenol (I), nitrobenzene (II) and benzene (III) towards nitration is

  • (III) > (I) > (II)

  • (II) > (III) > (I)

  • (I) > (III) > (II)

  • (I) > (II) > (III)


Advertisement

597.

The products formed, in the reaction of phenol with Br2 dissolved in CS2 at 0°C are

  • o-bromo, m-bromo and p-bromophenols

  • o-bromo and p-bromophenols

  • 2,4,6-tribromo and 2,3,6-tribromophenols

  • 2,4-dibromo and 2,6-dibromophenols


B.

o-bromo and p-bromophenols

Phenol when treated with Br2 in the presence of non-polar solvent CS2, it gives only o- and p-bromophenols instead of the tri-substituted products. This is because the supression of phenoxide ion in non-polar solvent. Thus, we get only mono-substituted products.


Advertisement
598.

The structure of PCC is

  • C6H5NHCrO2Cl

  • C6H5NHCrO2Cl

  • C5H5NHCrO2Cl

  • C5H5NHCrO3Cl


Advertisement
599.

Identify phenacetin from the following-


600.

C2H5OH + 4I2 + 3Na2CO3 → X + HCOONa + 5NaI + 3CO2 + 2H2O

In the above reaction, 'X' is

  • diodomethane

  • triodomethane

  • iodomethane

  • tetrariodomethane


Advertisement