Question

Name a non-metal which is in liquid state at room temperature from the given options:
A. Chlorine
B. Bromine
C. Iodine
D. Astatine

Answer 1

It is an element with atomic number 35 and third lightest halogen. It is fuming red brown liquid at room temperature. It is highly reactive and so that does not occur free in nature. It is used as a flame retardant. Simple salts are used as anticonvulsants in both veterinary and human medicine.

Complete step-by-step answer: Bromine is the third lightest halogen having atomic number 35, being a nonmetal in group 17 of periodic table.
It is fuming red brown liquid at room temperature and evaporates readily to form a similar colored gas.
Its properties are similar to the properties of chlorine and iodine, it has been behaving as an intermediate between chlorine and iodine (that is two neighbouring halogen).
As it belongs to the halogen family, it has one electron less to be a full octet, and is hence a strong oxidising agent, and thus reacts with many elements in order to complete its outer shell. According to periodic trends, it is intermediate in electronegativity between chlorine and iodine as it is less reactive than chlorine and more reactive than iodine. It is also a weaker oxidising agent than chlorine, but a stronger oxidizing agent than iodine.

So, option B is correct.

Note: Bromine is less abundant in the crust as compared to fluorine or chlorine. It is significantly more abundant in the oceans and resulting from long-term leaching.
Bromine is also used as flame retardants called brominated flame retardants. Hydrobromic acid produces when brominated material burns. It interferes in the radical chain reaction of the oxidation of fire.