Page 171 - MODUL KIMIA A+XPLOSIVE SPM (LATEST)

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SPM Chemistry A xplosive Module (Chemistry A Ticket For “U”) ANSWERS

PAPER 2
SECTION A
NO MARK SCHEME MARKS
1. (a) (i) Molecules 1
(ii) Covalent bond 1
(iii) Chlorine atom share one pair of electron with another chlorine atom to 1
achieve stable octet electron arrangement.
(b) (i)

Compound dissolves in

water

Compound does not
dissolve in water
3
P1 – correct pair of atom
P2 – correct diagram of electron-nucleus shown, number of shells fill with
electron, ratio of atom for YCl
P3 – correct diagram of electron-nucleus shown, number of shells fill with

electron, ratio of atom for XCl 4
(ii) P1 – Melting point & boiling point for compound dissolves in water/ YCl
is higher than compound that does not dissolve in water/ XCl 4
Takat lebur & takat didih bagi sebatian larut dalam air / YCl lebih tinggi

daripada sebatian yang tidak larut dalam air / XCl 4

P2 – Molecule in XCl 4 are attracted by weak intermolecular force while
ions in YCl are attracted by strong electrostatic force //
Attraction force between particles in YCl is stronger than particles in

XCl 4.
Molekul dalam XCl 4 tertarik oleh daya intermolekul yang lemah
sementara ion dalam YCl tertarik oleh daya elektrostatik yang kuat //
Daya tarikan antara zarah dalam YCl lebih kuat daripada zarah di XCl 4.

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