The Sum of number of lone pairs in central atom in IF₅ and IF₇ is:

Question

Statement-I : Consider the following pairs of ions $(\text{Sc}^{3+}, \text{Ti}^{3+}), (\text{Ti}^{4+}, \text{Ni}^{2+}), (\text{Cu}^{2+}, \text{Zn}^{2+})$ and $(\text{Cr}^{3+}, \text{Mn}^{3+})$. Out of these pairs three pairs consist of ions that are both coloured :
Statement-II : Among the lanthanide ions $\text{Eu}^{2+}$, $\text{Gd}^{3+}$, $\text{Ce}^{4+}$ and $\text{Tb}^{4+}$, the ion $\text{Tb}^{4+}$ is the strongest reducing agent.
Choose the correct option.

Answer 1

Step 1: Lone Pairs in IF₅

Valence electrons:

Iodine (I): 7 valence electrons
Fluorine (F): 7 valence electrons × 5 fluorine atoms = 35
Total valence electrons: $ 7 + 35 = 42 $

Bonding electrons:

5 I-F bonds = $ 5 × 2 = 10 $ bonding electrons

Remaining electrons:

$ 42 - 10 = 32 $ electrons used to complete the octet of fluorine atoms
$ 2 $ electrons left on iodine, forming 1 lone pair

Step 2: Lone Pairs in IF₇

Valence electrons:

Iodine (I): 7 valence electrons
Fluorine (F): 7 valence electrons × 7 fluorine atoms = 49
Total valence electrons: $ 7 + 49 = 56 $

Bonding electrons:

7 I-F bonds = $ 7 × 2 = 14 $ bonding electrons

Remaining electrons:

$ 56 - 14 = 42 $ electrons used to complete the octet of fluorine atoms
No electrons left on iodine, so there are 0 lone pairs on iodine

Step 3: Total Lone Pairs on the Central Atom

The sum of lone pairs on iodine in IF₅ and IF₇ is:

$ 1 + 0 = 1 $

Final Answer:

The total number of lone pairs on the central atoms in IF₅ and IF₇ is: 1.

The Sum of number of lone pairs in central atom in IF₅ and IF₇ is:

Solution and Explanation

Step 1: Lone Pairs in IF₅

Step 2: Lone Pairs in IF₇

Step 3: Total Lone Pairs on the Central Atom

Final Answer:

Top Questions on d -and f -Block Elements

Questions Asked in JEE Main exam

The Sum of number of lone pairs in central atom in IF5 and IF7 is:

Solution and Explanation

Step 1: Lone Pairs in IF5

Step 2: Lone Pairs in IF7

Step 3: Total Lone Pairs on the Central Atom

Final Answer:

Top Questions on d -and f -Block Elements

Questions Asked in JEE Main exam

The Sum of number of lone pairs in central atom in IF₅ and IF₇ is:

Step 1: Lone Pairs in IF₅

Step 2: Lone Pairs in IF₇