C201 Acids and Alkalis

What is the effect of strong alkalis on skin?

• They dissolve skin to form soap
• They turn skin red
• They make skin slippery
• They make skin taste bitter

Which acid is found in lemons and oranges?

• Nitric acid
• Citric acid
• Sulfuric acid
• Hydrochloric acid

Which alkali is used in soap production?

• Sodium hydroxide
• Potassium hydroxide
• Calcium hydroxide
• Ammonia

Which of the following is NOT a property of alkalis?

• Taste bitter
• React with certain metals to produce hydrogen gas
• Turn red litmus paper blue
• They all contain oxygen

What is the effect of diluting acids with water?

• It makes them taste sweeter
• It makes them more dangerous
• It makes them less dangerous
• It makes them turn blue litmus paper red

What is the reaction called when acids and alkalis are mixed together?

• Neutralization
• Combustion
• Oxidation
• Reduction

What is the chemical opposite of acids?

• Noble gases
• Oxides
• Salts
• Alkalis

What is the use of sulfuric acid?

• Cleaning and removing stains
• Soap production
• Food preparation
• Batteries

What are the properties of alkalis?

• They taste sour
• They turn blue litmus paper red
• They feel slippery
• They react with certain metals to produce hydrogen gas

Which safety precaution should be taken when working with acids?

• Wearing sandals
• Wearing safety goggles
• Wearing a hat
• Wearing gloves