
ELECTROLIZA
Authored by IRINA MARIN
Science
9th Grade
Used 1+ times

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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Electroliza constă în totalitatea proceselor care au loc la trecerea curentului electric prin soluția sau prin topitura unui electrolit
A
F
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se consideră ecuațiile reacţiilor:
2NaCl(topitură) electroliză → 2A + Cl2
2A + 2H2O → 2B + H2.
Literele A şi B corespund substanţelor:
A - sodiu, B - oxid de sodiu
A - sodiu, B - hidrură de sodiu
A - sodiu, B - hidroxid de sodiu
sodiu, B - peroxid de sodiu
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În timpul electrolizei soluției apoase de sulfat de cupru:
se degajă hidrogen
se formează acid sulfhidric
precipită hidroxidul de cupru
se depune cupru
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În procesul de electroliză:
anodul este electrodul pozitiv
catodul este electrodul pozitiv
la anod are loc reducerea
la catod are loc oxidarea
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La electroliza topiturii de clorură de sodiu se obţin
hidrogen, clor şi hidroxid de sodiu
clor şi hidroxid de sodiu
sodiu şi clor
sodiu şi hidrogen
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În procesul de electroliză a clorurii de sodiu în stare topită:
la catod are loc oxidare
la anod are loc reducere
la catod se obţine sodiu
la anod se obţine sodiu
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La electroliza soluției de iodură de potasiu, iodul se obține la anodul celulei electrolitice
A
F
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