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Authored by NUR Moe
Chemistry
4th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Formula untuk ion nitrat ialah NO3- dan ion karbonat ialah CO32-. Jika formula garam nitrat bagi X ialah X(NO3)3. Apakah formula garam karbonat bagi X.
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Persamaan diatas mewakili penguraian garam karbonat M apabila dipanaskan dengan kuat.
Apakah jisim yang diperlukan untuk menghasilkan 8.0 g MO?
(JAR: C=12, O=16, M=64)
3.7 g
6.2 g
9.2 g
12.4 g
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apakah yang dimaksudkan dengan pemalar Avogadro, NA?
Jisim bagi satu mol bahan
Tekanan bagi satu mol bahan
Isipadu yang dipenuhi oleh satu mol gas
Bilangan zarah dalam satu mol bahan
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Berapakah jisim kalium sufat, K2SO4 yang mengandungi 1.8X1023 unit?
(JAR: K=39, S=32, O=16, NA=6X1023)
5.22 g
7.95 g
52.2 g
79.5 g
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Persamaan diatas mewakili satu tindak balas.
Apakah bahan-bahan tindak balas dalam persamaan ini?
Asid hidroklorik dan zink klorida
Asid hidroklorik dan zink
Zink klorida dan hidrogen
Zink dan zink klorida
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Alisin adalah sebatian yang menyebabkan bau pada bawang . Alisin terdiri daripada 44.4% karbon, 6.21% hidrogen, 39.5% sulfur dan selebihnya adalah oksigen. Apakah formula empirik alisin?
(JAR: H=1, C=12, S=32, O=16)
CHSO
C6H10S20
C12H10S2O
C12H10S4O
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bahan yang manakah wujud sebagai atom?
CO2
H2
Zn
Cl-
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