Draw the structure of 3-methylbutanal.

4

Draw the structure of XeF₂ molecule

5

Write the IUPAC name of the following compound:(CH₃)₃CCH₂Br

7

Arrange the following compounds in an increasing order of their solubility in water:

C₆H₅NH₂, (C₂H₅) ₂NH, C₂H₅NH₂

8

What are biodegradable polymers?