Question

A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame no distinctive colour is noticed, the cation would be?

• A. $M{g}^{2+}$
• B. $B{a}^{2+}$
• C. $P{b}^{2+}$
• D. $C{a}^{2+}$

Answer 1

The correct option is A $M{g}^{2+}$

A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame no distinctive colour is noticed, the cation would be $M{g}^{2+}$.
Note: In the flame test, barium, potassium, calcium
and sodium gives apple green, violet, brick red and golden yellow colours respectively.
Solution: Ra
Colour in flame test is given by alkali and alkaline earth metals. Be and Mg do not give flame test. Lead salts are usually sparingly soluble in water.