Question

Solve the following crossword puzzle.

Across

1. salt used as an antacid

5. acid and base react to form

6. an acid known as 'king of chemicals'.

Down

2. a weak acid used in cold drinks.

3. an organic acid found in tomatoes.

4. man-made indicator.

Answer 1

1. Salt used as an antacid - Sodium bicarbonate$\left({\mathrm{NaHCO}}_3\right)$.

It is a mild basic salt that is used to cure acidity caused by hydrochloric acid in the stomach.

2. A weak acid used in cold drinks - Carbonic acid$\left({\mathrm{H}}_2{\mathrm{CO}}_3\right)$.

When carbon dioxide is dissolved in water it forms a mild acid that is carbonic acid.

3. An organic acid found in tomatoes - oxalic acid

Oxalic acid is found in tomatoes.

4. Man-made indicator - Methyl orange

Methyl orange is a man-made indicator.

5. Acid and base react to form - Salt

Salt - The chemical compound formed by a reaction of an acid and a base is called salt.

6. An acid known as ‘king of chemicals’ - Sulphuric acid$\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$

Since sulphuric acid is used in many industrial processes it is called the ‘king of chemicals’.