Q62 / 160 · JIPMER 2004 · Chemistry

Which of the following dissolves in hot conc. NaOH solution?

  • A
    Fe
  • Correct answer
    B
    Zn
  • C
    Cu
  • D
    Ag

Solution

Zinc is quite reactive metal. It dissolves in excess of hot NaOH to give sodium zincate. $\mathrm{Zn}+2 \mathrm{NaOH} \longrightarrow \underset{\text { sodium zincate }}{\mathrm{Na}_2 \mathrm{ZnO}_2+\mathrm{H}_2 \uparrow}$

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

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