Chemistry 0620 · IGCSE · Formulae

Formulae — practice question

The incomplete equation for photosynthesis is given below. $w\text{CO}_2 + x\text{H}_2\text{O} \rightarrow \text{P} + y\text{O}_2$ Compound P is one of the products formed in the reaction. Which row states the values of $w$, $x$ and $y$ and also gives the empirical formula of compound P?

  • A$w$, $x$ and $y$ are all the same; $\text{CH}_2\text{O}$
  • B$w$, $x$ and $y$ are all the same; $\text{C}_6\text{H}_{12}\text{O}_6$
  • C$w$ and $x$ are the same and both are greater than $y$; $\text{CH}_2\text{O}$
  • D$w$ and $x$ are the same and both are greater than $y$; $\text{C}_6\text{H}_{12}\text{O}_6$

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