Kimia unsur Alkali

Quiz
•
Chemistry
•
12th Grade
•
Medium
Tri Winoko
Used 136+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Unsur alkali dengan urutan Cs, Rb, K, Na, dan Li memiliki sifat berikut, kecuali ….
Jari-jari atom makin kecil
Energy ionisasi semakin kecil
Elektronegativitas makin besar
Nomor atom semakin kecil
Massa atom semakin kecil
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Di bawah ini beberapa sifat logam akali, kec-uali ….
Mudah bereaksi dengan air
Lunak, mudah diiris dengan pisau
Dengan udara membentuk oksida basa
Putih mengkilap seperti perak
Terdapat dialam dalam keadaan bebas
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Jika logam Na dimasukan ke dalam air yang sudah ditetesi indicator p p maka larutan berubah menjadi merah. Pada reaksi tersebut zat yang dihasilkan adalah ….
O2
H2
Na2O
NaOH
NaH
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Warna nyala logam alkali yang berwarna kuning berasal dari unsur ….
Li
Na
K
Rb
Cs
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Di antara basa-basa alkali di bawah ini yang paling kuat adalah ….
Litium hidroksida
Kalium hidroksida
Natrium hidroksida
Rubidium hidroksida
Sesium hidroksida
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Titik didih logam alkali terbesar dimiliki oleh unsur ….
Li
Na
K
Rb
Cs
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Reaksi antara logam dengan gas nitrogen dapat digambarkan sebagai berikut.
(1) 6Li(s) + N2(g) → 2Li3N(s)
(2) 6Na(s) + N2(g) → 2Na3N(s)
(3) 6K(s) + N2(g) → 2K3N(s)
(4) 6Rb(s) + N2(g) → 2Rb3N(s)
(5) 6Cs(s) + N2(g) → 2Cs3N(s)
Dari reaksi di atas yang berlangsung adalah ….
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