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1

NEET 2017

MCQ (More than One Correct Answer)
Which of the following pairs of compounds is isostructural ?
A
Tel2, XeF2
B
IBr2$$-$$, XeF2
C
IF3, XeF2
D
BeCl2, XeF2

Explanation

Species No. of electrons Structure
TeI2 158 Bent
XeF2 72 Linear
IBr2 124 Linear
XeF2 72 Linear
IF3 80 T-shaped
XeF3 72 Linear
BeCl2 38 Linear
XeF2 72 Linear
2

NEET 2016 Phase 2

MCQ (More than One Correct Answer)
Which of the following pairs of ions is isoelectronic and isostructural ?
A
$$C{O_3}^{2 - },\,\,N{O_3}^ - $$
B
$$C{lO_3}^{2 - },\,\,C{O_3}^{2 - }$$
C
$$S{O_3}^{2 - },\,\,N{O_3}^ - $$
D
$$Cl{O_3}^ - ,\,\,S{O_3}^{2 - }$$

Explanation

$$CO^{2-}_3$$; 6 + 24 + 2 = 32; sp2; trigonal planar

$$N)_3^-$$ : 7 + 24 + 1 = 32; sp2, trigonal planar

So, these are isoelectronic as well as isostructural.

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