Reactions of Acid and Base

Which of the following is an example of base?

• Vinegar

• Milk

• Blood

• Rain water

The name of chemicals used to know the pH of substance is...

• Locating agent

• Indicators

• Colorings

• pH revealers

Which compound from below can't react with acid?

• Acids

• Basic oxides

• Metal carbonates

• Metals

What is the gas produced from the reaction between acids and metals?

• Oxygen gas

• Hydrogen gas

• Carbon dioxide

• Water

A compound turns litmus paper into blue and universal paper into purple. By that information, what's the possible pH of that compound?

• 0

• 4

• 7

• 12

The pH of vinegar is around 4 while the pH of lemon is around 2. How many times more acidic is lemon compared to vinegar?

• 2

• 10

• 20

• 100

Aluminium oxide and zinc oxide can react with HCl and NaOH. These kind of substance are also known as ... oxides

• Acidic

• Basic

• Neutral

• Amphoteric

Ammonium salts can react with base to release ammonia gas. By this information, what is the acidity of ammonium salt?

• Acid

• Base

• Amphoteric

• Neutral

When we dissolve chalk in acid, bubbles are formed. When we put a wet litmus paper above the glass, the color becomes red. What is the gas produced?

• Hydrogen

• Oxygen

• Ammonia

• Carbon dioxide

Which one from below is NOT a property of acid?

• Slippery

• Taste sour

• Corrosive

• Neutralize base