Question

HBr reacts fastest with:
1-2 Methyl-propan-2 -ol
2-propan-1-ol
3-propan-2-ol
4-2Methyl propan-1-ol

Answer 1

Explanation:

HBr reacts fastest with:

1) 2-Methyl-propan-2-ol ✔

2) propan-1-ol

3) propan-2-ol

4) 2-Methyl propan-1-ol

Explaination :-

HBr reacts fastly with 2-methyl-propan-2-ol because it is an 3° alcohol and it reacts fastly with HBr to form 2-methyl-2-bromo propane.

Chemical equation :-

CH3C(CH3)(OH)CH3 + HBr → CH3C(CH3)(Br)CH3 + H2O

(Refer to the attachment.)

Additional information :-

Physical state :-

• At room temperature, lower alcohols are colourless liquids with distinct smell and burning taste.
• The higher member are colourless, odourless, waxy solid.

Boiling point :-

• The boiling point of alcohol and phenols increase with increase in number of C-atoms.

Reason -

• Due to increase in van der waals' force.

Solubility :-

• The solubility of alcohols and phenols in water is due to their ability to form H-bonds with water molecules