Which of the following pairs of compounds is isoelectronic and isostructural?

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${IBr}_{2}^{-}, {XeF}_{2}$

${TeI}_{2}, {XeF}_{2}$

${IF}_{3}, {XeF}_{2}$

${BeCl}_{2}, {XeF}_{2}$

answer is B.

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Detailed Solution

Isoelectronic:
Same number of electrons
Isostructure:
Same molecular geometry

Species	Total number of α electron valency	Molecular geometry
${Br}_{2}^{-}$	22	Linear
${XeF}_{2}$	22	Linear
${Tel}_{2}$	20	Angular
${XeF}_{2}$	22	Linear
${IF}_{3}$	28	T-shape
${XeF}_{2}$	22	Linear
${BeCl}_{2}$	16	Linear
${XeF}_{2}$	22	Linear

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