8. DEGUONIS. ANGLIS.
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Hard
Vygandas Marozas
Used 26+ times
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16 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ar tiesa, kad deguonis yra pagrindinė oro sudedamoji dalis?
Taip
Ne
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Alotropija – elementų savybė sudaryti kelias ___________ medžiagas – skirtingos struktūros ir savybių.
sudėtines
vienines
jungtines
pavienes
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ar tiesa, kad visi cheminiai elementai turi alotropines atmainas?
Taip
Ne
Kai kada
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Oksidai yra junginiai, kurių molekulėse yra tik du cheminiai elementai. Pažymėk oksidų formules.
Al2S3
Na2S
Al2O3
SO2
ZnS
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pažymėk neteisingą teiginį.
Degant vieninėms medžiagoms susidaro oksidai.
Azoto oksidai teršia orą.
Deguonyje medžiagos dega greičiau negu ore.
Fotosintezė – deguonies prijungimo reakcija.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Degimui reikalingas deguonis. Kurios medžiagos gaisrininkai nenaudotų gesindami gaisrą?
Anglies
Smėlio
Vandens
Anglies(IV) oksido
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kuri iš pateiktų formulių yra kalio oksido?
K2O
K2O2
KO2
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