OCR-B Chemistry Organic Synthesis and Chemical Tests

Quiz by
paulhollywood
Rate:
Last updated: May 18, 2026
You have not attempted this quiz yet.
First submittedMay 18, 2026
Times taken2
Average score19.1%
Report this quizReport
30:00
Enter answer here
0
 / 94 guessed
The quiz is paused. You have remaining.
Scoring
You scored / = %
This beats or equals % of test takers also scored 100%
The average score is
Your high score is
Your fastest time is
Keep scrolling down for answers and more stats ...
Hint
Answer
alkene => alkane conditions: (1) ____ catalyst
nickel
(2) ____ degrees C temperature
150
(3) ____ atm pressure
5
or ____ catalyst under lab conditions
platinum
alkene => halogenoalkane: react alkene with ____
hydrogen halide
alkene => primary alcohol: react with water and ____
concentrated sulfuric acid
primary alcohol => alkene: (1) ____ catalyst
alumina
(2) ____ degrees C temperature
300
alkene => halogenoalkane: requires the halogen and ____ light
UV/ultraviolet
primary alcohol => halogenoalkane: reflux with (1) sodium ____
halide
(2) ____
concentrated sulfuric acid
halogenoalkane => primary alcohol: reflux with sodium ____
hydroxide
primary alcohol => aldehyde: reflux with ____
acidified potassium dichromate
aldehyde => primary alcohol: react with ____
sodium tetrahydridoborate
aldehyde => carboxylic acid: reflux with ____
acidified potassium dichromate
carboxylic acid => ester: react with alcohol in the presence of ____
concentrated sulfuric acid
ester => carboxylic acid: hydrolyse with ____ acid or alkali
moderately concentrated
carboxylic acid => acyl chloride: reflux with ____
thionyl chloride
acyl chloride => ester: react with ____ at room temperature
alcohol
halogenoalkane => nitrile: reflux with ____ in ethanol
sodium cyanide
halogenoalkane => amine: heat in a sealed tube with ____
concentrated ammonia
nitrile => carboxylic acid: reflux with ____ and water
dilute hydrochloric acid
CN group attached to a carbon atom
nitrile
CN group attached to the same carbon atom as an OH group
cyanohydrin/hydroxynitrile
acyl chloride => primary amide: react with ____ at room temperature
concentrated ammonia
acyl chloride => secondary amide: acylation with a ____
primary amine
Friedl Crafts alkylation: reflux with RCl and ____
aluminium (III) chloride
gives a ____ ring with an R group
benzene
Friedl Crafts acylation: reflux with ROCl or (RCO)2O and ____
aluminium (III) chloride
gives a ____ ring with a COR group
benzene
benzene => benzenesulfonic acid: reflux with ____
concentrated H2SO4
the electrophile here is the ____ ion which is SO2OH+ (formed by losing 1 OH group)
sulfonium
benzene => bromobenzene: react with bromine and ____
iron (III) bromide
benzene => chlorobenzene: react with chlorine and ____
aluminium (III) chloride
benzene => nitrobenzene: ____ mixture forms first
nitrating
react ____ nitric and ____ sulfuric acid to form the NO2+ electrophile
concentrated
keep below ____ degrees C
55
nitrobenzene => phenylamine: reflux with (1) ____
tin
(2) ____
concentrated hydrochloric acid
formation of a diazonium salt or ____
diazotisation
(1) dissolve ____
aromatic amine
in ____
dilute hydrochloric acid
(2) add cold ____
sodium nitrate (III)
unstable ____ forms and reacts with the NH2 group
nitrous acid
keep below ____ degrees C
5
coupling reaction: diazonium compound reacts with a ____
coupling agent
compound containing a relatively reactive benzene ring, usually phenol or phenylamine
coupling agent
aldehyde => cyanohydrin: react with HCN or more safely ____
KCN
Mg2+ + excess sodium hydroxide solution
white precipitate
Mg2+ + ammonia solution
white precipitate
Mg2+ + excess sulfuric acid
no change
Ca2+ + sodium hydroxide
white precipitate
Ca2+ + ammonia solution
no change
Ca2+ + excess sulfuric acid
slight white precipitate
Sr2+ + excess sodium hydroxide
slight white precipitate
Sr2+ + ammonia solution
no change
Sr2+ + excess sulfuric acid
white precipitate
Ba2+ + excess sodium hydroxide
no change
Ba2+ + ammonia solution
no change
Ba2+ + excess sulfuric acid
white precipitate
test for ammonium ions: heat with ____
sodium hydroxide
if ammonium is present, ____ will be liberated
ammonia
test for halide ions: react with ____ acid
nitric
and ____
silver nitrate
white precipitate for Cl-, cream for Br-, ____ for I-
pale yellow
solubility of silver halides in ammonia ____ down the group
decreases
test for hydroxide ions: turns ____ litmus paper blue
red
carbonate ion test: add dilute acid and bubble through ____
limewater
if present, limewater turns ____
milky
sulfate ion test: add dilute ____
hydrochloric acid
and ____
aqueous barium chloride
positive result: ____
white precipitate
aqueous NaOH + copper 2+ ions precipitate
blue
aqueous NaOH + iron 2+ ions precipitate
green
aqueous NaOH + iron 3+ ions precipitate
orange-brown
aqueous NaOH + chromium 3+ ions precipitate
green
test for nitrate: heat with ____
sodium hydroxide
and ____ alloy
Devarda's
positive result: ____ gas liberated
ammonia
Li+ flame test colour
bright red
Na+ flame test colour
yellow
K+ flame test colour
lilac
Ca2+ flame test colour
orange red
Ba2+ flame test colour
green
Cu2+ flame test colour
blue green
phenol test: add neutral ____
iron (III) chloride
positive result: turns from yellow to ____
violet
Pb2+ test: react with ____
potassium iodide
positive result is a ____
bright yellow precipitate
Zn2+ test: white precipitate with ____ that dissolves in excess ____
sodium hydroxide
bromine water decolorises in the presence of ____
unsaturation
Fehling's test: warm with Fehling's A and B, positive result is blue solution to ____
brick red precipitate
Tollen's reagent: warm in a test tube, positive result is ____ forms
silver mirror
ammonia gas turns damp red litmus paper ____
blue
Save Your Stats
Your Next Quiz
How many countries do you know? In this quiz, you've got 15:00 to name as many as you can. Go!
Can you name all the countries that have ever been members of OPEC, the Organization of Petroleum Exporting Countries?
Can you put all the countries of Asia on a map?
Drag the pin onto the correct country. Careful, though! Three wrong moves and the game ends.
Comments
No comments yet