431951
Descripción
Test por stevbarretto, actualizado hace más de 1 año
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Creado por stevbarretto
hace casi 11 años
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Pregunta 1
Pregunta
Aldehydes and Ketones contain which functional group?
Respuesta
-
-OH
-
Benzene ring
-
C=O
Pregunta 2
Pregunta
Of these compounds with comparable relative molecular mass, which has the higher boiling point?
Respuesta
-
Alcohols
-
Alkanes
-
Carbonyl compounds
Pregunta 3
Pregunta
Tick which answers are true
Respuesta
-
Shorter chain aldehydes and ketones mix completely with water
-
Carbonyl compounds become more soluble as chain length increases
-
Carbonyl compounds become less soluble as chain length increases
-
Methanal is gas at room temperature
-
Methanal is liquid at room temperature
-
Short chain aldehydes and ketones are pleasant smelling liquids
-
Short chain aldehydes and ketones are pleasant smelling gases
Pregunta 4
Pregunta
Which reactions commonly occur with carbonyl compounds?
Respuesta
-
Electrophilic addition
-
Nucleophilic substitution
-
Nucleophilic addition
-
Redox
-
Neutralisation
Pregunta 5
Pregunta
Reactions of Aldehydes and Ketones with Hydrogen Cyanide (:CN-) produce what?
Respuesta
-
Carboxylic acids
-
Amines
-
Amides
-
N-Substituted Amides
-
Hydroxynitriles
-
Esters
-
Alcohols
Pregunta 6
Pregunta
A nucleophilic reaction produces a racemic mixture when a nucleophile attacks which of these?
Respuesta
-
A symmetrical Ketone
-
An Aldehyde
-
An unsymmetrical Ketone
Pregunta 7
Pregunta
What does acidified potassium dichromate do to aldehydes?
Respuesta
-
Oxidise to ester
-
Reduce to ester
-
Oxidise to alcohol
-
Reduce to alcohol
-
Oxidise to carboxylic acid
-
Reduce to carboxylic acid
-
Nothing
Pregunta 8
Pregunta
What does acidified potassium dichromate do to ketones?
Respuesta
-
Oxidise to ester
-
Reduce to ester
-
Oxidise to carboxylic acid
-
Reduce to carboxylic acid
-
Oxidise to alcohol
-
Reduce to alcohol
-
Nothing
Pregunta 9
Pregunta
Colour of Fehlings solution?
Respuesta
-
Green
-
Orange
-
Red
-
Brown
-
Pink
-
Blue
Pregunta 10
Pregunta
When an aldehyde is warmed with Fehlings solution a precipitate is formed. What colour?
Respuesta
-
Red
-
Green
-
Blue
-
Orange
-
Yellow
-
Pink
-
Black
Pregunta 11
Pregunta
When an aldehyde is warmed with Tollens reagent __________ is formed
Respuesta
-
Metallic silver
-
Red precipitate
-
Blue precipitate
Pregunta 12
Pregunta
Reducing agents (e.g. NaBH4) can reduce aldehydes and ketones to ____________
Respuesta
-
Carboxylic acids
-
Esters
-
Alcohols
-
Alkanes
-
Alkenes
Pregunta 13
Pregunta
Reducing agent sodium tetrahydridoborate(III) generates which nucleophile?
Respuesta
-
-F
-
-OH
-
-H
-
-CH3
-
-NH2
Pregunta 14
Pregunta
Benzene ring with carboxylic acid group attached is called..?
Respuesta
-
Phenylcarboxylic acid
-
Carboxylbenzoic acid
-
Benzenecarboxylic acid
Pregunta 15
Pregunta
Carboxylic acids are completely soluble in water. (Up to C4 only)
Respuesta
- True
- False
Pregunta 16
Pregunta
Carboxylic acids have lower melting points than alkanes of similar relative molecular mass
Respuesta
- True
- False
Pregunta 17
Respuesta
-
Colour
-
Boiling point
-
Viscocity
-
Electronegativity
-
Amounts
-
Melting Points
Pregunta 18
Pregunta
Glacial ethanoic acid is...?
Respuesta
-
Cooler
-
Pure ethanoic acid
-
Ethanoic acid from glaciers
Pregunta 19
Pregunta
How to name esters?
Respuesta
-
Group attached to oxygen comes first followed by R-COO
-
R-COO comes first and the group attached to oxygen comes last
Pregunta 20
Pregunta
Which has pleasant fruity smells?
Respuesta
-
Long chain esters
-
Short chain esters
Pregunta 21
Pregunta
The H in R-COOH (carbox. acid) can be lost as H+ leaving [R-COO]- what is this ion called
Respuesta
-
Carboxyl ion
-
Carboxylate ion
-
Carboxilic ion
-
Carboxylic acid ion
Pregunta 22
Pregunta
How to distinguish between carboxylic acids and other organic compounds?
