Alcohols, Phenols & Ethers · JEE Main previous year questions

2023 9 questions

1. Q732023 · 11 Apr 2023 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: B

2. Q722023 · 10 Apr 2023 · Shift 1

   Suitable reaction condition for preparation of Methyl phenyl ether is

   1. A.$\text{Benzene},\text{MeBr}$
   2. B.${\text{PhO}}^{\ominus }{\text{Na}}^{\oplus },\text{MeBr}$
   3. C.$\text{Ph - Br},{\text{MeO}}^{\ominus }{\text{Na}}^{\oplus }$
   4. D.${\text{PhO}}^{\ominus }{\text{Na}}^{\oplus },\text{MeOH}$
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   Answer: B

3. Q682023 · 10 Apr 2023 · Shift 2

   Incorrect method of preparation for alcohols from the following is:

   1. A.Hydroboration-oxidation of alkene.
   2. B.Reaction of Ketone with $\text{RMgBr}$ followed by hydrolysis.
   3. C.Ozonolysis of alkene.
   4. D.Reaction of alkyl halide with aqueous $\text{NaOH}$.
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   Answer: C

4. Q872023 · 6 Apr 2023 · Shift 2· Numerical answer

   Among the following, the number of compounds which will give positive iodoform reaction is _________ (a) 1-Phenylbutan-2-one (b) 2-Methylbutan-2-ol (c) 3-Methylbutan-2-ol (d) 1-Phenylethanol (e) 3,3-dimethylbutan-2-one (f) 1-Phenylpropan-2-ol

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   Answer: 4

5. Q712023 · 1 Feb 2023 · Shift 1
   
   1. A.$\text{d}>\text{b}>\text{c}>\text{a}$
   2. B.$\text{b}>\text{d}>\text{c}>\text{a}$
   3. C.$\text{a}>\text{d}>\text{b}>\text{c}$
   4. D.$\text{b}>\text{a}>\text{d}>\text{c}$
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   Answer: B

6. Q682023 · 29 Jan 2023 · Shift 1

   Match List I with List II $$\begin{array}{llll}& \text{List I Reaction}& & \text{List II Reagents}\\ \text{(A)}& \text{Hofmann Degradation}& \text{(I)}& \text{Conc. KOH, }\Delta \\ \text{(B)}& \text{Clemmensen reduction}& \text{(II)}& \mathrm{CHC}{\mathrm{l}}_3,NaOH/{\mathrm{H}}_3{\mathrm{O}}^{\oplus }\\ \text{(C)}& \text{Cannizzaro reaction}& \text{(III)}& \mathrm{B}{\mathrm{r}}_2,\mathrm{NaOH}\\ \text{(D)}& \text{Reimer-Tiemann Reaction}& \text{(IV)}& \mathrm{Zn}-Hg/HCl\end{array}$$ Choose the correct answer from the options given below :

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

7. Q692023 · 29 Jan 2023 · Shift 1

   The increasing order of $\mathrm{p}{\mathrm{K}}_{\mathrm{a}}$ for the following phenols is (A) 2, 4 - Dinitrophenol (B) 4 - Nitrophenol (C) 2, 4, 5 - Trimethylphenol (D) Phenol (E) 3-Chlorophenol Choose the correct answer from the option given below :

   1. A.(A), (E), (B), (D), (C)
   2. B.(C), (E), (D), (B), (A)
   3. C.(C), (D), (E), (B), (A)
   4. D.(A), (B), (E), (D), (C)
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   Answer: D

8. Q642023 · 29 Jan 2023 · Shift 2

   A solution of $\mathrm{Cr}{\mathrm{O}}_5$ in amyl alcohol has a __________ colour.

   1. A.Yellow
   2. B.Orange-Red
   3. C.Green
   4. D.Blue
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   Answer: D

9. Q632023 · 25 Jan 2023 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: D