%%

Gaokao Chemistry Practice Question

工业上电解熔融 $\mathrm{Al}_{2} \mathrm{O}_{3}$ 和冰晶石 $\left(\mathrm{Na}_{3} \mathrm{AlF}_{6}\right)$ 的混合物可制得铝。下列说法正确的是

  1. A.半径大小: $\mathrm{r}\left(\mathrm{Al}^{3+}\right)<\mathrm{r}\left(\mathrm{Na}^{+}\right)$
  2. B.电负性大小: $\chi(\mathrm{F})<\chi(\mathrm{O})$
  3. C.电离能大小: $\mathrm{I}_{1}(\mathrm{O})<\mathrm{I}_{1}(\mathrm{Na})$
  4. D.碱性强弱: $\mathrm{NaOH}<\mathrm{Al}(\mathrm{OH})_{3}$

Want to know if you got it right?

Answer this and thousands more real Gaokao previous-year questions free, get graded instantly, and climb the global ranked leaderboard.

Practice Gaokao free →

More Gaokao Chemistry questions