
Pengaratan Besi
Authored by Neyla Yaw
Chemistry
12th Grade
Used 61+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rajah menunjukkan setitis air di atas sebatang besi. Persamaan manakah yang berlaku di katod?
Fe --> Fe2+ + 2e-
Fe2+ + 2e- --> Fe
O2 + 2H2O + 4e- --> 4OH-
4OH- --> O2 + 2H2O + O2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Gambar rajah menunjukkan mekanisme pembentukan karat. Antara pernyataan berikut yang manakah benar mengenai mekanisme ini?
Satu atom ferum membebaskan dua elektron membentuk satu ion ferum(II)
Satu ion ferum(II) menerima dua elektron daripada satu atom ferum
Satu molekul oksigen menerima dua elektron untuk membentuk satu ion hidroksida
Empat ion hidroksida terbentuk apabila dua molekul air menerima empat elektron
3.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
...... logam ialah tindak balas redoks di mana logam dioksidakan secara semula jadi melalui kehilangan elektron untuk membentuk ion logam.
4.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Kakisan besi dan aloi besi dikenali sebagai ……….
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Yang manakah bukan syarat pengaratan
Air
Oksigen
Air garam
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fe --> Fe2+ + 2e ini ialah proses pengoksidaan dengan ....
membuang elektron
menerima elektron
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kawasan di mana pengoksidaan berlaku dipanggil ...
anod
katod
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