Ripasso cap.3 - CHIMICA
9th Grade
•17 Qs
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Ripasso cap.3 - CHIMICA
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
ROBERTA GENNA
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17 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Le trasformazioni fisiche
Provocano un cambiamento fisico reversibile della materia e non ne alterano la composizione chimica
Comportano una variazione della composizione chimica delle sostanze originarie con formazione di nuove sostanze
Sono definite anche REAZIONI CHIMICHE.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Le reazioni chimiche sono sempre irreversibili
VERO
FALSO
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tra i fenomeni osservabili durante una reazione chimica vi è la formazione di bollicine
VERO
FALSO
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Le reazioni endoergoniche
liberano energia
assorbono calore
assorbono energia dall'esterno
producono calore
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Le reazioni esotermiche
Liberano energia
Producono calore
Assorbono energia dall'esterno
Assorbono calore
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un elemento è una sostanza pura che non può essere scomposta o trasformata in sostanze più semplici in attraverso processi chimici
VERO
FALSO
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Il simbolo chimico dell'elemento zolfo è:
Na
Ca
S
C
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