MATERIALS : English - Chemestry
Authored by Inta Zorge
Chemistry
9th Grade
Used 2+ times
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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dots ķīmiskās reakcijas vienādojums: 2Fe2O3 + 3CO → 4Fe + 3CO2
CO šajā reakcijā ir:
izejviela
produkts
reducētājs
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The first bicycles had wheels made of
wood iron tyres
iron with rubber tyres
iron with wooden tyres
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dots ķīmiskās reakcijas vienādojums: 2Fe2O3 + 3CO → 4Fe + 3CO2
Fe2O3 ir šī procesa:
izejviela
produkts
reducētājs
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these metals is the hardest?
aluminium
steel
gold
iron
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dots ķīmiskās reakcijas vienādojums: 2Fe2O3 + 3CO → 4Fe + 3CO2
Fe ir šī procesa:
izejviela
produkts
reducētājs
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dots ķīmiskās reakcijas vienādojums: 2Fe2O3 + 3CO → 4Fe + 3CO2
Dzelzs iegūšanas reakcija no dzelzs rūdas ir
reducēšanās process
oksidēšanās process
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these materials did the Ancient Romans not have?
paper
concrete
glass
ceramic
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