Classification

Q.
IUPAC name of given compound is:

1. But-2-ene-2, 3-diol
2. Pent-2-ene-2, 3-diol
3. Pent-3-ene-3, 4-diol
4. 2-Methylbut-2-ene-2, 3-diol

Q. Which one of the following compounds is an allylic halide?

1. 
2. 
3. 
4. 

Q. Number of functional isomer(s) of CH₃COOH is/are?

1. 4
2. 3
3. 2
4. 1