Q.

Which of the following pairs can be distinguished by the action of heat?

Moderate

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Na2CO3 and CaCO3

K2CO3 and MgCO3

CaNO32 and Li NO3

MgCl2⋅6H2O and CaCl2⋅6H2O

answer is A.

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Detailed Solution

Na2CO3⟶Δ No reaction CaCO3⟶ΔCaO+CO2K2CO3⟶Δ No reaction MgCO3⟶ΔMgO+CO2CaNO32⟶ΔCaO+2NO2+12O24LiNO3→2 Li2O+O2 +4NO2MgCl2⋅6H2O⟶ΔMgCl2+6H2OCaCl2⋅6H2O⟶ΔCaCl2+6H2O

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