Page 157 - Jurnal Pendidikan Tingkatan Enam 2019 - Jilid 3

JURNAL PENDIDIKAN TINGKATAN ENAM 2019 JILID 3

LAMPIRAN 2
LAMPIRAN 2

CONTOH SOALAN ESEI PENGENALPASTIAN FORMULA STRUKTUR
SEBATIAN-SEBATIAN ORGANIK

Question:

Bromination of ethylbenzene in the presence of ultraviolet light yields monobrominated
products, P and Q. P rotates plane-polarised light but Q does not. When P and Q are
refluxed separately with an aqueous solution of sodium hydroxide, R and S are formed
respectively. Determine the structural formulae of P, Q, R and S.

Instruction:
Please follow this instruction to answer the question.
First step, the students were required to form a table consisting observations and
deductions. All the observations given in the question must be splitted and were listed
separately in the table formed. The deduction for every observation must be written in
the same table. Once all the deductions were completed, the students were required
to analyse and relate all the deductions so that a reaction scheme can be sketched
from the information. Lastly, based on the analysis and reaction scheme, identify the
structural formulae of the compounds.

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