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For alkali metals, which one of the following trends is incorrect ?

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For alkali metals, which one of the following trends is incorrect ?
A. Hydration energy : Li `gt` Na `gt` K `gt` rb
B. Ionization energy : Li `gt` Na `gt` K `gt` Rb
C. Density : Li `gt` Na `gt` K `gt` Rb
D. Atomic size : Li `lt` Na `lt` K `lt` Rb.
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Correct Answer - C
The density of K is lower than that of Na. Therefore, trend C is in correct.
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