Kimia Unsur : Alkali
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Medium
Choirotul Chikmiyah
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20 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Logam natrium bila dimasukkan ke dalam air akan bereaksi membentuk larutan natrium hidroksida dan gas hidrogen. Persamaan reaksi yang tepat dan setara adalah ....
Na(s) + H2O(l) -> NaOH(aq) + H2(g)
2Na(s) + 2H2O(l) -> 2NaOH(aq) + H2(g)
Na(s) + 2H2O(l) -> NaOH(aq) + H2(g)
2Na(s) + H2O(l) -> Na2O(s) + H2(g)
3Na(s) + 2H2O(l) -> 3NaOH(aq) + H2(g)
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Data pengamatan logam Na direaksikan dengan air yang ditetesi dengan fenolftalein sebagai berikut.
1) timbul gas
2) timbul letupan
3) terjadi nyala
4) warna air berubah merah
zat yang dihasilkan adalah ....
gas H2 dan gas H2O
gas O2 dan gas H2
gas O2 dan energi yang besar
larutan NaOH dan gas H2
larutan NaOH dan gas O2
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Berikut beberapa senyawa kimia yang digunakan dalam kehidupan sehari-hari.
(1) Freon (CCl2F2)
(2) Natrium benzoat (C6H5COONa)
(3) Kalium iodat (KIO3)
(4) Kalsium fosfat (Ca3(PO4)2)
(5) Kaporit (Ca(OCl)2)
(6) Soda kue (NaHCO3)
Pasangan senyawa yang dapat digunakan dalam makanan dengan jumlah sedikit adalah nomor ....
(1) dan (3)
(2) dan (4)
(2) dan (6)
(3) dan (5)
(4) dan (5)
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Berikut ini beberapa sifat unsur.
(1) Reduktor kuat
(2) Mudah membentuk ion dengan muatan -1
(3) Bereaksi dengan air membentuk basa kuat
(4) Umumnya berwujud gas
Sifat unsur golongan alkali terdapat pada nomor ....
(1) dan (2)
(1) dan (3)
(2) dan (3)
(2) dan (4)
(3) dan (4)
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Berikut beberapa sifat unsur dalam sistem periodik.
(1) Reaktif
(2) Reduktor
(3) Molekulnya diatomik
(4) Membentuk asam
Sifat unsur yang sesuai dengan sifat unsur golongan IA yaitu ....
(1) dan (2)
(1) dan (3)
(2) dan (3)
(2) dan (4)
(3) dan (4)
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Soda kue, NaHCO3, dibuat melalui proses ....
Haber Bosch
Sisilia
Solvay
Kontak
Deacon
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Unsur logam alkali yang kurang reaktif terhadap air adalah ....
Cs
Rb
K
Na
Li
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