Chemical Reactions Quiz

When an acid reacts with a metal, what gas is usually produced?

• Hydrogen gas

• Carbon dioxide gas

• Nitrogen gas

• Oxygen gas

Balance the following chemical equation: HCl + Mg -> MgCl2 + H2

• 2HCl + Mg -> MgCl2 + H2

• H2 + MgCl2 -> Mg + 2HCl

• HCl + MgCl2 -> Mg + H2

• 2HCl + 2Mg -> 2MgCl2 + H2

What happens when an acid reacts with an alkali?

• No reaction takes place

• Neutralization reaction occurs

• Combustion reaction occurs

• Formation of a gas

Fill in the blank: Acid + Alkali -> _______ + Water

• Alkali

• Acid

• Salt

• Water + Salt

How can neutralisation be applied in acidic soil?

• Mixing in lemon juice to lower the pH level

• Adding a base such as lime (calcium hydroxide) to raise the pH level and reduce acidity.

• Applying salt to neutralize the soil

• Adding vinegar to increase acidity

What is the product when an acid reacts with a carbonate?

• Salt, water, and oxygen

• Carbon dioxide, water, and salt

• Acid, salt, and water

• Salt, water, and carbon dioxide

Balance the following chemical equation: H2SO4 + CaCO3 -> CaSO4 + CO2 + H2O

• 1H2SO4 + 1CaCO3 -> 1CaSO4 + 2CO2 + 1H2O

• 2H2SO4 + 1CaCO3 -> 1CaSO4 + 1CO2 + 1H2O

• 1H2SO4 + 1CaCO3 -> 1CaSO4 + 1CO2 + 1H2O

• 1H2SO4 + 1CaCO3 -> 1CaSO4 + 1CO2 + 2H2O

What is the general formula for the reaction between an acid and a metal carbonate?

• Acid + Metal Carbonate -> Salt + Oxygen

• Acid + Metal Carbonate -> Salt + Water

• Acid + Metal Carbonate -> Salt + Carbon Dioxide + Water

• Acid + Metal Carbonate -> Salt + Hydrogen

Fill in the blank: Acid + Metal Carbonate -> _______ + Water + Carbon Dioxide

• Sugar

• Salt

• Hydrogen

• Oxygen