
Kimia Unsur
Authored by Meydia Afrina
Chemistry
12th Grade
Used 7+ times

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10 questions
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1.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Peranan besi dalam kehidupan sehari-hari sangat penting. Besi banyak digunakan dalam kehidupan sehari-hari. Besi diperoleh dengan cara mengekstrasi mineralnya. Rekasinya:
C(s) + O2(g) ® CO2(g)
C(s) + CO2(g) ® 2CO2(g)
3Fe2O3(s) + CO(g) ® 2Fe3O4(s) + CO2(g)
Fe3O4(s) + CO(g) ® 3FeO(g) + CO2(g)
FeO(s) + CO(g) ® Fe(l) + CO2(g)
Proses pembuatan/pengolahan unsur tersebut dikenal dengan nama…
Wohler
Frash
Hall-Herault
Tanur Tinggi
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Perhatikan tabel nama batuan dengan unsur yang dikandungnya.
No. Nama Batuan Unsur yang Dikandung
1 Kriolit Ca
2 Dolomit Ca
3 Karnalit Mg
4 Stronsianit Ba
5 Bauksit Al
Pasangan data yang keduanya berhubungan secara tepat adalah…
1 dan 2
3 dan 4
2 dan 5
1 dan 4
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Gas mulia mempunyai konfigurasi elektron paling stabil. Pernyataan berikut yang tidak sesuai dengan keadaan unsur gas mulia adalah…
energi ionisasinya terbesar dalam periodenya
di alam selalu dalam keadaan bebas
semua gas mulia tidak dapat dibuat senyawanya
semakin besar nomor atomnya, semakin reaktif
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui beberapa sifat unsur:
1. Pada umumnya senyawanya berwarna
2. sebagai unsur bebas bersifat racun
3. sukar bereaksi dengan unsur lain
4. sangat reaktif, sehingga di alam hanya terdapat sebagai senyawa
5. dengan basa kuat memberikan reaksi autoredoks
Yang merupakan sifat unsur halogen adalah…
1-2-3
2-3-4
2-4-5
3-4-5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui potensial reduksi standar unsur-unsur halogen sebagai berikut:
F2(g) + 2e- ® 2F-(aq) Eo = +2,87 V
Cl2(g) + 2e- ® 2Cl-(aq) Eo = +1,36 V
Br2(g) + 2e- ® 2Br-(aq) Eo = +1,06 V
I2(g) + 2e- ® 2I-(aq) Eo = +0,54 V
Berdasarkan harga Eo, reaksi di bawah ini yang tidak berlangsung adalah…
F2 + NaCl
Cl2 + KBr
Br2 + KI
Br2 + NaF
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Basa alkali tanah yang paling sukar larut dan bersifat ammfoter adalah…
Be(OH)2
Mg(OH)2
Ca(OH)2
Sr(OH)2
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Garam kalium dan garam barium jika dibakar pada nyala bunsen akan memberikan spectrum emisi warna…
ungu dan hijau
kuning merah
ungu dan biru
hijau dan kuning
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