Question:
Which among the following is NOT dicarboxylic acid?
Which among the following is NOT dicarboxylic acid?
Show Hint
A dicarboxylic acid has two -COOH groups.
Updated On: Apr 28, 2026
- Malonic acid
- Caproic acid
- Glutaric acid
- Succinic acid
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Concept:
A dicarboxylic acid is an organic acid containing two carboxyl groups: \[ (-COOH) \] General form: \[ HOOC-R-COOH \] If a compound has only one $-COOH$ group, it is a monocarboxylic acid.
Step 1: Check Malonic acid
Formula: \[ CH_2(COOH)_2 \] It contains two carboxyl groups. \[ \Rightarrow \text{Dicarboxylic acid} \]
Step 2: Check Caproic acid
Caproic acid = Hexanoic acid Formula: \[ CH_3(CH_2)_4COOH \] It contains only one carboxyl group. \[ \Rightarrow \text{Monocarboxylic acid} \]
Step 3: Check Glutaric acid
Formula: \[ HOOC(CH_2)_3COOH \] It contains two carboxyl groups. \[ \Rightarrow \text{Dicarboxylic acid} \]
Step 4: Check Succinic acid
Formula: \[ HOOC(CH_2)_2COOH \] It contains two carboxyl groups. \[ \Rightarrow \text{Dicarboxylic acid} \]
Step 5: Final Answer
The compound which is not a dicarboxylic acid is: \[ \boxed{\text{Caproic acid \] Quick Tip:
Names ending in \textit{-dioic acid} often represent dicarboxylic acids.
A dicarboxylic acid is an organic acid containing two carboxyl groups: \[ (-COOH) \] General form: \[ HOOC-R-COOH \] If a compound has only one $-COOH$ group, it is a monocarboxylic acid.
Step 1: Check Malonic acid
Formula: \[ CH_2(COOH)_2 \] It contains two carboxyl groups. \[ \Rightarrow \text{Dicarboxylic acid} \]
Step 2: Check Caproic acid
Caproic acid = Hexanoic acid Formula: \[ CH_3(CH_2)_4COOH \] It contains only one carboxyl group. \[ \Rightarrow \text{Monocarboxylic acid} \]
Step 3: Check Glutaric acid
Formula: \[ HOOC(CH_2)_3COOH \] It contains two carboxyl groups. \[ \Rightarrow \text{Dicarboxylic acid} \]
Step 4: Check Succinic acid
Formula: \[ HOOC(CH_2)_2COOH \] It contains two carboxyl groups. \[ \Rightarrow \text{Dicarboxylic acid} \]
Step 5: Final Answer
The compound which is not a dicarboxylic acid is: \[ \boxed{\text{Caproic acid \] Quick Tip:
Names ending in \textit{-dioic acid} often represent dicarboxylic acids.
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