For reaction 1, a student records the initial rate at which $\text{CO}_2(g)$ is formed when $\text{CuCO}_3(s)$ is introduced into $50\,\text{cm}^3$ of $0.1\,\text{mol dm}^{-3}$ $\text{HNO}_3(aq)$. For reaction 2, the student carries out the same experiment again, but this time with $50\,\text{cm}^3$ of $0.5\,\text{mol dm}^{-3}$ $\text{HNO}_3(aq)$ and the same mass of $\text{CuCO}_3(s)$. In both reaction 1 and reaction 2, the acid is in excess and samples of the same $\text{CuCO}_3$ powder are used. Which row gives the correct answer?
- ARate of reaction 1 / rate of reaction 2: greater than 1; Initial number of effective collisions in reaction 1 per second / reaction 2 per second: greater than 1
- BRate of reaction 1 / rate of reaction 2: greater than 1; Initial number of effective collisions in reaction 1 per second / reaction 2 per second: less than 1
- CRate of reaction 1 / rate of reaction 2: less than 1; Initial number of effective collisions in reaction 1 per second / reaction 2 per second: greater than 1
- DRate of reaction 1 / rate of reaction 2: less than 1; Initial number of effective collisions in reaction 1 per second / reaction 2 per second: less than 1