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

Answer 2

Zn  +  NaOH $\longrightarrow$Na2ZnO2  +  H2 ­

Sodium zincate