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Ionisation Energy

Decreasing or...

Question

Decreasing order of lattice energy of $F e O, F e_{2} O_{3}, N a C l$ is:

N a C l > F e O > F e_{2} O_{3}

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F e_{2} O_{3} > F e O > N a C l

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N a C l > F e O = F e_{2} O_{3}

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F e_{2} O_{3} > N a C l > F e O

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Solution

The correct option is B $F e_{2} O_{3} > F e O > N a C l$
Lattice energy is defined as the energy required to separate a mole of an ionic solid into gaseous ions. Lattice energy cannot be measured empirically, but it can be calculated using electrostatics or estimated using the Born-Haber cycle.

Correct order is $F e_{2} O_{3} > F e O > N a C l$

Hence , option B is correct .

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