Representation of Organic Compounds

Q.

Give condensed and bond line structural formulas and identify the functional group(s) present, if any, for:

(a)2, 2, 4-Trimethylpentane
(b)2-Hydroxy-1, 2, 3-propanetricarboxylic acid
(c) Hexanedial

Q.

Which of the following orders regarding relative stability of free radicals is correct?

Q. Which of the following is incorrect for stability of structures.

1. 
2. 
3. 
4. 

Q. Write the structure of the following alkane.
$2-Methylbuta-1,3-diene$.