Question

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

• A. As
• B. Zn
• C. Mg
• D. Fe

Answer 1

Answer: (B)

Zn

Answer 2

Zn displaces hydrogen from the boiling solution of NaOH.

$Zn + 2NaOH + 2H_{2}O \rightarrow Na_{2}\lbrack Zn(OH)_{4}\rbrack + H_{2} \uparrow$