COMEDK 2024 Morning Shift | Alcohol, Phenols and Ethers Question 21 | Chemistry

Match the compounds given in column I with the corresponding most stable Carbocations formed by each, as given in Column II, when they undergo acidic dehydration in presence of Conc. $$\mathrm{H}_2 \mathrm{SO}_4$$.

No.	Column I	No.	Column II
A	2-Methylbutan-1-ol	P	$${(C{H_3})_2}\mathop C\limits^ + - CH{(C{H_3})_2}$$
B	Butan-2-ol	Q	$$C{H_3} - C{H_2} - C{H_2} - \mathop C\limits^ + {H_2}$$
C	3, 3-Dimethylbutan-2-ol	R	$${(C{H_3})_2}\mathop C\limits^ + - C{H_2} - C{H_3}$$
D	Butan-1-ol	S	$$C{H_3} - \mathop C\limits^ + H - C{H_2} - C{H_3}$$

$$ \mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{R} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{P} $$

$$ \mathrm{A}=\mathrm{Q} \quad \mathrm{B}=\mathrm{R} \quad \mathrm{C}=\mathrm{S} \quad \mathrm{D}=\mathrm{P} $$

$$ \mathrm{A}=\mathrm{R} \quad \mathrm{B}=\mathrm{S} \quad \mathrm{C}=\mathrm{P} \quad \mathrm{D}=\mathrm{Q} $$

$$ \mathrm{A}=\mathrm{Q} \quad \mathrm{B}=\mathrm{S} \quad \mathrm{C}=\mathrm{P} \quad \mathrm{D}=\mathrm{R} $$

COMEDK 2023 Morning Shift

MCQ (Single Correct Answer)

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COMEDK 2023 Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 25 English

COMEDK 2023 Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 25 English Option 1

COMEDK 2023 Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 25 English Option 2

COMEDK 2023 Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 25 English Option 3

COMEDK 2023 Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 25 English Option 4

COMEDK 2023 Evening Shift

MCQ (Single Correct Answer)

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Identify the starting compound from the following data:

$$\mathrm{C}_6 \mathrm{H}_{14} \mathrm{O}(\mathrm{X})$$ on reaction with $$\mathrm{HI}$$ yields a haloalkane (A) and an alcohol (B). Compound (A) on reaction with aqueous $$\mathrm{NaOH}$$ gives an alcohol (C). Compounds (B) and (C) on reaction with $$\mathrm{CrO}_3$$ in anhydrous medium yields Butanone and Ethanal respectively.

2-Methoxypentane

2-Ethoxybutane

Hexan-1-ol

Hexan-2-ol

COMEDK 2023 Evening Shift

MCQ (Single Correct Answer)

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Choose the incorrect statement.

$$\mathrm{m}$$ - Cresol is a weaker acid than Phenol.

Acidic nature of Phenol is due to -I effect of oxygen of the hydroxyl group.

Acetylation of Salicylic acid produces 2-Acetoxybenzoic acid.

Phenol on heating with Conc. $$\mathrm{H}_2 \mathrm{SO}_4$$ yields sulphanilic acid.

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