Alcohols, Phenols & Ethers · JEE Main previous year questions

2024 10 questions

1. Q762024 · 8 Apr 2024 · Shift 2

   Match List I with List II $$\begin{array}{llll}& \text{LIST I}& & \text{LIST II}\\ & \text{(Test)}& & \text{(Identification)}\\ \text{A.}& \text{Baeyer’s test}& \text{I.}& \text{Phenol}\\ \text{B.}& \text{Ceric ammonium nitrate test}& \text{II.}& \text{Aldehyde}\\ \text{C.}& \text{Phthalein dye test}& \text{III.}& \text{Alcoholic-OH group}\\ \text{D.}& \text{Schiff’s test}& \text{IV.}& \text{Unsaturation}\end{array}$$ Choose the correct answer from the options given below :

   1. A.(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
   2. B.(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
   3. C.(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
   4. D.(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
   Show answer

   Answer: D

2. Q652024 · 4 Apr 2024 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: A

3. Q682024 · 1 Feb 2024 · Shift 2

   Match List - I with List - II. | List I (Reactants) | List II (Product) | | :--- | :--- | | (A) Phenol, $\mathrm{Zn}/\Delta$ | (I) Salicylaldehyde | | (B) Phenol, $\mathrm{CHC}{\mathrm{l}}_3$, $\mathrm{NaOH}$, $\mathrm{HCl}$ | (II) Salicylic acid | | (C) Phenol, $\mathrm{C}{\mathrm{O}}_2$, $\mathrm{NaOH}$, $\mathrm{HCl}$ | (III) Benzene | | (D) Phenol, Conc. $\mathrm{HN}{\mathrm{O}}_3$ | (IV) Picric acid | Choose the correct answer from the options given below :

   1. A.(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
   2. B.(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
   3. C.(A)-(IV), (B)-(II), (C)-(I), (D)-(III)
   4. D.(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
   Show answer

   Answer: B

4. Q782024 · 31 Jan 2024 · Shift 1

   Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: $\mathrm{p}{\mathrm{K}}_{\mathrm{a}}$ value of phenol is 10.0 while that of ethanol is 15.9 . Reason R: Ethanol is stronger acid than phenol. In the light of the above statements, choose the correct answer from the options given below:

   1. A.A is false but R is true.
   2. B.Both $A$ and $R$ are true but $R$ is NOT the correct explanation of $A$.
   3. C.Both $\mathrm{A}$ and $\mathrm{R}$ are true and $\mathrm{R}$ is the correct explanation of $\mathrm{A}$.
   4. D.$A$ is true but $R$ is false.
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   Answer: D

5. Q642024 · 30 Jan 2024 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: C

6. Q782024 · 29 Jan 2024 · Shift 2

   Match List I with List II | | List - I (Compound) | | List - II ($\mathrm{p}{\mathrm{K}}_{\mathrm{a}}$ value) | |---|---|---|---| | (A) | Ethanol | (I) | 10.0 | | (B) | Phenol | (II) | 15.9 | | (C) | m-Nitrophenol | (III) | 7.1 | | (D) | p-Nitrophenol | (IV) | 8.3 | Choose the correct answer from the options given below:

   1. A.A-I, B-II, C-III, D-IV
   2. B.A-IV, B-I, C-II, D-III
   3. C.A-II, B-I, C-IV, D-III
   4. D.A-III, B-IV, C-I, D-II
   Show answer

   Answer: C

7. Q612024 · 27 Jan 2024 · Shift 1

   Two nucleotides are joined together by a linkage known as :

   1. A.Phosphodiester linkage
   2. B.Glycosidic linkage
   3. C.Disulphide linkage
   4. D.Peptide linkage
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   Answer: A

8. Q712024 · 27 Jan 2024 · Shift 1

   Given below are two statements : Statement (I) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement (II) : Ethanol will give immediate turbidity with Lucas reagent. In the light of the above statements, choose the correct answer from the options given below :

   1. A.Statement I is true but Statement II is false
   2. B.Both Statement I and Statement II are true
   3. C.Both Statement I and Statement II are false
   4. D.Statement I is false but Statement II is true
   Show answer

   Answer: A

9. Q722024 · 27 Jan 2024 · Shift 1
   
   1. A.(A) < (D) < (C) < (B) < (E)
   2. B.(C) < (A) < (D) < (B) < (E)
   3. C.(C) < (D) < (B) < (A) < (E)
   4. D.(A) < (C) < (D) < (B) < (E)
   Show answer

   Answer: D

10. Q692024 · 27 Jan 2024 · Shift 2

    Phenolic group can be identified by a positive:

    1. A.Tollen's test
    2. B.Phthalein dye test
    3. C.Carbylamine test
    4. D.Lucas test
    Show answer

    Answer: B