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Authored by MIHAELA-ECATERINA IONESCU

Chemistry

9th Grade

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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

În condiţii normale, oxigenul, O2, are densitatea de:           

1,9646 g/l

1,9646 g/m3

1,42 g/l

1,42 g/m3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1.           Iodura de sodiu se dizolvă în:

apă

alcool

benzen

tetraclorură de carbon

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1.           Ce gaz este esențial pentru fotosinteză?

metan

heliu

azot

dioxid de carbon

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Care este formula chimică a apei?

O2

NaCl

CO2

H2O

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

3.           Ce element chimic are simbolul 'Fe'?

Fier

Fluor

Fosfor

Argint

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