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WorksheetsGrade 9 online quiz
Total questions: 8
Worksheet time: 8mins
Which of the liquids given below is a non electrolyte?
Sodium Chloride solution
Slightly acidified water
Copper Sulphate solution
Distilled water
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
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
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
The solution that can be used as the electrolyte when gold plating a silver ornament
Gold Cyanide
Silver Nitrate
Copper sulphate
Slightly acidified water.
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.
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
You are required to coat a silver bangle with gold. Which of the following set of substances is most suitable for it?
A silver rod, a very dilute solution of a silver salt
A gold rod, a very dilute solution of a silver salt
A gold rod, a very dilute solution of a gold salt
A gold rod, a concentrated solution of a gold salt
