
4.2 Getah Asli
Authored by MOHD Moe
Chemistry
7th - 12th Grade
Used 45+ times

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10 questions
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1.
FILL IN THE BLANK QUESTION
45 sec • 1 pt
Monomer untuk getah asli ialah _____________.
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Berdasarkan senarai di bawah, pilih sifat-sifat yang sesuai untuk getah asli.
Tidak reaktif dan sukar untuk dioksidakan
Tahan lasak dan menyerap air
Tidak boleh mengalirkan arus elektrik
Tidak tahan haba yang tinggi
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Lateks boleh dicegah daripada menggumpal dengan menambahkan alkali lemah seperti larutan ammonia. Apakah peranan alkali?
Alkali menghakis membran protein
Alkali meneutralkan asid dalam lateks
Alkali meneutralkan cas negatif pada zarah getah
Alkali meneutralkan ion hidrogen yang dibebaskan oleh tindakan bakteria
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Apabila lateks dibiarkan, lateks itu akan perlahan-lahan menggumpal. Bahan manakah boleh ditambah kepada lateks untuk mempercepatkan pembekuannya?
Ammonia
Asid etanoik
Kalium hidroksida
Kalsium klorida kontang
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Sekeping getah dicelup ke dalam bikar yang mengandungi pelarut organik dan sebatian X selama beberapa minit. Selepas itu, kepingan getah dikeluarkan dan dikeringkan. Didapati kepingan getah menjadi lebih kenyal dan tahan panas. Apakah sebatian X?
Asid etanoik
Air kapur
Disulfur diklorida
Natrium hidroksida
6.
FILL IN THE BLANK QUESTION
45 sec • 1 pt
__________________ getah merupakan satu kaedah yang digunakan untuk mengatasi ciri-ciri getah asli seperti tidak tahan haba dan mudah dioksidakan.
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Antara berikut, yang manakah struktur yang betul bagi getah asli tervulkan?
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