
ALKALI
Authored by Siti Afsoh, S.Pd.
Chemistry
12th Grade
Used 107+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika senyawa KNO3 dibakar di atas api maka warna nyala dari Kalium adalah….
ungu
merah
hijau
kuning
biru
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diantara senyawa berikut ini yang dapat dipakai sebagai bahan peledak adalah…
KNO3
NaHCO3
Na2CO3
MgSO4.7H2O
CaSO4.2H2O
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Konfigurasi elektron berikut ini yang merupakan konfigurasi elektron dari unsur alkali adalah….
[Ar] 3d1 4s1
[Kr] 5s1
[Ar] 3d5 4s1
[Ne] 3s2 3p1
[Ar] 4s2 3d1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diantara sifat-sifat dibawah ini yang bukan sifat logam alkali adalah ….
Mudah bereaksi dengan air
Lunak, mudah diiris dengan pisau
Membentuk oksida basa
Putih mengkilap seperti perak
Terdapat di alam dalam keadaan bebas
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pengujian suatu cuplikan yang mengandung unsur logam alkali menghasilkan warna kuning. cuplikan tersebut mengandung unsur . . . .
litium
natrium
kalium
rubidium
cesium
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Logam alkali biasanya disimpan dalam cairan inert, karena logam alkali sangat mudah bereaksi dengan air dan oksigen. Yang termasuk cairan inert adalah…
larutan gula
cuka
kerosin/ minyak tanah
minyak sawit
larutan garam dapur
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Logam alkali yang bersifat radioaktif adalah... .
Na
K
Rb
Cs
Fr
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