Exploring Types of Chemical Reactions

What is the appearance of magnesium oxide?

• Liquid

• Gas

• White powdery substance

• Solid metal

What happens to the diameter of the copper wire in silver nitrate?

• It disappears

• It shrinks

• It remains the same

• It expands

What are the products of the reaction involving silver nitrate?

• Potassium iodide

• Magnesium oxide

• Copper crystals

• Silver crystals

What happens when lead nitrate reacts with potassium iodide?

• Formation of silver crystals

• Emission of gas

• Instant color change

• Decrease in temperature

What is the purpose of using a Bunsen burner in the experiment?

• To cool down the reaction

• To measure temperature

• To ignite the hydrogen

• To heat and cause movement of powder

What indicates the presence of copper ions in a solution?

• Red color

• Clear liquid

• Light blue color

• Fizzing

What is the result of adding sodium hydroxide to the solution?

• Color change to red

• Decrease in volume

• Emission of smoke

• Formation of a solid

What gas is formed in the reaction with hydrochloric acid?

• Nitrogen

• Oxygen

• Hydrogen

• Carbon dioxide

What is the state of zinc chloride after the reaction?

• Gas

• Solid

• Aqueous

• Powder

Why is hydrogen not visible during the experiment?

• It dissolves in water

• It reacts immediately with air

• It is colorless and odorless

• It is absorbed by the container