consider-two-identical-flasks-containing-different-gases-at-the-same-temperature

Question

Consider two identical clear flasks containing different gases at the same temperature (70 °C) and pressure. How can you differentiate bromine gas from helium gas under these conditions?

Accepted Answer

At 70 °C, bromine is a reddish brown gas while helium is colorless.

Answer

Bromine gas is greenish while helium gas is colorless.

Answer

At the same temperature (70 °C) and pressure, bromine gas is indistinguishable from helium.

Answer

At 70 °C, bromine gas appears very cloudy while helium gas is colorless.