Acids, Bases and Salts - Part 1 | Assessment | English | Grade 7

Substances which are bitter in taste and feel soapy on touching are known as _____ .

• Acids

• Bases

• Salts

• None of these

Answer explanation

Substances which are bitter in taste and feel soapy on touching are known as bases.

Substances used to test whether a substance is acidic or basic is known as _____.

• Indicator

• Salt

Answer explanation

Substances used to test whether a substance is acidic or basic is known as indicator.

Foods which are sweet in test contains Acids.

• TRUE

• FALSE

Answer explanation

Foods which are sweet in test neither contain acid nor base.

Which of the following is not example of acid? Vinegar, orange, Wine. sugar

• vinegar

• orange

• curd

• sugar

Answer explanation

Sugar is not an example of acid whereas vinegar, orange and wine are examples of acid.

The correct statement is:

• most acids dissolve in water but most bases do not dissolve in water

• most acids do not dissolve in water but most bases dissolve in water

• all of the acids and bases dissolve in water

• acids and bases do not dissolve in water

Answer explanation

The correct statement is most acids dissolve in water but most bases do not dissolve in water.