Identify the green-yellowish gas that is used as a disinfecting agent. identify the green-yellowish gas that is used as a disinfecting agent. iodine bromine fluorine chlorine

The answer is chlorine

That is chlorine is the green-yellowish gas that is used as a disinfecting agent.

Among the options, iodine is a solid ,bromine is liquid while fluorine and chlorine are gases.

Chlorine is greenish yellow colored gas while fluorine is pale yellow, chlorine is used as a disinfecting agent and oxidizing agent as well.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.