Chemistry - PERIODIC TABLE Question with Solution | TestHub

Consider the given statements in general and identify the number of correct statements(s) out of the following:

i) Ions of the same charge in a given series show a progressive decrease in radius with increasing atomic number.

ii) The shielding of one f electron by another is less than that of one d electron by another with an increase in nuclear charge along the series in the same subshell.

iii) As a result of lanthanide contraction, Zr and Hf have almost the same radii, which accounts for their occurrence together in nature and for the difficulty faced in their separation.

iv) The size of Ln³⁺ ions smoothly increases as their atomic number increases.

v) BrF₅ is a stronger fluorinating agent than BrF₃.

vi) KF acts as a base and SbF₅ acts as an acid in liquid BrF₃.

vii) Liquid I₂Cl₆ has appreciable conductivity due to self-ionization into I⁺ and ICl₆⁻.

viii) BrF₅ does not undergo disproportionation when dissolved in water.