Nitrogen dioxide, $\text{NO}_2$, is a dark brown gas which breaks down as shown in the equation. $2\text{NO}_2(\text{g}) \rightleftharpoons 2\text{NO}(\text{g}) + \text{O}_2(\text{g})$ dark brown colourless A glass flask contains a mixture of these three gases. The mixture appears pale brown. Additional oxygen is pushed into the flask. Which colour change is observed in the mixture?
- AIt becomes a darker brown.
- BIt becomes a paler brown.
- CIt turns colourless.
- DThere is no change.