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

Question

Which of he following dissolves in hot conc. NaOH solution? (A) Fe (B) Zn (C) Cu (D) Ag

Tardigrade Admin · Accepted Answer

Zinc is quite reactive metal. It dissolves in excess of hot NaOH to give sodium zincate. Zn +2 NaOH longrightarrow underset textsodium zincateNa 2 ZnO 2+ H 2 uparrow

Q. Which of he following dissolves in hot conc. $N a O H$ solution?

Fe

Zn

Cu

Ag

Zinc is quite reactive metal. It dissolves in excess of hot $N a O H$ to give sodium zincate.
$Z n + 2 N a O H ⟶ sodium zincate N a_{2} Z n O_{2} + H_{2} ↑$

Q. Which of he following dissolves in hot conc. NaOH solution?

Fe

Zn

Cu

Ag

Zinc is quite reactive metal. It dissolves in excess of hot NaOH to give sodium zincate. Zn+2NaOH⟶sodium zincateNa2​ZnO2​+H2​↑​

Q. Which of he following dissolves in hot conc. $N a O H$ solution?

Zinc is quite reactive metal. It dissolves in excess of hot $N a O H$ to give sodium zincate.
$Z n + 2 N a O H ⟶ sodium zincate N a_{2} Z n O_{2} + H_{2} ↑$