S Block Elements Question 1
Question 1 - 24 January - Shift 1
Order of Covalent bond;
A. $KF>KI ; LiF>KF$
B. $KF<KI ; LiF>KF$
C. $SnCl_4>SnCl_2 ; CuCl>NaCl$
D. $LiF>KF ; CuCl<NaCl$
E. $KF<KI ; CuCl>NaCl$
(1) C, E only
(2) B, C only
(3) B, C, E only
(4) A, B only
Show Answer
Answer: (3)
Solution:
Formula: Fajan’s rule
According to Fajan’s Rule,
A. $KF>KI-$ False; $LiF>KF-$ True
B. $KF<KI-$ True; $LiF>KF-$ True
C. $SnCl_4>SnCl_2$ - True; $CuCl>NaCl-$ True
D. $LiF>KF-$ True; $CuCl<NaCl-$ False
E. $KF<KI-$ True; $CuCl>NaCl-$ True
