Quiz on Fast and Slow Reactions

What is a characteristic of fast reactions, such as combustion?

• They do not involve oxygen.

• They release energy quickly.

• They require a catalyst to proceed.

• They occur slowly over time.

What is the chemical formula for magnesium oxide formed during combustion?

• Mg2O3

• MgO2

• Mg2O

• MgO

Why are fractions used in balancing combustion equations?

• To make the equation more complex.

• To balance the number of oxygen atoms.

• To simplify the equation.

• To avoid using whole numbers.

What is the product when potassium reacts with water?

• Potassium chloride

• Potassium hydroxide

• Potassium sulfate

• Potassium oxide

Which gas is released when reactive metals react with water?

• Carbon dioxide

• Hydrogen

• Nitrogen

• Oxygen

What is the chemical name for limestone?

• Calcium chloride

• Calcium oxide

• Calcium carbonate

• Calcium sulfate

What are the products of the reaction between calcium carbonate and sulfuric acid?

• Calcium chloride and water

• Calcium sulfate, water, and carbon dioxide

• Calcium oxide and carbon dioxide

• Calcium nitrate and water

What is a key feature of ionic precipitation reactions?

• They produce a gas.

• They require a catalyst.

• They occur slowly.

• They form a solid precipitate.

What is the solid product formed when silver nitrate reacts with hydrochloric acid?

• Silver chloride

• Silver sulfate

• Silver oxide

• Silver carbonate

In ionic precipitation reactions, what must be true about the reactants?

• They must be liquid.

• They must be gaseous.

• They must be aqueous.

• They must be solid.