Question

A soft metal $\left(A\right)$ gives the violet flame test. When burnt in $O_2$, $\left(A\right)$ gives chrome yellow powder $\left(B\right)$ which on reaction with water gives alkaline solution $\left(C\right)$ and $O_2$. Identify the metal.

• A. $Na$
• B. $Mg$
• C. $K$
• D. $Ca$

Answer 1

The correct option is C $K$

In group 1 and group 2 metals , $K$ gives the violet flame test.

$K+O_2\to K{O}_2\to KOH+O_2$