Aldehydes, Ketones and Carboxylic Acids — Practice Quiz
ICSE · Class 12 · Chemistry
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Quick Quiz: Aldehydes, Ketones and Carboxylic Acids
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What is the functional group in aldehydes?
What is the IUPAC name of CH3COCH3?
Which reagent is used in Rosenmund reduction?
Aldehydes and ketones do not show hydrogen bonding between their molecules. This is because:
Sample Questions
What is the product of the reaction: Acetaldehyde + HCN →?
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CH3CH(OH)CN (lactonitrile)
HCN adds to acetaldehyde in nucleophilic addition to give CH3CH(OH)CN (lactonitrile or acetaldehyde cyanohydrin).
Aldehydes give a silver mirror with Tollens' reagent. This is because they are:
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Reducing agents
Aldehydes are oxidised to carboxylic acids by Tollens' reagent (ammoniacal AgNO3), reducing Ag+ to Ag (silver mirror). They act as reducing agents.
What is the product of aldol condensation of acetaldehyde (CH3CHO) with dilute NaOH?
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3-hydroxybutanal (aldol)
2 CH3CHO (dilute NaOH) → CH3CH(OH)CH2CHO (3-hydroxybutanal = aldol). This is the classic aldol condensation product.
Which of the following does NOT reduce Fehling's solution?
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Benzaldehyde (C6H5CHO)
Aromatic aldehydes (like benzaldehyde) do NOT reduce Fehling's or Benedict's solution. Only aliphatic aldehydes give red Cu2O precipitate.
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