‘X’ is a salt which on thermal decomposition gives an acidic oxide and a basic oxide. ‘X’ imparts no colour to the oxidizing flame of Bunsen burner. ‘X’ is

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CaCO3

MgCO3

NaCl

KNO3

answer is B.

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Detailed Solution

Magnesium salts do not impart colour to the flame.MgCO3→∆ MgO+CO2 Basic Acidic

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