Question

Which alkali metal emits blue color light in flame test?

• A. $Cs$
• B. $Li$
• C. $Na$
• D. $K$

Answer 1

Answer: (A)

Alkali metal		Colour in flame test
$Li$	$⟶$	crimson red
$Na$	$⟶$	golden yellow
$K$	$⟶$	violet
$Rb$	$⟶$	red violet