NEET-XII-Chemistry
Previous Year Paper year:2018
- #55Among ``\ce{CaH2}``, ``\ce{BeH2}``, ``\ce{BaH2}``, the order of ionic
character is
(1)``\ce BeH2 < CaH2 < BaH2``
(2) ``\ce CaH2 < BeH2 < BaH2``
(3) ``\ce BeH2 < BaH2 < CaH2``
(4) ``\ce BaH2 < BeH2 < CaH2``digAnsr: 1Ans : (1)
Sol. BeH2 < CaH2 < BaH2
Smaller the size of cation, more will be its polarising
power. Hence BeH2 will be least ionic.