KUIS IA DAN IIA
Quiz
•
Chemistry
•
12th Grade
•
Hard
Dahliana Dahliana
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20 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Jika senyawa KNO3 dibakar di atas api maka warna nyala dari Kalium adalah….
ungu
merah
hijau
kuning
tidak berwarna
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Berikut ini yang merupakan sifat unsur-unsur logam alkali, kecuali….
titik lelehnya dari atas hingga ke bawah semakin kecil
titik didinya dari atas hingga ke bawah semakin kecil
energi ionisasi yang tinggi
potensial elektroda rendah
massa jenis yang rendah
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Keteraturan yang tempak pada unsur-unsur golongan IA (alkali) dari atas ke bawah adalah….
kerapatan semakin kecil
titik didih semakin kecil
kekerasan semakin besar
jari-jari logam semakin kecil
jari-jari ionic semakin kecil
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Unsur alkali yang sifatnya mirip dengan magnesium adalah….
Cs
Rb
K
Na
Li
5.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Pada natrium jika diberi oksigen berlebihan maka senyawa yang dihasilkan adalah….
NaO
Na2O2
Na2O
NaO2
2Na2O
6.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Pada elektrolisis larutan garam logam alkali tidak dihasilkan logamnya karena….
sifat oksidatornya lemah
sifat reduktornya lemah
ion logamnya tidak mengalami reduksi
garam halidanya mempunyai titik leleh tinggi
energi ionisasinya tinggi dari logam lain
7.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Diantara sifat-sifat dibawah ini yang bukan sifat logam alkali adalah ….
Mudah bereaksi dengan air
Terdapat di alam dalam keadaan bebas
Putih mengkilap seperti perak
Membentuk oksida basa
Lunak, mudah diiris dengan pisau
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