Aldehydes and Ketones (uppersixth science chemistry mew)Version en ligne Test your knowledge on aldehydes and ketones in upper sixth chemistry! par YAKILI LMS 1 What is the functional group of aldehydes? a –C=O b –OH c –COOH d –CHO 2 Which of the following is a ketone? a Formaldehyde b Acetone c Butanoic acid d Ethanol 3 What is the general formula for aldehydes? a CnH2n+2 b CnH2nO c CnH2nO2 d CnH2n-2 4 Which reagent is commonly used to oxidize aldehydes? a Hydrochloric acid b Benedict's solution c Sodium borohydride d Grignard reagent 5 What is the primary use of ketones in industry? a Plastics b Fuels c Solvents d Dyes 6 Which compound is a common example of an aldehyde? a Acetone b Propylene glycol c Hexane d Benzaldehyde 7 What type of reaction do aldehydes undergo with alcohols? a Dehydration b Hydrolysis c Condensation d Combustion 8 Which property is characteristic of ketones? a Higher boiling points than aldehydes b Sweet odor c Lower solubility in water d More reactive than aldehydes 9 What is the simplest ketone? a Butanone b Propionaldehyde c Hexanone d Acetone 10 Which test can differentiate between aldehydes and ketones? a Tollens' test b Bromine test c Litmus test d Iodine test 11 What is the suffix used in the IUPAC naming of aldehydes? a -al b -ene c -yne d -one 12 Which of the following is the correct name for CH3CHO? a Ethanal b Propionaldehyde c Methanol d Butanal 13 How are aldehydes generally classified based on their carbon chain? a Secondary b Quaternary c Primary d Tertiary 14 What is the functional group present in aldehydes? a Hydroxyl group (OH) b Carbonyl group (C=O) c Amine group (NH2) d Carboxyl group (COOH) 15 Which aldehyde is commonly known as formaldehyde? a Propionaldehyde b Ethanal c Methanal d Butanal 16 What is the general formula for aldehydes? a CnH2n-2 b CnH2nO c CnH2nO2 d CnH2n+2 17 Which of the following is a characteristic property of aldehydes? a They are non-polar compounds. b They can undergo oxidation to form carboxylic acids. c They are always solid at room temperature. d They cannot form hydrogen bonds. 18 What is the simplest aldehyde? a Propionaldehyde b Methanal c Butanal d Ethanal 19 Which aldehyde has a four-carbon chain? a Ethanal b Propionaldehyde c Methanal d Butanal 20 What is the common use of formaldehyde? a Preservative in laboratories b Plastic production c Food flavoring d Fuel additive 21 What is the general formula for aldehydes? a CnH2nO b CnH2n-2 c CnH2n+2 d CnH2nO2 22 Which aldehyde has the lowest boiling point? a Butyraldehyde b Acetaldehyde c Propionaldehyde d Formaldehyde 23 Aldehydes typically have what kind of odor? a Fruity b Sweet c Pungent d Floral 24 What is the solubility of lower aldehydes in water? a Highly soluble b Moderately soluble c Slightly soluble d Insoluble 25 Which property increases with the length of the carbon chain in aldehydes? a Boiling point b Reactivity c Solubility d Density 26 What type of intermolecular forces are predominant in aldehydes? a London dispersion b Dipole-dipole interactions c Hydrogen bonding d Ionic bonds 27 Which aldehyde is commonly used as a preservative? a Benzaldehyde b Formaldehyde c Butyraldehyde d Acetaldehyde 28 What is the typical state of lower aldehydes at room temperature? a Plasma b Gaseous c Solid d Liquid 29 Which aldehyde is known for its fruity smell? a Propionaldehyde b Benzaldehyde c Acetaldehyde d Formaldehyde 30 What is the effect of branching on the boiling point of aldehydes? a Increases boiling point b Decreases boiling point c Increases solubility d No effect 31 What is a common method for preparing aldehydes? a Hydrolysis of esters b Dehydration of alcohols c Oxidation of primary alcohols d Reduction of ketones 32 Which reagent is typically used to convert alcohols to carbonyl compounds? a Lithium aluminum hydride b Chromic acid c Sodium borohydride d Hydrochloric acid 33 What is the result of the oxidation of secondary alcohols? a Aldehydes b Ketones c Carboxylic acids d Alkenes 34 Which reaction involves the addition of a Grignard reagent to a carbonyl compound? a Condensation b Nucleophilic addition c Electrophilic substitution d Elimination 35 What is a common method for synthesizing ketones? a Reduction of aldehydes b Oxidation of secondary alcohols c Dehydration of amines d Hydrolysis of nitriles 36 Which reaction can produce aldehydes from carboxylic acids? a Dehydration b Hydrolysis c Reduction with lithium aluminum hydride d Electrophilic addition 37 What is the main product of the ozonolysis of alkenes? a Alkanes b Carbonyl compounds c Alkynes d Alcohols 38 Which method is used to prepare carbonyl compounds from nitriles? a Substitution b Reduction c Hydrolysis d Dehydration 39 What type of carbonyl compound is formed by the hydrolysis of an acid chloride? a Ketone b Ester c Aldehyde d Carboxylic acid 40 Which of the following is a method to prepare aldehydes? a Esterification b Wurtz reaction c Friedel-Crafts acylation d Hydroformylation of alkenes 41 What type of reaction do carbonyl compounds typically undergo with nucleophiles? a Electrophilic substitution b Nucleophilic addition c Elimination reaction d Free radical reaction 42 Which nucleophile is commonly used in the reaction with aldehydes? a Hydroxide ion (OH-) b Chloride ion (Cl-) c Bromide ion (Br-) d Hydride ion (H-) 43 What is the product of the reaction between a carbonyl compound and a Grignard reagent? a Alkene b Alcohol c Ester d Carboxylic acid 44 Which carbonyl compound is more reactive towards nucleophiles? a Carboxylic acid b Amide c Ketone d Aldehyde 45 What is a common nucleophile that reacts with ketones? a Ammonia b Water c Alkoxide ion d Carbon dioxide 46 What is the role of the carbonyl carbon in nucleophilic addition? a Electrophile b Base c Leaving group d Nucleophile 47 What type of product is formed when a carbonyl compound reacts with water? a Hydrate b Alkane c Aldehyde d Ether 48 Which reagent is used to convert a carbonyl compound into an alcohol? a LiAlH4 b NaBH4 c KMnO4 d H2SO4 49 What is the effect of steric hindrance on the reactivity of carbonyl compounds? a Changes product type b No effect c Decreases reactivity d Increases reactivity 50 Which functional group is formed when a carbonyl compound reacts with an amine? a Imine b Aldehyde c Amide d Ester
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