Viktoriin
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Hard
Ly Suursild
Used 9+ times
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51 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Millest koosneb aatomi tuum?
Prootonitest ja elektronidest
Elektronidest ja neutronitest
Neutronitest ja prootonitest
Prootonitest
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perioodi number näitab...
prootonite arvu aatomis
elektronide arvu aatomis
elektronide arvu viimases elektronkihis
elektronkihtide arvu aatomis
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Metalli ja happe vahelisel reaktsioonil...
metall oksüdeerub ja vesinikioonid käituvad oksüdeerijana
veisinikioonid redutseeruvad ja metall käitub oksüdeerijana
metall oksüdeerub ja vesinikioonid käituvad redutseerijana
nii metall kui vesinik redutseeruvad
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Milline ühend tekib kaltsiumi ja hapniku reageerimisel?
K2O
Ca2O
CaO
Ca(OH)2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Happevihmad kahjustavad tugevasti loodust. Paljud materjalid lagunevad happevihmade toimel, sealhulgas ka lubjakivi ja marmor. Mis on lubjakivi keemiline valem?
Na2O
CaO
Na2CO3
CaCO3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Neli õhupalli täidetakse erinevate gaasidega: hapnik, argoon, lämmastik ja veeaur. Millise gaasiga täidetud õhupall tõuseb õhku?
Argooniga
veeauruga
hapnikuga
lämmastikuga
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tänu taimedes toimuvale fotosünteesile tekib Maa atmosfääri hapnikku. Samas protsessis tekib, aga ka väga oluline orgaaniline aine. Mis on selle aine nimi ja valem?
fruktoos valemiga C5H12O6
glükoon valemiga C6H12O6
glükoos valemiga C6H6O6
glükoos valemiga C6H12O6
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