question : Which of the following is incorrect statement ?
(1) PbF4 is covalent in nature
(2) SiCl4 is easily hydrolyzed
(3) GeX4 (X = F, Cl, Br, I) is more stable than GeX2
(4) SnF4 is ionic in nature
answer : from all above options the correct answer is “(1) PbF4 is covalent in nature” as we know that “PbF4” is ionic in nature and in options given that “PbF4” is covalent in nature that is false statement that is why we have marked this option for our correct answer as per question requirement.
answer explanation : to ensure bonding nature is covalent or ionic , Fajans rule is used according to Fajan’s rule covalent or ionic bonds depends on the charge on the cation and the relative sizes of the cation and anion. In option (1) the size gap is high of Pb and F , Pb is very large in size and F is very small in size , so according to Fajan’s law in PbF4 , the ionic bond is found that is why statement (1) is incorrect and in question it is asked incorrect statement that is why we have marked this option as correct answer.