A substantial quantity of $\text{N}_2\text{O}(\text{g})$ breaks down into nitrogen gas and oxygen gas in the presence of a very small amount of gold foil catalyst. The gold foil offers a solid surface on which the catalysed reaction occurs. The graph plots the concentration of $\text{N}_2\text{O}(\text{g})$ against time while it decomposes. The graph is a straight line. Which row shows: • how the rate of reaction changes as $\text{N}_2\text{O}(\text{g})$ decomposes from $0$ to $10$ minutes • what happens to the rate of decomposition for the same amount and concentration of $\text{N}_2\text{O}(\text{g})$ if more gold foil catalyst is added?
- Anone; increases
- Bnone; none
- Cdecreases; increases
- Ddecreases; none