Which of these contain citric acid? 

Which of the following chemical compounds are used to improve our appearance?

Which chemist was recognised for his work to explain the behaviour of atoms? 

Food chemists who do research on the nature of soil required for the crop are called

Look at the following diagram and label the apparatuses numbered $1-4$. 

Draw the following: 

Different types of flasks. 

Draw the following: 

Different types of funnels.

You have to heat a chemical, say, potassium permanganate. In which tube will you prefer to heat it, a boiling tube or a test tube? Why? 

Delivery tubes are made from glass tubes and not from glass rods. Why?