Chemical Effects of Electric Current Quiz

Why is it dangerous to touch an electrical appliance with wet hands?

• Because wet hands can cause a short circuit

• Because wet hands can cause a fire

• Because wet hands can damage the electrical appliance

• Because wet hands can cause an electric shock

What are good conductors of electricity?

• Tap water and vegetable oil

• Lemon juice and vinegar

• Copper and aluminium

• Rubber, plastic, and wood

What happens when an electric current passes through a conducting solution?

• Gas bubbles are formed

• The solution changes color

• The solution becomes hot

• Chemical reactions occur

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the process of depositing a layer of metal on another material by means of electricity called?

• Electroplating

• Electromagnetism

• Electrolysis

• Electrostatics

Tags

NGSS.HS-PS3-5

What is the purpose of electroplating?

• To make objects shiny

• To protect objects from corrosion

• To make objects stronger

• To make objects conduct electricity

What happens when current is passed through copper sulphate solution?

• Copper gets deposited on the positive electrode

• Copper gets dissolved in the solution

• Copper gets deposited on the negative electrode

• Copper gets converted into sulphate

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the purpose of shutting off the main electrical supply during a fire?

• To save electricity

• To prevent electrocution

• To protect the electrical appliances

• To prevent the fire from spreading

Why does the compass needle deflect more in seawater compared to drinking water?

• Seawater has a higher salt content

• Seawater has a higher temperature

• Seawater is a better conductor of electricity

• Seawater has a higher pH level

Is it safe for an electrician to carry out electrical repairs outdoors during heavy downpour?

• Yes, because water does not conduct electricity

• Yes, because the electrician is wearing rubber gloves

• No, because water can cause a short circuit

• No, because the electrician might slip and fall

What objects are commonly electroplated?

• Bicycles and car parts

• Kitchen utensils and bathroom fixtures

• Jewelry and ornaments

• All of the above