
Materie.Corp. Substanta
Quiz
•
Chemistry
•
7th Grade
•
Hard

Muresan Cornelia
Used 191+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Care dintre substantele de mai jos sunt solide la temperature si presiune normala?
sarea de bucaterie,dioxidul de carbon,piatra vanata
sulf,aluminiu,soda de rufe
zahar, var stins,,oxigen
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Alege doar fenomenele chimice
arderea magneziului,condensarea apei,coclirea vaselor de arama
ruginirea fierului, dizolvarea zaharului, evaporarea apei
rancezirea grasimilor, arderea carbonului, fermentarea mustului
3.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Sirul care contine numai fenomene fizice este:
evaporarea apei, dilatarea termica a mercurului, dizolvarea sodei caustice
dilatarea sinelor de tren, ruginirea fierului, arderea gazului metan
dizolvarea zaharului, sublimarea iodului, condensarea vaporilor de apa
4.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Sunt solubile in apa
zaharul,sarea de lamaie
alcoolul,sarea de bucatarie
soda caustica,piatra vanata
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Substanta pura:
este un amestec de mai multe subsante
isi modifica compozitia atunci cand este supusa unor fenomene fizice
este perfect curata
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pentru amestecurile omogene este valabila afirmatia:
prezinta in toata masa aceeasi compozitie
componentele reactioneaza intre ele
componentele nu se pot separa prin procedee fizice
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Succesiunea de operatii necesare pentru separarea componentelor din amestecul pilitura de fier+sare de bucatarie+nisip este:
tratare cu apa, decantare, magnetizare, cristalizare
apropierea unui magnet, tratare cu apa, decantare, cristalizare
tratare cu apa, cristalizare, filtrare, decantare
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