Q15 / 160 · TS EAMCET 2018 (05 May Shift 2) · Chemistry

Which pair of elements on combustion in air give superoxides?

  • A
    $L i, C s$
  • Correct answer
    B
    $K_1 R b$
  • C
    $L i, R b$
  • D
    $K_1$ Li

Solution

$\mathrm{K}$ and $\mathrm{Rb}$ in alkali metal on combustion in air give superoxides and form $\mathrm{KO}_2$ and $\mathrm{RbO}_2$ other alkali metals $\mathrm{Li}, \mathrm{K}$ and $\mathrm{Cs}$ produces oxides and peroxides.

Hence, the correct answer is option: 'B'.

Relevant Questions