CHEMISTRY UNIT TEST _ REACTIVITY

Which of the following is arranged according increasing reactivity?

• Mg < Na < K

• Mg > Na > K

• Na > Mg > K

• Mg < K < Na

Which of the following does not react with water?

• zinc

• magnesium
• lead
• calcium

Which of the following the most reactive in dilute acid

• magnesium
• calcium
• aluminum
• zinc

What is made when magnesium reacts with hydrochloric acid?

• magnesium nitrate and hydrogen gas
• magnesium sulfate and hydrogen gas
• magnesium oxide and oxygen gas
• magnesium chloride and hydrogen gas

When a metal reacts with oxygen gas, the product is ...

• metal hydroxide
• metal oxide
• metal oxide and oxygen
• metal hydroxide and hydrogen gas

Which one of the following metals reacts most vigorously with cold water?

• Sodium
• Magnesium
• Copper
• Zinc

Which metal is more reactive than calcium?

• magnesium
• potassium
• silver
• aluminum

What are the reactants for the reaction of metal with water?
Metal + water ---> metal hydroxide + hydrogen

• Metal
• Water
• Metal and water
• Metal hydroxide and hydrogen

How can you tell that a metal is reacting with water?

• Colour change
• Bright light
• Fizzing
• It gets colder

How can you test to show that when a metal reacts with water, hydrogen gas is produced?

• Relights a glowing splint
• A lit splint produces a squeaky pop
• Puts out a burning splint
• Is cold to the touch