S2 Acids and Bases

What color does litmus paper turn when it is dipped in an acid?

• Blue

• Red

• Green

• Purple

Which of the following is a household base?

• Vinegar

• Lemon juice

• Baking soda

• Hydrochloric acid

What pH value do neutral solutions have?

• Less than 7

• More than 7

• Equal to 7

• Equal to 8

What is the main purpose of a universal indicator?

• To increase acidity

• To decrease alkalinity

• To measure pH level

• To create a chemical reaction

Which of the following is not a laboratory acid?

• Sulfuric acid

• Sodium hydroxide

• Hydrochloric acid

• None of the above

What is Acid Rain formed from?

• Burning of fossil fuels

• Evaporation of sea water

• Decomposition of plants

• Lightning in clouds

Which of the following is NOT a way to reduce the amount of acid rain?

• Use renewable sources of energy

• Use catalytic converters in cars

• Increase the use of fossil fuels

• Plant more trees

What can acid rain damage?

• Plastic materials

• Stone buildings, bridges, and trees

• Metal surfaces only

• Human skin directly

What happens when an acid and a base are mixed together?

• They form a gas

• They dissolve

• They neutralize each other

• They explode

What can be used to neutralize stomach acid?

• Cold water

• Sugar syrup

• Indigestion tablets

• Salt solution