What is the molecular formula of allyl bromide?
What is the molecular formula of allyl bromide?

1.\,\,{{C}_{2}}{{H}_{4}}Br

2.\,\,{{C}_{2}}{{H}_{3}}Br

3.\,\,{{C}_{3}}{{H}_{5}}Br

4.\,\,{{C}_{3}}{{H}_{6}}Br

Solution:  3.\,\,{{C}_{3}}{{H}_{5}}Br

The\text{ }Allyl\text{ }group\text{ }is~

CH2=CH-CH2-\text{ }

~So\text{ }the\text{ }Allyl\text{ }bromide\text{ }is:

~CH2=CH-CH2-Br