MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic Chemistrys- Block 3.0Previous Year Questions
For alkali metals, which one of the following trends is incorrect? (KCET 2010)
A.Hydration energy : Li > Na > K > Rb
B.Ionisation energy : Li > Na > K > Rb
C.Density : Li > Na > K > Rb✓ Correct
D.Atomic size : Li < Na < K < Rb
Explanation
Atomic size of elements increases as we move down the group as follows Li < Na < K < Rb. 18 s-BLOCK Trend of density in alkali metals is Li < K < Na < Rb. And we know the hydration energy and ionization energy are inversely proportional to the atomic size. The density of K < Na.
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