Geo-Scientist Prelims 2023 Chemistry Q20: Which of the following statements regarding radius ratio rule…

Which of the following statements regarding radius ratio rule is/are correct ?

1. Radius ratio quite often fails when its value is close to one of the limiting values.
2. Radius ratios are not affected by the polarizability of the electron clouds of ions.
3. Radius ratio rule strictly works if the ions are treated as hard spheres.
4. Radius ratio rule will not work if an ionic compound shows polymorphism.

Select the correct answer using the code given below :

1. (a) 2 only
2. (b) 1, 3 and 4
3. (c) 3 and 4 only
4. (d) 1 and 3 only