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Q.

Metal salt which give Lilac flame in contact with flame :

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a

Calcium salt

b

Barium Salt

c

Potassium salt

d

Sodium Salt

answer is C.

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Detailed Solution

Potassium burns with a lilac flame.

It is soft alkali metal that oxidizes rapidly in air and is very reactive with water generating sufficient heat to ignite the hydrogen emitted in the reaction.

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Metal salt which give Lilac flame in contact with flame :