Tooth decay starts when the pH of the mouth is:

A farmer finds that the soil in his field is too acidic. Which of the following should he add to the soil to adjust its pH?

A student adds a few drops of a dilute acid to a test tube containing egg shells. What would they observe?

What is the common name for the compound NaHCO3?

Clove oil is an example of which type of indicator?

Which option correctly represents the number of water molecules of crystallisation in washing soda and Plaster of Paris respectively?

What colour does methyl orange indicator turn in an acidic solution?

Why do HCl and HNO3 show acidic characters in aqueous solutions, while solutions of glucose (C6H12O6) and alcohol (C2H5OH) do not?

An aqueous solution of which of the following salts will be acidic in nature?

Which of the following phenomena occurs when a small amount of acid is added to water?

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains:

What is the chemical name and formula of washing soda?

Which of the following is commonly used as an antacid to treat indigestion?

What is the chemical formula for bleaching powder?

Which of the following statements is true for acids?

Which gas is produced when an acid reacts with a metal carbonate?

A solution turns red litmus paper blue. What is the likely pH of this solution?

What are the three main products of the chlor-alkali process?

Plaster of Paris is obtained by carefully heating which of the following compounds?