The diagram shows the mechanism of rust formation.
Gambar rajah menunjukkan mekanisme pembentukan karat.
Which of the following statements is true about this mechanism?
Antara pernyataan berikut yang manakah benar mengenai mekanisme ini?
T/B REDOKS DALAM KAKISAN LOGAM/ PENGARATAN BESI
Quiz
•
Chemistry
•
12th Grade
•
Medium
NOOR KHAIRATI HASSAN Moe
Used 14+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The diagram shows the mechanism of rust formation.
Gambar rajah menunjukkan mekanisme pembentukan karat.
Which of the following statements is true about this mechanism?
Antara pernyataan berikut yang manakah benar mengenai mekanisme ini?
An iron atom releases two electrons to form an iron(II) ion
Satu atom ferum membebaskan dua elektron membentuk satu ion ferum(II)
An iron(II) ion receives two electrons from an iron atom
Satu ion ferum(II) menerima dua elektron daripada satu atom ferum
An oxygen molecule receives two electrons to form a hydroxide ion
Satu molekul oksigen menerima dua elektron untuk membentuk satu ion hidroksida
Four hydroxide ions are formed when two water molecules receive four electrons
Empat ion hidroksida terbentuk apabila dua molekul air menerima empat elektron
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The diagram shows the rusting process of iron.
Rajah menunjukkan proses pengaratan besi.
Which of the following equations occurs at the cathode?
Antara persamaan berikut, yang manakah berlaku di katod?
Fe → Fe2+ + 2e–
Fe2+ + 2e– → Fe
O2 + 2H2O + 4e– → 4OH–
4OH– → O2 + 2H2O + 4e–
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following metal can prevent rusting when it is in contact with iron?
Antara logam berikut, manakah yang dapat mencegah pengaratan apabila bersentuh dengan besi?
Lead
Plumbum
Silver
Argentum
Copper
Kuprum
Aluminium
Aluminium
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Iron rusts in the presence of oxygen and water.
Which method causes iron to rust faster?
Besi berkarat dengan kehadiran oksigen dan air.
Kaedah manakah menyebabkan besi berkarat lebih cepat?
Coating iron with tin
Penyaduran besi dengan stanum
Touching iron with lead
Penyentuhan besi dengan plumbum
Galvanizing iron with zinc
Penggalvanian besi dengan zink
Connecting iron to magnesium
Penyambungan besi kepada magnesium
5.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Kakisan logam ialah tindak balas redoks di mana logam mengalami ........................ secara spontan kepada ion-ionnya dengan melepaskan elektron untuk membentuk ion logam
6.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
lengkapkan persamaan tindak balas kakisan Magnesium;
.......... Mg 2e
7.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Berdasarkan pemerhatian eksperimen di atas, nyatakan logam-logam yang boleh menghalang pengaratan besi
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