Keemia S&A
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Medium
Anni Nurmsalu
Used 2+ times
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11 questions
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1.
MULTIPLE SELECT QUESTION
20 sec • 2 pts
Millised on keemilised omadused?
(2 õiget)
Tihedus
Aluse võime põleda.
Aine lahustumine vees
Aine reageerimine veega.
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Vali ÜKS keemilise reaktsiooni tunnus.
Sulamine
Enesetunde muutus.
Lõhna muutus.
Maitse muutus.
3.
MULTIPLE SELECT QUESTION
45 sec • 2 pts
Mis iseloomustab lihtainet? (2 vastust)
Koosneb ühest keemilisest elemendist.
Koosneb mitmest erinevast keemilisest elemnedist.
Näiteks Mg, Ga, Br.
Näiteks CaO, BeCl.
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Millest koosneb segu?
Koosneb ainult ühe aine osakestest.
Koosneb mitme aine osakestest.
5.
MULTIPLE SELECT QUESTION
45 sec • 2 pts
Oksüdatsiooniaste (2 vastust)
On ainult osadel ainetel kindel.
Näitab elemendi laengu suursut eeldusel, et aine koosneb prootonitest.
On kõikidel ainetel kindel.
Näitab elemendi laengu suurust ühendis eeldusel, et aine koosneb ioonidest.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Milline on korektne põlemisreaktsiooni võrrand?
Na + O = NaO
K + OH = KOH
7.
MULTIPLE SELECT QUESTION
45 sec • 2 pts
Millised on õiged keemia ohutusmärgid?
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