Carboxylic Acids And Its Derivatives - Organic Chemistry - Chemistry Previous Year Questions

Why, ketones and carboxylic acids have higher boiling point as compared to aldehydes?

Which one of the following correctly represents the decreasing order of acidic nature of the given carboxylic acids:

[A] 2-Hydroxybenzoic acid

[B] Benzoic acid

[C] 3-Hydroxybenzoic acid

[D] 4- Hydroxybenzoic acid

In a set of reactions, bromoethane yielded a final product 'S'.

The compound 'S' should be

Among the following compounds, the most acidic is :

4-methyl benzamide (A) on reaction with ethanolic solution of \(\mathrm{KOH}\) and bromine gives another compound (B). The compound (B) on treatment with benzoyl chloride gives compound (C). Identify the correct structure of compound (C) from the following.

Identify the final product formed when Benzamide undergoes the following reactions:

Identify the final product \([\mathrm{D}]\) formed when Benzyl alcohol undergoes the following series of reactions

$$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{OH}+\mathrm{SOCl}_2 \rightarrow[\mathrm{A}]+\mathrm{KCN} \rightarrow[\mathrm{B}]+\mathrm{H}_3 \mathrm{O}^{+} \text {(partial hydrolysis) } \rightarrow[\mathrm{C}]+\mathrm{H}_3 \mathrm{O}^{+} \text {(complete hydrolysis) } \rightarrow[\mathrm{D}]$$

A sweet smelling organic compound \([\mathrm{A}]\left(\mathrm{C}_9 \mathrm{H}_{10} \mathrm{O}_2\right)\) undergoes acid hydrolysis to form an acid [B].
Compound [B] further reacts with Ammonia followed by heating to yield [C].
Compound \([\mathrm{C}]\) when reacted with \(\mathrm{Br}_2\) in caustic potash gave compound \([\mathrm{D}]\left(\mathrm{C}_6 \mathrm{H} 7 \mathrm{~N}\right)\) which gives a white precipitate with aqueous \(\mathrm{Br}_2\).
Identify compounds \([\mathrm{A}]\) & \([\mathrm{D}]\)

Identify the product [D] formed when Reactant [A] \((M M 78 \mathrm{~g} / \mathrm{mol})\) undergoes the series of reactions shown

Identify X and Y formed in the following two reactions.

(i) Decan-1-ol $\xrightarrow{\text { Jones reagent }} \mathrm{X}$

(ii). Sodium salt of $\mathrm{X} \xrightarrow{\mathrm{NaOH} / \mathrm{CaO}, \Delta} \mathrm{Y}$

Which of the following compounds would not be expected to decarboxylate when heated?

Two statements, One Assertion [ A ] and the other Reason [ R ] are given. Identify the correct option

Assertion $[A]$ : The decreasing order of the acidic character of the following is $B>D>A>C$

Reason $[\mathbf{R}]$ : Fluorine has larger -I effect than Cl and Br .

Two statements, one Assertion (A) and the other Reason (R) are given. Choose the correct option.

Assertion: 2-aminoethanoic acid and p-aminobenzene sulphonic acid can exist as Zwitter ions while p-aminobenzoic acid cannot.

Reason: When the acid group is a relatively strong proton donor and the $-\mathrm{NH}_2$ group is sufficiently basic it can accept a $\mathrm{H}^{+}$ion from the acid group to form the dipolar ion.