Chemistry 0620 · IGCSE · Simple molecules and covalent bonds

Simple molecules and covalent bonds — practice question

Compound X has a melting point of $71^\circ\text{C}$ and a boiling point of $375^\circ\text{C}$. Which of the following statements about X is correct?

  • AIt is a liquid at $52^\circ\text{C}$ and a gas at $175^\circ\text{C}$.
  • BIt is a liquid at $69^\circ\text{C}$ and a gas at $380^\circ\text{C}$.
  • CIt is a liquid at $75^\circ\text{C}$ and a gas at $350^\circ\text{C}$.
  • DIt is a liquid at $80^\circ\text{C}$ and a gas at $400^\circ\text{C}$.

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