Acids and Bases Quiz

Pure water has a pH of 7. Pure water _______.

• is a base

• is a neutral substance

• could be either an acid or a base

• is an acid

During your experiment on the acid-base indicator using camote tops extract, you have found out the color of camote tops extract changes from purple to pink when you add the vinegar. What does this indicate about the pH of vinegar?

• The vinegar is a basic solution

• The vinegar is an acidic solution.

• The vinegar is a neutral solution

• The vinegar dilutes the camote tops extract.

What pH range would you get for an Alkali?

• 0-6

• 5-8

• 8-14

• 6-9

Which of the following common household substances is basic?

• Lemon

• Vinegar

• Baking Soda

• Calamansi

What is the main purpose of an acid-base indicator in a science experiment?

• To add color to the solution

• To measure temperature changes

• To indicate the presence of acids or bases

• To create a pleasant smell

What are properties of acids?

• Bitter, slippery, ph above 7

• Sour, reacts with metals, ph below 7

• Sour, reacts with metals, ph above 7

• Bitter, ph of 7, does not react with metals

What are properties of an alkali?

• Slippery, bitter, does not react with metals, pH above 7.

• Slippery, bitter, reacts with metals, pH below 7.

• Sour, reacts with metals, pH below 7.

• Sour, reacts with metals, pH above 7.

Which of the following Statements are true about Acids?

• They are sour in taste and soapy to touch.

• They are bitter in taste.

• Acids are present in Oranges, Ant sting, Vinegar etc.

• Acids are present in Vinegar, Sugar, Soap etc.

How does the pH scale relate to the concept of acid-base indicators?

• The pH scale measures the temperature of a solution.

• The pH scale indicates the concentration of water in a solution.

• The pH scale quantifies the acidity or basicity of a solution.

• The pH scale determines the color of an acid-base indicator.

If a solution has a pH of 1.5, then the pH indicator would turn…

• Red

• Purple

• Blue

• Yellow