Chemistry N5 — Document
November 2022 — N5 — Chemistry
N5
2022
Nated Engineering
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Q1— Section header —
1.1Indicate whether the following statements are TRUE or FALSE by writing only 'True' or 'F alse next to the question number (1.1.1
1.1.5\in the ANSWER BOOK. Give a reason for the answer
1.1.1Propyne is classified as a saturated compound.
1.1.2Acyclic compounds are organic compounds in which the carbon atoms are arranged in ring structures.
1.1.3The carbon atom in methane has undergone a sp hybridi ation
1.1.4Acetone and propanal are isomers with molecular formula C
1.1.5Pentane has a higher boiling point than ethane. (5 2\ (10\
1.2Given below is the molecular structure of penicillin (an antibiotic\. Identify the indicated functional groups by writing only the functional group next to the letter (A E\
Q2— Section header —
2.1Consider the following compound: 4,4 diethyl methyloctane
2.1.1Draw the structure the alkane above. (3\
2.1.2Give the molecular formula of the alkane above. (1\
2.2Draw the structures of the respective alkyl A and B formed when the indicated hydrogen atom is removed from the given alkane.
2.2.2(2 2\ (4\
2.3An alkyl halide can be reduced to an alkane via the hydrolysis of a Grignard reagent.
2.3.1Using structural formula, indicate how 3 bromo 2,3 dimethylpentane forms a Grignard reagent.
2.3.2Write the hydrolysis reaction for the Grignard reagent in QUESTION
2.3.1(2\
Q2— Section header —
Q3— Section header —
3.1Draw the structure of 6 ethyl 2,3 dimethyl
3.2.1State Saytseff 's rule (3\
3.2.2Write down the equation for the elimination reaction of 2 butanol in sulfuric acid. Apply Saytseff 's rule and name the major and minor products. (4\
Q4— Section header —
4.1Give the structural formula of 1,1 dichloro methyl
4.2Write a reaction for the preparation of 1 hexyne, using 1 bromobutane and sodium acetylide as starting material. (4\
4.3Show by means of reaction equation, which alkyne is produced through the hydrolysis of calcium carbide. (Clearly name the alk yne in the reaction. (4\
Q5— Section header —
5.1Draw structures for the following aromatic compounds:
5.1.1bromochlorobenzene (2\
5.1.23,4 dinitrobenzoic acid (3\
5.2Draw and name the structure of the product formed during the following reaction: (2\
5.3Name the reaction in which benzene reacts with nitric acid in the presence of sulfuric acid to give nitrobenzene. (2\
5.4What is the hybridi ation of the carbon atom in a benzene ring? (1\ [10]10
Q6— Section header —
6.1The bulk of commercial ethanol is produced by the hydration of ethylene. In the process sulfuric acid is added to ethylene, and the resulting ethyl hydrogen sulphate is hydroly ed to ethanol. Write down the reaction equation for the
6.2Draw and name the structures of the alcohols formed in the following reactions:
6.2.1(3\
6.2.2(3\ [11]11
Q7— Section header —
7.1The simplest ketone has the molecular formula CH COCH . What is its trivial name? (1\
7.2Draw structures for the following compounds:
7.2.1Ethyl methyl ketone
7.2.2
7.3Give the name of the ketone/aldehyde formed during the oxidation of the following alcohols:
7.3.29
Q8— Section header —
8.1Name the following compounds and classify each of them as primary, secondary or tertiary amines:
8.1.3
8.2Write the reaction equation for the reaction between ammonia and chloropropane to form an alkylammonium salt, followed by the reaction of the salt with sodium hydroxide. (4\
8.3Why can amines be classified as Lewis base (2\ [12]12
Q9— Section header —
9.1Draw the structures of the following compounds:
9.1.1Propanoic acid
9.1.2methylpentanoic acid
9.1.3
9.2Name the ester formed by the reaction of methanol and formic acid. (2\ [8] TOTAL: 100 15040015 Copyright reserved8
Topics Identified
2
Organic ChemistryElectrochemistry
Mark Allocation
Total100 marks
Sections15 + 14 + 10 + 11 + 10 + 11 + 9 + 12 + 8 = 100 marks
Paper information
TitleDocument
SubjectChemistry
LevelN5
Document typeQuestion paper
Year2022
MonthNovember
Pages8
Downloads5
Examination context
Decade2020s
Years ago4y
SeasonSpring (SH)
Start dayTuesday
Exam periodNovember 2022
Days since exam1,439
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