Chimica
Quiz
•
Science
•
10th Grade
•
Practice Problem
•
Hard
Danilo Testa
Used 2+ times
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Una sostanza pura ha:
una composizione simile a quella dell'acqua distillata
composizione definita ma non costante
composizione definita e costante
concentrazione costante ma non definita
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Le proprietà fisiche e chimiche di una sostanza pura sono:
definite
definite e costanti
costanti
pure
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Come si definisce la percentuale di sostanza pura rispetto al totale della sua massa?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quale tra questi non è un criterio di purezza?
densità
temperatura di fusione
solubilità
temperatura di ebollizione
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
I miscugli hanno temperature di fusione e di ebollizione che variano in intervalli più ampi delle rispettive sostanze pure:
VERO
FALSO
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La densità dell'alluminio è maggiore di quella dell'oro:
VERO
FALSO
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quanti carati ha l'oro puro?
18
22
24
12
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