Question

The metal which displaces hydrogen from a boiling caustic soda solution is:

• A. $Mg$
• B. $Fe$
• C. $As$
• D. $Zn$

Answer 1

Answer: (D)

$Zn+NaOH\to \underset{\stackrel{\text{Sodium}}{\mathrm{zincate}}}{N{a}_{2}Zn{O}_2}+H_2\uparrow$