Exam (elaborations)
A2 Organic Chemistry
- Course
- LCSW ASWB MASS
- Institution
- LCSW ASWB MASS
A2 Organic Chemistry
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A2 Organic ChemistryAmino acids can be located on a - ANS-Chromatogram using Ninhydrin and can be identified
through their Rf values.
An enzyme is known to be stereospecific. What does stereospecific mean? - ANS-The enzyme
only works on one enantiomer.
Another chamical test for the oxdiation of an aldehyde, except for tollens reagent. - ANS--
Fehling's solution.
- Brick-red precipitate formed.
- Cu ions are reduced from Cu2+ to Cu+.
Between A-T and G-C which is the strongest. - ANS-G-C
Bromoethane to ethylamine and state the reagents and conditions and draw the mechanism. -
ANS-
Chemical test for the oxidation of an aldehyde. - ANS-- Tollens reagent.
- Silver mirror formed.
- Ag ions are reduced to Ag+
Compare the stability of benzene with that of cyclohexa-1,3,5-triene. - ANS-- The expected
value for cyclohexa-1,3,5-triene is -360 KJ mol-1.
- Benzene is less exothermic than cyclohexa-1,3,5-triene which means it is more stable.
Draw 1,4-dimethylbenzene. - ANS-
Draw 3-methylpentan-2-one - ANS-
Draw a carboxylic acid. - ANS-
Draw a ketone. - ANS-
Draw a polynucleotide when 2 2-deoxyribose molecules react with each other and state this
type of polymer and state the type of linkage. - ANS-- Condensation
, - Phosphodiester bond
Draw a triglyceride. - ANS-
Draw an aldehyde. - ANS-
Draw an equation of methanal being reduced to form propanol. - ANS-HCHO + 2[H] → CH3OH
Draw bromobenzene. - ANS-
Draw ethanal. - ANS-
Draw ethanoic acid. - ANS-
Draw nitrobenzene. - ANS-
Draw phenol. - ANS-
Draw phenylamine. - ANS-
Draw the diagram when adenine is reacting with thymine and state the type of interaction
between these 2 molecules and state the number of hydrogen bonds formed. - ANS-- Hydrogen
bonding.
- 2 hydrogen bonds.
Draw the diagram when guanine is reacting with cytosine and state the type of interaction
between these 2 molecules. - ANS-- Hydrogen bonding.
- 3 hydrogen bonds.
Draw the displayed formula for tetramethylsilane (TMS). - ANS-
Draw the enzyme reacting with the substrate. - ANS-
Draw the mechanism for Friedel-crafts acylation and state the name of the compound that you
produce. - ANS-Phenylethanone
Draw the mechanism for the nitration of benzene. - ANS-
Draw the mechanism of propanal being reduced to form propanol and state the reagent that we
use within this reaction. - ANS-H2
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