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The correct order of the lattice energies of teh following ionic compounds isa) Nacl>MgBr2>CaO>Al2O3b)Al2O3>MgBr2>CaO>NaClc)MgBr2>Al2O3>CaO>NaCld)Al2O3>CaO>MgBr2>NaCl please answer this question fastly I want it fast I want correct reason |
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Answer» As we GO across a period, the ionic CHARGES INCREASE. DUE to this the lattice enthalpy or charges also increase. Hence lattice energy of Al > Mg > Na. Also as we go down a group ionic size only increases but charge remains same. Hence as we go down a group, lattice energy DECREASES. => Li > Na > K No we can first arrange the cations in the question. Given Cations are : Na, Mg, Ca, Al We know that, Al > Mg > Na Also Mg > Ca => Correct order of decreasing lattice enthalpies are : Al > Mg > Ca > Na => Option ( b ) has the same criteria. Hence Option ( B ) is correct option. Al₂O₃ > MgBr₂ > CaO > NaCl. |
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