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Chemistry Form 4 • MODULE

Plastic reinforced with High tensile strength, Making water storage tanks,
Fibre glass
Plastik yang glass fiber . low density, easily moulded in boats, helmets
diperkukuhkan Plastik yang diperkukuhkan dengan thin
dengan kaca gentian kaca . layers.
Daya regangan tinggi, ketumpatan
rendah , mudah dibentuk menjadi
lapisan nipis .
Photochromic Photochromic substance like Darken when exposed to bright Making optical lens, car wind
glass silver chloride embedded light and becomes clear when shield light intensity meters
Kaca fotokromik in glass/transparent polymers exposed to dim light.
Bahan fotokromik seperti Menjadi gelap apabila dikenakan
argentum klorida digabungkan cahaya cerah dan menjadi cerah
dengan kaca atau polimer lut sinar. dalam cahaya malap.

EXERCISE / LATIHAN

1 The diagram below shows the reaction involve in the production of fertilizer Z in industry.
Rajah berikut menunjukkan tindak balas yang terlibat dalam pembuatan baja Z dalam industri.

Process X Ammonia
Proses X Ammonia Reaction P
Tindak balas P Compound Z
Sebatian Z
Process Y Sulphuric acid
Proses Y Asid sulfurik

(a) (i) Name Process X and Process Y.
Namakan Proses X dan Proses Y.
Process X / Proses X: Haber process Process Y / Proses Y: Contact process

(ii) Complete the following table related to process X and Y.
Lengkapkan jadual berikut yang berkaitan dengan proses X dan Y.

Pressure/ Balanced equation for the reaction
Process Catalyst Temperature/°C atm that Involve a catalyst
Proses Mangkin Suhu/°C Persamaan kimia tindak balas yang melibatkan
Tekanan / atm
mangkin
Process X Iron 400 – 500 200
Proses X Besi N 2 + 3H 2 2NH 3
Process Y Vandaium(V) oxide 450 – 500 2 – 3
Proses Y Vanadium(V) oksida 2SO 2 + O 2 2SO 3

(b) Ammonia react with sulphuric acid through reaction P to produce compound Z.
Ammonia bertindak balas dengan asid sulfurik melalui tindak balas P menghasilkan sebatian Z.
(i) Write a balance equation for reaction P.
Tuliskan persamaan seimbang bagi tindak balas P.

NH 3 + H 2 SO 4 (NH 4 ) 2 SO 4
(ii) What is the type of reaction that takes place?
Apakah jenis tindak balas yang berlaku?
Neutralisation

(iii) State one important use of compound Z.
Nyatakan satu kegunaan penting sebatian Z.
Fertiliser

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