Respuesta
-
React with water
-
React with sodium hydrogencarbonate
-
React with potassium dichromate
Pregunta 23
Pregunta
Ionic salts formed from carboxylic acids donating protons are called? (e.g. Ethanoic Acid + Sodium Hydroxide -> *Sodium Ethanoate* + Water)
Respuesta
-
Carboxyls
-
Carboxylates
-
Carboxylic salts
-
Carboxyl salt
Pregunta 24
Pregunta
Esters are formed in which reaction?
Respuesta
-
Alcohol + Ketone
-
Alcohol + Aldehyde
-
Aldehyde + Ketone
-
Alcohol + Carboxylic Acid
-
Carboxylic Acid + Aldehyde
-
Carboxylic Acid + Ketone
-
Carboxylic Acid + Alkene
Pregunta 25
Pregunta
This reaction (sped up by a strong acid catalyst) forms............?
Respuesta
-
Non equilibrium mixture
-
An equilibrium mixture
Pregunta 26
Pregunta
_____(1)______ is attacked by water acting as a _______(2)______ in the hydrolysis of esters
Respuesta
-
R group
-
R' group
-
Carbonyl Oxygen
-
Carbonyl Carbon
-
Strong nucleophile
-
Weak nucleophile
-
Weak electrophile
-
Strong base
-
Weak base
-
Weak acid
Pregunta 27
Pregunta
Equilibrium mixture of the hydrolysis of esters contains which of these..?
Respuesta
-
Alcohol
-
Ester
-
Base
-
Acid
-
Water
-
CO2
Pregunta 28
Pregunta
Fats and oils can be hydrolysed by boiling with NaOH to produce?
Respuesta
-
Water
-
CO2
-
Glycerol
-
Sodium Salts
Pregunta 29
Pregunta
Salts formed from hydrolysis of fats and oils using NaOH are used in?
Respuesta
-
Soaps
-
Paint
-
Sun cream
Pregunta 30
Respuesta
-
Aryl
-
Methyl
-
Acyl
-
Carbonyl
Pregunta 31
Pregunta
Esters, Acid Chlorides and Acid Anhydrides are examples of?
Respuesta
-
Acyl derivatives
-
Acid derivatives
Pregunta 32
Pregunta
Acyl chlorides and acid anhydrides are bad acylating agents
Respuesta
- True
- False
Pregunta 33
Pregunta
Acid chlorides are more reactive than acid anhydrides
Respuesta
- True
- False
Pregunta 34
Pregunta
Acyl Chlorides and Acid Anhydrides react with the following nucleophiles but in which order of reactivity?
Respuesta
-
Primary Amine>Ammonia>Alcohol>Water
-
Water>Primary Amine>Alcohol>Ammonia
-
Ammonia>Primary Amine>Alcohol>Water
Pregunta 35
Pregunta
In these reactions between Acyl chlorides/Acid anhydrides and nucleophiles what type of reaction takes place?
Respuesta
-
Addition reaction
-
Elimination reaction
-
Electrophilic reaction
-
Neutralisation reaction
-
Addition-elimination reaction
-
Electrophilic-elimination reaction
Pregunta 36
Pregunta
In addition-elimination reactions: If the nucleophile is ammonia the product is an/a...?
Respuesta
-
N-substituted amide
-
Amide
-
Ester
-
Carboxylic Acid
Pregunta 37
Pregunta
In addition-elimination reactions: If the nucleophile is a primary amine the product is an/a...?
Respuesta
-
N-substiuted amide
-
Amide
-
Ester
-
Carboxylic Acid
Pregunta 38
Pregunta
In addition-elimination reactions: If the nucleophile is the -OH group of an alcohol the product is an/a...?
Respuesta
-
N-Substituted amide
-
Amide
-
Carboxylic acid
-
Ester
Pregunta 39
Pregunta
In addition-elimination reactions: If the nucleophile is water the product is an/a...?
Respuesta
-
N-substituted amide
-
Amide
-
Carboxylic Acid
-
Ester
Pregunta 40
Pregunta
Ethanoic anhydride as an acylating agent is cheaper than ethanoyl chloride.
Respuesta
- True
- False
Pregunta 41
Pregunta
Ethanoic anhydride as an acylating agent is more corrosive than ethanoyl chloride.
Respuesta
- True
- False
Pregunta 42
Pregunta
Ethanoic anhydride as an acylating agent reacts less readily with water than ethanoyl chloride.
Respuesta
- True
- False
Pregunta 43
Pregunta
Ethanoic anhydride as an acylating agent is safer than ethanoyl chloride due their by-products
Respuesta
- True
- False
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