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OCR-B Chemistry Organic Synthesis and Chemical Tests - Statistics

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General Stats
  • This quiz has been taken 2 times
  • The average score is 18 of 94
Answer Stats
Hint Answer % Correct
alkene => alkane conditions: (1) ____ catalyst nickel
100%
or ____ catalyst under lab conditions platinum
100%
alkene => halogenoalkane: requires the halogen and ____ light UV/ultraviolet
100%
(2) ____ degrees C temperature 300
50%
(3) ____ atm pressure 5
50%
keep below ____ degrees C 5
50%
keep below ____ degrees C 55
50%
acyl chloride => ester: react with ____ at room temperature alcohol
50%
if ammonium is present, ____ will be liberated ammonia
50%
gives a ____ ring with an R group benzene
50%
gives a ____ ring with a COR group benzene
50%
ammonia gas turns damp red litmus paper ____ blue
50%
react ____ nitric and ____ sulfuric acid to form the NO2+ electrophile concentrated
50%
acyl chloride => primary amide: react with ____ at room temperature concentrated ammonia
50%
compound containing a relatively reactive benzene ring, usually phenol or phenylamine coupling agent
50%
CN group attached to the same carbon atom as an OH group cyanohydrin/hydroxynitrile
50%
solubility of silver halides in ammonia ____ down the group decreases
50%
and ____ alloy Devarda's
50%
Ba2+ flame test colour green
50%
primary alcohol => halogenoalkane: reflux with (1) sodium ____ halide
50%
alkene => halogenoalkane: react alkene with ____ hydrogen halide
50%
halogenoalkane => primary alcohol: reflux with sodium ____ hydroxide
50%
K+ flame test colour lilac
50%
carbonate ion test: add dilute acid and bubble through ____ limewater
50%
Pb2+ test: react with ____ potassium iodide
50%
test for hydroxide ions: turns ____ litmus paper blue red
50%
Tollen's reagent: warm in a test tube, positive result is ____ forms silver mirror
50%
test for ammonium ions: heat with ____ sodium hydroxide
50%
test for nitrate: heat with ____ sodium hydroxide
50%
aldehyde => primary alcohol: react with ____ sodium tetrahydridoborate
50%
bromine water decolorises in the presence of ____ unsaturation
50%
Na+ flame test colour yellow
50%
(2) ____ degrees C temperature 150
0%
primary alcohol => aldehyde: reflux with ____ acidified potassium dichromate
0%
aldehyde => carboxylic acid: reflux with ____ acidified potassium dichromate
0%
primary alcohol => alkene: (1) ____ catalyst alumina
0%
Friedl Crafts alkylation: reflux with RCl and ____ aluminium (III) chloride
0%
Friedl Crafts acylation: reflux with ROCl or (RCO)2O and ____ aluminium (III) chloride
0%
benzene => chlorobenzene: react with chlorine and ____ aluminium (III) chloride
0%
positive result: ____ gas liberated ammonia
0%
and ____ aqueous barium chloride
0%
(1) dissolve ____ aromatic amine
0%
aqueous NaOH + copper 2+ ions precipitate blue
0%
Cu2+ flame test colour blue green
0%
Fehling's test: warm with Fehling's A and B, positive result is blue solution to ____ brick red precipitate
0%
Li+ flame test colour bright red
0%
positive result is a ____ bright yellow precipitate
0%
halogenoalkane => amine: heat in a sealed tube with ____ concentrated ammonia
0%
benzene => benzenesulfonic acid: reflux with ____ concentrated H2SO4
0%
(2) ____ concentrated hydrochloric acid
0%
alkene => primary alcohol: react with water and ____ concentrated sulfuric acid
0%
(2) ____ concentrated sulfuric acid
0%
carboxylic acid => ester: react with alcohol in the presence of ____ concentrated sulfuric acid
0%
coupling reaction: diazonium compound reacts with a ____ coupling agent
0%
formation of a diazonium salt or ____ diazotisation
0%
nitrile => carboxylic acid: reflux with ____ and water dilute hydrochloric acid
0%
in ____ dilute hydrochloric acid
0%
aqueous NaOH + iron 2+ ions precipitate green
0%
aqueous NaOH + chromium 3+ ions precipitate green
0%
sulfate ion test: add dilute ____ hydrochloric acid
0%
benzene => bromobenzene: react with bromine and ____ iron (III) bromide
0%
phenol test: add neutral ____ iron (III) chloride
0%
aldehyde => cyanohydrin: react with HCN or more safely ____ KCN
0%
if present, limewater turns ____ milky
0%
ester => carboxylic acid: hydrolyse with ____ acid or alkali moderately concentrated
0%
benzene => nitrobenzene: ____ mixture forms first nitrating
0%
test for halide ions: react with ____ acid nitric
0%
CN group attached to a carbon atom nitrile
0%
unstable ____ forms and reacts with the NH2 group nitrous acid
0%
Mg2+ + excess sulfuric acid no change
0%
Ca2+ + ammonia solution no change
0%
Sr2+ + ammonia solution no change
0%
Ba2+ + excess sodium hydroxide no change
0%
Ba2+ + ammonia solution no change
0%
aqueous NaOH + iron 3+ ions precipitate orange-brown
0%
Ca2+ flame test colour orange red
0%
white precipitate for Cl-, cream for Br-, ____ for I- pale yellow
0%
acyl chloride => secondary amide: acylation with a ____ primary amine
0%
and ____ silver nitrate
0%
Ca2+ + excess sulfuric acid slight white precipitate
0%
Sr2+ + excess sodium hydroxide slight white precipitate
0%
halogenoalkane => nitrile: reflux with ____ in ethanol sodium cyanide
0%
Zn2+ test: white precipitate with ____ that dissolves in excess ____ sodium hydroxide
0%
(2) add cold ____ sodium nitrate (III)
0%
the electrophile here is the ____ ion which is SO2OH+ (formed by losing 1 OH group) sulfonium
0%
carboxylic acid => acyl chloride: reflux with ____ thionyl chloride
0%
nitrobenzene => phenylamine: reflux with (1) ____ tin
0%
positive result: turns from yellow to ____ violet
0%
Mg2+ + excess sodium hydroxide solution white precipitate
0%
Mg2+ + ammonia solution white precipitate
0%
Ca2+ + sodium hydroxide white precipitate
0%
Sr2+ + excess sulfuric acid white precipitate
0%
Ba2+ + excess sulfuric acid white precipitate
0%
positive result: ____ white precipitate
0%
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