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AP EAMCET Engineering 20 Apr 2019 Shift 1 Paper
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Question : 132
Total: 160
Identify the correct statements from the following.
l) Tendency to form halide hydrates gradually increases from Be to Ba down the group.
II) Tendency to form stable super oxides increases from Li to Cs down the group.
III) Low solubility of LiF is due to its high lattice energy.
IV) Solubility of carbonates of group-2 elements increases down the group.
I , II
III , IV
II , III
I , III
Validate
Solution:
The bigger atom can stabilise the bigger superoxide ion with less negative field.
Since, the size of fluorine ion is smaller, it has high lattice energy and hence less solubility.
Therefore, statement II and III are correct.
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