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Question:

Match the interhalogen compounds of column I with the geometry in column II and assign the correct code.
Column I
Column II
(a)XX′ (i) T-shape
(b)XX′3 (ii) Pentagonal bipyramidal
(c)XX′5 (iii) Linear
(d)XX′7 (iv) Square - pyramidal
(v) Tetrahedral

(a)-(iii),(b)-(iv),(c)-(i),(d)-(ii)

(a)-(iii),(b)-(i),(c)-(iv),(d)-(ii)

(a)-(v),(b)-(iv),(c)-(iii),(d)-(ii)

(a)-(iv),(b)-(iii),(c)-(ii),(d)-(i)

Solution:

(a)-(iii), XX′ has linear geometry as only two atoms are present (b)-(i), XX′3 has T-shaped geometry as 3 bond pairs and 2 lone pairs of electrons are present. The electron pair geometry is trigonal bipyramidal (c)-(iv), XX′5 has Square - pyramidal geometry as 5 bond pairs and 1 lone pair of electrons are present. The electron pair geometry is octahedral (d)-(ii) XX′7 has pentagonal bipyramidal geometry as 7 bond pairs and 0 lone pairs of electrons are present.