Practice free Aldehyde ketones & carboxylic Acid (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Anhydrides are hydrolyzed to corresponding carboxylic acid(s) by reaction with:
The NCERT text states: 'Anhydrides on the other hand are hydrolysed to corresponding acid(s) with water.'
Which of the following is commonly used as a strong oxidizing agent for the preparation of carboxylic acids from primary alcohols?
The NCERT mentions: 'Primary alcohols are readily oxidised to carboxylic acids with common oxidising agents such as potassium permanganate ($KMnO_4$) in neutral, acidic or alkaline media or by potassium dichromate ($K_2Cr_2O_7$) and chromium trioxide ($CrO_3$) in acidic media (Jones reagent).'
Acid chlorides can be converted to carboxylic acids by:
The NCERT states: 'Acid chlorides when hydrolysed with water give carboxylic acids or more readily hydrolysed with aqueous base to give carboxylate ions which on acidification provide corresponding carboxylic acids.'
Which of the following accurately describes the conversion of cyclohexene to hexane-1,6-dioic acid?
The NCERT mentions: 'Suitably substituted alkenes are also oxidised to carboxylic acids with these oxidising reagents,' specifically referring to chromic acid or acidic/alkaline potassium permanganate for vigorous oxidation. Cyclohexene is a cyclic alkene, and vigorous oxidation would break the ring and oxidize the carbons to carboxyl groups, forming a dicarboxylic acid like hexane-1,6-dioic acid.
Which reagent is employed to stop the hydrolysis of nitriles at the amide stage under mild conditions?
The NCERT states: 'Nitriles are hydrolysed to amides and then to acids in the presence of $H^+$ or $OH^-$ as catalyst. Mild reaction conditions are used to stop the reaction at the amide stage.'
Which of the following describes the IUPAC nomenclature for open-chain aliphatic aldehydes?
According to the IUPAC nomenclature, the names of open-chain aliphatic aldehydes are derived from the names of the corresponding alkanes by replacing the ending –e with –al. (NCERT, p. 229)
How are the common names of ketones typically derived?
The common names of ketones are derived by naming two alkyl or aryl groups bonded to the carbonyl group. (NCERT, p. 229)
When numbering the carbon chain in an open-chain aliphatic aldehyde for IUPAC nomenclature, where does the numbering begin?
In case of aldehydes, the longest carbon chain is numbered starting from the carbon of the aldehyde group during IUPAC nomenclature. (NCERT, p. 229)
What is the accepted common name for the simplest aromatic aldehyde carrying an aldehyde group on a benzene ring, even by IUPAC?
The name of the simplest aromatic aldehyde carrying the aldehyde group on a benzene ring is benzenecarbaldehyde. However, the common name benzaldehyde is also accepted by IUPAC. (NCERT, p. 229)
What suffix is added when an aldehyde group is attached to a ring in IUPAC nomenclature?
When the aldehyde group is attached to a ring, the suffix carbaldehyde is added after the full name of the cycloalkane. (NCERT, p. 229)
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