AIEEE 2007 | Chemical Bonding & Molecular Structure Question 202 | Chemistry

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizinig order of the polarizing power of the cationic species, K⁺, Ca²⁺, Mg²⁺, Be²⁺?

Mg²⁺ < Be²⁺ < K⁺ < Ca²⁺

K⁺ < Ca²⁺ < Mg²⁺ < Be²⁺

Be²⁺ < K⁺ < Ca²⁺ < Mg²⁺

Ca²⁺ < Mg²⁺ < Be²⁺ < K⁺

AIEEE 2007

MCQ (Single Correct Answer)

-1

In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?

$$C_2 \to C_2^+$$

$$N_2 \to N_2^+$$

$$NO \to NO^+$$

$$O_2 \to O_2^+$$

AIEEE 2006

MCQ (Single Correct Answer)

-1

The decreasing values of bond angles from NH₃ (106^o) to SbH₃ (91^o ) down group-15 of the periodic table is due to

increasing bp-bp repulsion

increasing p-orbital character in sp³

decreasing lp-bp repulsion

decreasing electronegativity

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