
9 клас
Authored by Daruna Bura
Chemistry
9th - 12th Grade
Used 5+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Формула спирту, який містить 5 атомів Карбону :
C2H5OH
C5H10OH
C5H11OH
C5H12OH
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Вкажіть якісний реактив на гліцерин:
KMnO4
Br2
Cu(OH)2
лакмус
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Хімічній формулі C2H5OH відповідає назва:
пропанол
бутанол
етанол
метанол
4.
MULTIPLE CHOICE QUESTION
3 mins • 2 pts
Яку масу має 0,3 моль етанолу?
13,8 г
13,8
46 г/моль
46
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Яка маса етанолу в розчині масою 200 г з масовою часткою 46%?
92г
92
29
46 г/моль
Answer explanation
W=m(реч)/m(розч)*100℅
m(реч)=m( розч)*W/100%
m(реч)=200г*0.46=92г
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Вибери вірне завершення реівняня 2 CH3OH + 2 Na →
2 CH3ONa + H2
CH3ONa + H
2CH3ONaH2
2 CH4OН + Na2
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Виьери вірне закінчення рівняння C2H5OH + 3 O2 →
CO + H2O
2 CO2 + 3 H2O
2 CO2 + 3 H2
C4H6O5
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