
Anca G
Authored by Anca G
Chemistry
8th Grade
Used 1+ times

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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Substanţele care intră într-o reacţie chimică (care reacţionează între ele) se numesc:
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În cazul reacţiei dintre fier şi sulfat de cupru:
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Reprezintă o reacție chimică:
spargerea unui geam
arderea magneziului
sublimarea
dizolvarea
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Alegeţi ecuaţia scrisă corect:
Mg + O2 → MgO
Mg + O2 → 2MgO
2Mg + O2 → 2MgO
2Mg + O2 → MgO
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Coeficienţii care asigură respectarea legii conservării numărului de atomi pentru pentru ecuaţia reacţiei
Al + S → Al2S3
sunt (în ordine):
3,2,1
2,3,1
2,3,2
2,1,3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În reacţia:
zinc + acid clorhidric → clorură de zinc + hidrogen,
produşii de reacţie sunt:
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În 4 molecule de sulfat de aluminiu, 4Al2(SO4)3 se găsesc:
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