Y8U5T3 - Metal Reactivity and Water

How can you tell which metal is more reactive with water?

• Observe its reaction with water
• Measure its density
• Test its electrical conductivity
• Check its color
• Smell its odor

What gas is commonly produced when metals react with water?

• Hydrogen gas
• Oxygen gas
• Carbon dioxide
• Nitrogen gas
• Helium gas

What are metal hydroxides and how are they formed during a metal-water reaction?

• Compounds formed when metals combine with water molecules
• Compounds formed when metals combine with oxygen
• Compounds formed when metals combine with nitrogen
• Compounds formed when metals combine with carbon dioxide
• Compounds formed when metals combine with hydrogen gas

Which metals are highly resistant to corrosion when exposed to rain and moisture?

• Aluminium and stainless steel
• Iron and copper
• Sodium and potassium
• Magnesium and zinc
• Silver and gold

Which metals can react violently with water, producing flames or explosions?

• Sodium and potassium
• Copper and silver
• Aluminium and stainless steel
• Iron and copper
• Magnesium and zinc

Which metal is less reactive and does not react with water?

• Copper
• Silver
• Sodium
• Potassium
• Magnesium

What happens when sodium reacts with water?

• It produces hydrogen gas and sodium hydroxide
• It produces oxygen gas and sodium chloride
• It produces carbon dioxide and sodium carbonate
• It produces nitrogen gas and sodium nitrate
• It produces helium gas and sodium fluoride

What happens when magnesium reacts with water?

• It produces magnesium hydroxide and hydrogen gas
• It produces oxygen gas and magnesium chloride
• It produces carbon dioxide and magnesium carbonate
• It produces nitrogen gas and magnesium nitrate
• It produces helium gas and magnesium fluoride

Which metals are more prone to corrosion and can rust or tarnish when exposed to water?

• Iron and copper
• Aluminium and stainless steel
• Sodium and potassium
• Magnesium and zinc
• Silver and gold

What determines the type of reaction that occurs when a metal reacts with water?

• The type of metal and the conditions of the reaction
• The color of the metal
• The density of the metal
• The boiling point of the metal
• The melting point of the metal