(11) The compound with the smallest lattice energy amongst the given compounds i

Question

(11)

The compound with the smallest lattice energy amongst the given compounds in terms of magnitude is KI, because it has larger cation size as compared to NaI.

Also since Mg has higher cationic charge, so its compounds have higher lattice energy value.

Hence the correct answer is KI.

(12)

The correct statement amongst the given ones is:

(B) Compounds have a constant composition but mixtures do not.

Statement C is false because elements in a mixture can be more easily separated by chemical methods.

Hope this helps !

Explanation / Answer

11. Which of the following compounds should have the smallest lattice energy? A. NaCl B. Nal C. KI D. MgS E. MgO 12. Which of the following correctly describes one of the differences between compounds and mixtures? A. Compounds contain more than one element but mixtures do not. B. Compounds have a constant composition but mixtures do not. C. It is easier to separate the elements in a compound than it is to separate the elements in a mixture. D. All of these statements are true. E. None of these statements are true. Final Exam B

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