
TEST
Authored by Phượng Nguyễn
Chemistry
3rd Grade
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is electrolysis?
Electrolysis is an oxidation-reduction process that occurs in the heart of the electrodes when a direct current passes through the molten electrolyte or electrolyte solution.
Electrolysis is the oxidation - reduction process that occurs at the electrode surface when alternating current passes through the molten electrolyte or electrolyte solution.
Electrolysis is an oxidation - reduction process that occurs at the electrode surface when a direct current passes through the molten electrolyte or electrolyte solution.
Electrolysis is an oxidation - reduction process that occurs at the electrode surface when there is no direct current passing through the molten electrolyte or the electrolyte solution.
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
When electrolysis saturated salt solution which has a membrane, which of the following phenomena occurs?
Oxygen gas is released at the cathode, chlorine gas is released at the anode
Hydrogen gas is released at the cathode, chlorine gas is released at the anode
Sodium metal escapes at the cathode, chlorine gas escapes at the anode
Javen solution is created in an electrolytic cell
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Fill in the missing words in the blanks:
Javen water is a substance ……., .... color, ... smell, … to be decomposed by light
bleached, white, shocking, hard
bleach, yellow, shocking, hard
bleached, yellow, shocking, easy
bleach, white, shocking, easy
4.
MULTIPLE CHOICE QUESTION
5 sec • 1 pt
Javel solution is a mixture consisting of two main components:
Salt NaClO and Na2SO4
Salt NaClO and CaCO3
Salt NaCl and NaNO3
Salt NaCl and NaClO
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which are two Stages of preparing javel solution by electrolysis of NaCl solution?
Stage 1: NaCl electrolyzes into NaOH caustic soda and releases Hydrogen and Chlorine gas
Stage 1: Chlorine gas escapes and reacts with NaOH solution to create Javel mixture
Stage 2: NaCl electrolyzes into NaOH caustic soda and releases Hydrogen and Chlorine gas
Stage 2: Chlorine gas escapes and reacts with NaOH solution to create Javel mixture
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Fill in the blanks with the names of the parts in the structure of the electrolytic cell
7.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Javel solution has strong detergent properties because
NaClO salt has strong oxidizing property
NaCl salt has strong reducing property
NaClO salt has strong reducing property
NaCl salt has strong oxidizing property
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