To which of the following metal salt solution when solution of caustic soda is added, a precipitate is obtained which dissolves on adding excess of caustic soda solution?

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

A ceratin compound (A) imperts a golden yellow flame and exhibits following reactions: a. When a concentrated solution of (A) is boiled with Zn power, hydrogen gas is evolved. b. When an aqueous solution of (A) is added to an precipitate is obtained, which dissolves in excess of solution (A). Identify (A) and give equations for reactions in (ii).

On addition of aqueous NaOH to a salt solution, a white gelatinous precipitate is formed, which dissolves in excess of alkali. The salt solution contains

Which of the following is commonly named as caustic soda ?

Which of the following precipitate(s) does /do not dissolve in excess of ammonia solution ?

When a KI solution is added to a metal nitrate, a black precipitate is produced which dissolves in an excess of KI to give an organge solution. The metal ion is: