Which formula equation shOws a reversible reaction? O 2Na + F, → 2NaF
O CaCO, → CaO+ CO,
O NH, Cl(s) → NH,(g) + HCIg)
O 2H, O,(ag) →2H, O) + O, (e)

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but