AQA A-Level Chemistry 3.3 Organic chemistry overview quiz quiz

A nickel catalyst

Concentrated sulfuric acid

Ultraviolet light

Low temperature only

The orange solution slowly turns to a deep green colour

A bright silver mirror forms on the inside of the test tube

Vigorous effervescence occurs as a colourless gas is given off

The solution turns from orange to colourless

Tollens reagent; an aldehyde gives a silver mirror

Bromine water; turns colourless

Sodium carbonate; fizzes

Acidified dichromate; stays orange for an aldehyde

An aldehyde, with no further oxidation taking place

A carboxylic acid

A ketone formed by oxidation at the carbon

An alkene produced by an elimination reaction

It contains no chiral centre and therefore none of its molecules can rotate light at all

It is simply far too dilute to rotate plane-polarised light at any concentration that is normally used

It contains equal amounts of two enantiomers whose rotations of plane-polarised light cancel

All of its molecules are achiral and so have no effect on plane-polarised light whatsoever

A neutral NO2 free radical

The negatively charged nitrate ion NO3-

An undissociated molecule of nitric acid HNO3

The nitronium ion NO2+

All six carbon-carbon bonds are the same length and its enthalpy of hydrogenation is less exothermic than predicted

It rapidly decolourises bromine water at room temperature without any catalyst, exactly as the reactive alkenes are observed to do

It has an unexpectedly very low boiling point compared with other hydrocarbons of a similar size

It readily reacts by electrophilic addition in the same way that a simple alkene is known to do

The phenyl group in phenylamine donates extra electron density onto the nitrogen, making its lone pair much more available

The alkyl group releases electron density to nitrogen, while in phenylamine the lone pair is delocalised into the ring

Ethylamine has no lone pair of electrons on its nitrogen atom and so cannot accept a proton at all

Phenylamine is in fact the stronger base because its lone pair is held more loosely than in ethylamine

Hydrogen chloride

Carbon dioxide

Water

Ammonia

Two hydrogens on the adjacent carbon atom

Four hydrogens on the adjacent carbon atom

One hydrogen on the adjacent carbon atom

Three

It is the reference set at a chemical shift of zero

It is the deuterated solvent used to dissolve the sample

It splits the peaks by the n+1 rule

It removes OH protons from the spectrum

4.0

0.25

0.40

2.5