Unsur Alkali dan Alkali Tanah
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Medium
I Mendera
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Senyawa logam yang memberikan nyala berwarna ungu dalam kembang api adalah....
natrium
magnesium
kalium
stronsium
barium
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diantara sifat unsur golongan alkali tanah (magnesium hingga barium) yang bertambah seiring dengan bertambahnya nomor atom adalah ....
kelarutan garam kromatnya
titik leleh dan titik didihnya
pH larutan jenuh basanya
energi ionisasi tingkat pertama
kelarutan garam sulfatnya
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pasangan senyawa alkali tanah berikut, yang keduanya sukar larut dalam air adalah....
MgSO4 dan Ba(OH)2
Mg(OH)2 dan CaCrO4
CaC2O4 dan MgCrO4
Mg(OH)2 dan Sr(OH)2
MgCO3 dan BaSO4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Persamaan reaksi yang benar bila sepotong logan natrium dimasukkan dalam segelas air adalah ….
2 Na(s) + H2O (l) Na2O(s) + H2(g) + energi
2 Na(s) + 2 H2O (l) 2 NaOH(aq) + H2(g) + energi
2 Na(s) + 2 H2O (l) 2 NaOH(aq) + ½ O2(g) + energi
2 Na(s) + 2 H2O (l) 2 Na(OH)2 (aq) + H2(g) + energi
2 Na(s) + 2 H2O (l) 2 Na2O2 (aq) + H2(g) + energi
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Elektrolisis cairan kalsium klorida dengan elektrode karbon menghasilkan ....
H2 dan O2
H2 dan Cl2
Ca(OH)2 dan H2
Ca dan Cl2
Ca(OH)2 dan Cl2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Zat aktif yang terdapat dalam pemutih adalah ....
NaClO4
NaClO3
NaClO2
NaClO
NaCl
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diantara basa alkali tanah di bawah ini, yang merupakan basa paling kuat adalah ....
Be(OH)2
Mg(OH)2
Ca(OH)2
Sr(OH)2
Ba(OH)2
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