JEE Main 2024 Chemistry question
Number of metal ions characterized by flame test among the following is . Sr²⁺, Ba²⁺, Ca²⁺, Cu²⁺, Zn²⁺, Co²⁺, Fe²⁺
Answer: 4
Solution
Ca²⁺ (brick red), Sr²⁺ (crimson red), Ba²⁺ (grassy green) and Cu²⁺ (blue-green) give characteristic flame colours, so 4.