Q15 / 160 · AP EAMCET 2023 (15 May Shift 1) · Chemistry

Which of the following alloys are correctly matched with their uses? (i) $\mathrm{Li} / \mathrm{Mg}$ armour plates (ii) $\mathrm{Cu} / \mathrm{Be}$ high strength springs (iii) $\mathrm{Mg} / \mathrm{Al}$ aircraft construction

  • A
    i, ii only
  • B
    ii, iii only
  • C
    i, iii only
  • Correct answer
    D
    i, ii, iii

Solution

$\mathrm{Li}$ and $\mathrm{Mg}$ being hard metals are used as an alloy in armour plates. $\mathrm{Cu}-\mathrm{Be}$ alloy is used in high-strength springs due to ductility of $\mathrm{Cu}$. $\mathrm{Mg}-\mathrm{Al}$ alloy is used in aircraft construction as $\mathrm{Al}$ is a versatile metal.

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

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