Types of Reactions

Types of Reactions

Multiple Choice

What does incomplete combustion produce that complete combustion doesn't?

• Carbon Monoxide

• Water

• Heat

• Carbon Dioxide

Multiple Choice

What are the products of combustion?

• Hydrogen + oxygen

• Carbon dioxide + water

• Carbon dioxide + hydrogen

• Carbon + water

Multiple Choice

Why do we burn a fuel?

• To have fun

• To release energy

• To lose energy

• To produce carbon dioxide

Multiple Choice

Another term for burning is

• Fire triangle
• Magnesium oxide
• Combustion
• Bustion

Multiple Choice

The condition which are required for combustion to take place are:

• fuel
• ignition temperature
• oxygen
• all of these

Multiple Choice

The rusting of iron is an example of

• a reduction reaction.
• an oxidation reaction.
• a reaction of iron with water.
• a reaction that dissolves iron.

Multiple Choice

Which of the following is an example of an oxidation reaction?

• Ca  +   O₂ --> CaO
• Na₂O  + H₂O --> NaOH
• Fe₂O₃   + CO --> Fe   +  CO₂
• All of the choices are oxidation reactions.

Multiple Choice

Which of the following reactions produces calcium oxide?

• calcium and oxide
• calcium and water
• calcium and air
• calcium and oxygen

Multiple Choice

Which of the following defines oxidation?

• A chemical reaction where a substance gains oxygen.
• A chemical reaction where a substance loses oxygen.
• A chemical reaction where a substance loses a metal.
• A chemical reaction where a substance gains a metal.

Multiple Choice

How are metal oxides formed?

• When metals react with oxide.
• When metals react with water.
• When metals react with air.
• When metals react with oxygen.

Multiple Choice

Which of the following is the product of the reaction of aluminium and oxygen?

• aluminium oxide.
• metal oxide
• aluminium ore
• aluminium and oxygen

Multiple Choice

In this chemical reaction, which is the product/s?

Magnesium + Oxygen --> Magnesium oxide

• magnesium

• magnesium and oxygen

• magnesium oxide

• oxygen

Multiple Choice

Why does thermal decomposition need heat energy

• to make magic

• to break bonds

• to make water

• to work as a catalyst

Multiple Choice

______________ (+ heat) → zinc oxide + carbon dioxide

• zinc carbonate

• zinc oxide

• zinc dioxide

• zinc hydrogen carbonate

Multiple Choice

metal hydroxide (+ heat) → ____________ + _________

• metal carbonate + water

• metal oxide + carbon dioxide

• carbon dioxide + water

• metal oxide + water

Multiple Choice

What does the "thermal" in thermal decomposition mean?

• sulfur

• catalyst

• heat

• oven

Multiple Choice

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

• The solution at the end is acidic

• The reaction is reversible

• The reaction is exothermic

• The reaction is endothermic

Multiple Choice

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

• Endothermic

• Decomposition

• Exothermic

• Indothermic

Multiple Choice

What term is given to a reaction which transfers heat energy to the surroundings?

• Endothermic

• Reversible

• Exothermic

• Exotermic