
Grade 9 online quiz
Authored by Indika Science
Science
9th Grade
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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the liquids given below is a non electrolyte?
Sodium Chloride solution
Slightly acidified water
Copper Sulphate solution
Distilled water
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The action not taking place when an electric current is passed for a short time through the set up shown in the diagram.
Deflection in the ammeter
Copper colour forming on negative electrode
Evolution of gas at positive electrode
Copper Sulphate solution turns dark blue
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Action that should not be done when electroplating
Using the metal that is plated as the positive electrode
Using the ornament that is plated as the negative electrode
Electrolysing a solution of a salt of the metal that is electroplated.
Elecrtrolyte used should be concentrated salt solution
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Electricity is not conduct through a sodium Chloride crystals because
It is not an ionic compound
There is no mobile ions
It is not a colourd salt
It is easily soluble in water
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The solution that can be used as the electrolyte when gold plating a silver ornament
Gold Cyanide
Silver Nitrate
Copper sulphate
Slightly acidified water.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Select the correct statement, from the following statements.
Solid sodium chloride (NaCl) is an electrical conductor
Fused sodium chloride (NaCl) does not conduct electricity
An aqueous solution of sodium chloride (NaCl) conducts electricity
Solid sodium chloride (NaCl) consists of mobile ions.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statement is correct about electroplating?
To make a high quality electroplating, the concentration of the electrolyte must be high
To electroplate a copper ring with silver, the copper ring must be kept as the positive electrode,
To electroplate a copper ring with silver, a copper salt must be taken as the electrolyte
When electroplating a copper ring with silver, the positive electrode erodes gradually
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