REDOKS ~Penyesaran logam daripada larutan garamnya
Quiz
•
Chemistry
•
9th Grade
•
Medium
Norbaya Mat Sa'ad
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kepingan logam zink dicelupkan ke dalam larutan kuprum(II) sulfat.Apakah pemerhatian selepas 15 minit?
Kepingan zink menebal.
Pepejal kelabu terbentuk pada permukaan kepingan zink yang masih tinggal
Warna biru larutan kuprum(II) sulfat menjadi tidak berwarna.
Gelembung gas terbebas.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kepingan logam kuprum dicelupkan ke dalam larutan argentum nitrat. Apakah pemerhatian selepas 15 minit?
Pepejal perang terbentuk .
Larutan tidak berwarna bertukar menjadi biru.
Gelembung gas terbebas.
Kepingan kuprum menjadi tebal.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Magnesium ditambah ke dalam larutan kuprum(ii) sulfat. Tindak balas penyesaran berlaku.Yang manakah di antara berikut benar mewakili setengah persamaan pengoksidaan yang berlaku.
Mg → Mg2+ + 2e
Mg + 2e → Mg2+
Cu2+ + 2e → Cu
Cu2+ → Cu + 2e
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Logam Z menyesarkan zink daripada larutan garamnya. Yang manakah di antara penyataan berikut benar tentang logam Z.
Logam Z kurang elektropositif daripada kuprum.
Logam Z adalah agen penurunan yang lebih baik daripada zink.
Logam z mengalami penurunan dalam larutan garam zink.
Logam Z menerima elektron untuk membentuk ion yang bercas positif.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kepingan logam zink dicelupkan ke dalam larutan kuprum(II) sulfat. Yang manakah di antara berikut menunjukkan tindak balas pengoksidaan yang berlaku?
Cu2+ + 2e → Cu
Cu → Cu2++ 2e
Zn → Zn2+ + 2e
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Berdasarkan rajah di atas, penyataan yang manakah benar tentang pemerhatian yang berlaku..
Atom zink menderma dua elektron membentuk ion, Zn2
Zink diturunkan
Ion kuprum(II), Cu2+ menderma dua elektron membentuk atom kuprum
Ion kuprum(II), Cu2+ dioksidakan
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Yang manakah di antara berikut mewakili persamaan ion bagi tindak balas di antara kepingan zink dengan larutan kuprum (ii) sulfat.
Zn2+ + Cu+ → Zn + Cu2+
Zn2+ + Cu → Zn + Cu2+
Zn + Cu2+ → Zn2+ + Cu
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