
Kā izmanto ūdeni?
Authored by Laura Martinova
Chemistry
8th Grade
Used 5+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kuras ir ūdens fizikālās īpašības?
Ūdens ir nepieciešams dzīvības procesiem.
Ūdens reaģē ar skābajiem oksīdiem.
Ūdens sacietē pie 0 oC un vārās pie 100 oC temperatūrā.
Ūdens dabā sastopams saldūdens un sāļūdens veidā.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kāpēc destilācijas procesā var atdalīt šķidras vielas no maisījuma?
Vielām ir atšķīrīgi blīvumi.
Vielām ir atšķirīgas viršanas temperatūras.
Vielām ir atšķirīgas krāsas.
Vielām ir atšķirīgas ķīmiskās īpašības.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kur izmanto destilētu ūdeni?
Pārtikas rūpniecībā.
Zivsaimniecībā.
Lauksaimniecībā.
Farmaceitiskajā rūpniecībā.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kuru no vielām var izmantot ūdens mīkstināšanai?
Nātrija hlorīdu.
Nātrija karbonātu.
Sērskābi.
Sālsskābi.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kāda ir KNO3 šķīdība 70 oC temperatūrā?
14 g
45 g
70 g
140 g
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kāda ir cukura masas daļa šķīdumā, ja 400 g šķīduma satur 80 g cukura?
0,2 %
5 %
20 %
25 %
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cik gramu nātrija hlorīda nepieciešams, lai pagatvotu 300 g 5 % nātrija hlorīda šķīduma?
15 g
30 g
45 g
60 g
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