Question

Which one indicates a red flame when ionized with a Bunsen burner ?

• A. 0.1 M MgCl${}_2$
• B. 0.1 M HClO${}_4$
• C. 0.1 M NH${}_4$OH
• D. 0.1 M KOH
• E. 0.1 M LiNO${}_3$

Answer 1

The correct option is E 0.1 M LiNO${}_3$

0.1 M $LiN{O}_3$ indicates a red flame when ionized with a Bunsen burner.
Metal ions impart characteristic colour to flame.
Given below are the flame colors and the metal ions that impart that colour.
Red: Lithium, strontium
Orange: Calcium
Yellow: Sodium
Green: Barium, copper
Violet: Potassium