NEET UG 2017 — Chemistry Inorganic Chemistry

2017mcqmedium

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

Official previous-year question

Held on 30 Apr 2017 · Verified 9 Jul 2026.

Options

A
${\mathrm{BeCl}}_{2},{\mathrm{XeF}}_{2}$
B
${\mathrm{TeI}}_{2},{\mathrm{XeF}}_{2}$
C
${\mathrm{IBr}}_{2}^{-},{\mathrm{XeF}}_{2}$
D
${\mathrm{IF}}_{3},{\mathrm{XeF}}_{2}$

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Solution

(i) ${ \text{IBr}}_{2}^{-}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 1

number of the electron in the valence shell $=7+7+7+1=22$

(ii) ${ \text{BeCl}}_{\text{2}}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 2

${\text{sp}}^{\text{3}} \text{d}$ hybridised (linear).

Number of the electron in the valence shell $=2+7+7=16$

(iii) ${ \text{XeF}}_{\text{2}}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 3

number of electron in valence shell $=$ $8+7+7=22$

(iv) ${ \text{TeI}}_{\text{2}}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 4

number of the electron in the valence shell $\text{= 6+7+7=24}$

(v) ${ \text{IF}}_{\text{3}}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 5

number of the electron in the valence shell $=7+7+7+7=28$

${ \text{IBr}}_{2}^{-}$ and ${ \text{XeF}}_{\text{2}}$ both are isostructural and isoelectronic.

Your note

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Solution

(i) ${ \text{IBr}}_{2}^{-}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 1

number of the electron in the valence shell $=7+7+7+1=22$

(ii) ${ \text{BeCl}}_{\text{2}}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 2

${\text{sp}}^{\text{3}} \text{d}$ hybridised (linear).

Number of the electron in the valence shell $=2+7+7=16$

(iii) ${ \text{XeF}}_{\text{2}}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 3

number of electron in valence shell $=$ $8+7+7=22$

(iv) ${ \text{TeI}}_{\text{2}}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 4

number of the electron in the valence shell $\text{= 6+7+7=24}$

(v) ${ \text{IF}}_{\text{3}}$

NEET 2017 Chemistry, Chemical Bonding and Molecular Structure — solution figure 5

number of the electron in the valence shell $=7+7+7+7=28$

${ \text{IBr}}_{2}^{-}$ and ${ \text{XeF}}_{\text{2}}$ both are isostructural and isoelectronic.

NEET UG 2017 — Chemistry Inorganic Chemistry

Options

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Solution

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NEET UG 2017 — Chemistry Inorganic Chemistry

Options

Did you get this right?

Solution

Your note

NEET UG Inorganic Chemistry in other years

More NEET UG Inorganic Chemistry questions

Other Chemistry topics for NEET UG

Physical Chemistry

Organic Chemistry

Keep practicing Inorganic Chemistry