Properties of Bases

What is a base according to the passage?

• A substance that produces hydroxide ions when dissolved in water

• A substance that donates H+ to a base

• A substance that is always acidic

• A substance that is only found in cleaning products

Which of the following is an example of a basic material mentioned in the passage?

• Lemon juice

• Vinegar

• Baking soda

• Orange juice

What happens to red litmus paper when it comes into contact with a base?

• It turns blue

• It turns red

• It remains unchanged

• It dissolves

Why should taste and touch never be used to test for the presence of a base?

• Because bases are corrosive and can cause chemical burns

• Because bases have a sweet taste

• Because bases are not reactive

• Because bases are always in liquid form

What is the role of sodium hydroxide in the paper industry according to the passage?

• To separate fibers of cellulose from wood pulp

• To add color to the paper

• To make the paper waterproof

• To add fragrance to the paper

According to the passage, what are two different ways to define a base?