An aqueous solution of salt of sodium (NaX) on boiling with MgCl_2 gives white precipitate, hence anion X is:

JEE Main Chemistry question

An aqueous solution of salt of sodium (NaX) on boiling with gives white precipitate, hence anion X is:

(A)Correct
(B)
(C)
(D)

Answer: (A)

Solution

Sodium bicarbonate reacts with on boiling to precipitate insoluble magnesium carbonate: 2NaHCO_3+MgCl_2 \to MgCO_3\downarrow+2NaCl+H_2O+CO_2. and (B, D) form soluble magnesium salts and would not give a

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Question ID VK-137813