Chemical Behaviours

Which metal shows rapid bubbling with a slow start when reacting with dilute acids?

• Zinc

• Aluminum

• Copper

• Silver

What is produced when metals react with acids?

• Oxygen gas

• Nitrogen gas

• Hydrogen gas

• Carbon dioxide

What happens to metals when they react with acids?

• They become stronger

• They corrode

• They change color

• They become magnetic

Which condition is likely to increase the risk of explosion in a confined space?

• Presence of oxygen

• Presence of hydrogen gas

• Presence of nitrogen

• Presence of carbon dioxide

Which process involves using acids or alkalis?

• Electroplating

• Galvanic protection

• Chemical etching

• Thermal insulation

What is the role of galvanic protection in engineering?

• To improve aesthetics

• To protect metal parts from corrosion

• To create features on metal surfaces

• To increase electrical conductivity

What is the role of an electrolyte in a simple cell?

• To conduct electricity

• To separate the electrodes

• To insulate the cell

• To provide energy

Which metal in a simple cell is more reactive?

• Both are equally reactive

• The one connected to the positive terminal

• The one connected to the negative terminal

• One metal is more reactive than the other

What are the main components of a lead acid battery?

• Lead dioxide, sulphuric acid, and lead

• Zinc, hydrochloric acid, and copper

• Nickel, sulfuric acid, and iron

• Lithium, phosphoric acid, and aluminum

What is a key feature of the chemical reaction in secondary cells?

• Irreversible

• Reversible

• Non-existent

• Explosive