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e. KEMIJA - Peta domaća zadaća

Quiz
•
Chemistry
•
8th Grade
•
Medium
Algebra srednja
Used 3+ times
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
porastom nadmorske visine
povećanjem volumena zraka
smanjenjem gustoće zraka
smanjenjem nadmorske visine
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Dušik je pri sobnoj temperaturi i normalnome atmosferskom tlaku:
bolje topljiv u vodi od kisika
kemijski inertan plin
plin veće gustoće od zraka
tekućina plave boje
3.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Koje su tvrdnje netočne? (Više je točnih odgovora.)
Kišnica je kemijski čista voda.
Plinovi se bolje otapaju u hladnoj vodi.
Led ima veću gustoću od vode.
Voda je najgušća pri 0 ⁰C.
Morska sol snizuje ledište vode.
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Luka je u jednu štrcaljku uvukao 20 mL atmosferskog zraka, a Ivan u drugu štrcaljku 20 mL zraka izdahnutog iz pluća. Svatko je svoju štrcaljku uronio u 2 mL bistre tekućine koju je imao u laboratorijskoj čaši. Nakon što su u bistre tekućine polako i uz protresanje sadržaja u čaši, istisnuli sav zrak iz štrcaljke, promjene u čašama bile su vidljive, ali različitog inteziteta. Rezultati pokusa dokazali su da u atmosferskom zraku ima manje ugljikova dioksida nego u izdahnutom.
netočno
točno
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Plin A u smjesi s plinom B u volumnome omjeru 2 : 1 stvara eksplozivnu plinsku smjesu C. Eksplozijom smjese C nastaje kemijski spoj D. Elektrolizom se spoj D može rastaviti na plinove A i B.
točno
netočno
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