S Block Elements Question 253
Question: mongst $ LiCl,\ RbCl,\ BeCl_2 $ and $ MgCl_2 $ the compounds with the greatest and least ionic character respectively are
[Pb. CET 2004]
Options:
A) $ LiCl $ and $ RbCl $
B) $ MgCl_2 $ and $ BeCl_2 $
C) $ RbCl $ and $ BeCl_2 $
D) $ RbCl $ and $ MgCl_2 $
Show Answer
Answer:
Correct Answer: C
Solution:
According to Fajan’s rule RbCl has greatest ionic character due to large ionic size of $ R{{b}^{+}} $ ion. $ BeCl_2 $ has least ionic (Maximum covalent) due to small size of $ B{{e}^{+2}} $ ion which has highly polarising.
BETA
