NEET UG 2016 — Chemistry Inorganic Chemistry

2016mcqhard

The correct increasing order of trans-effect of the following species is

Official previous-year question

Held on 30 Apr 2016 · Verified 9 Jul 2026.

Options

A
${\mathrm{NH}}_{3}>{\mathrm{CN}}^{-}>{\mathrm{Br}}^{-}>{C}_{6}{H}_{5}^{-}$
B
${\mathrm{CN}}^{-}>{C}_{6}{H}_{5}^{-}>{\mathrm{Br}}^{-}>{\mathrm{NH}}_{3}$
C
${\mathrm{Br}}^{-}>{\mathrm{CN}}^{-}>{\mathrm{NH}}_{3}>{C}_{6}{H}_{5}^{-}$
D
${\mathrm{CN}}^{-}>{\mathrm{Br}}^{-}>{C}_{6}{H}_{5}^{-}>{\mathrm{NH}}_{3}$

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Solution

The trans effect is the increased lability of ligands that are trans to certain other ligands, which can thus be regarded as trans-directing ligands. It is attributed to electronic effects and it is most notable in square planar complexes, although it can also be observed for octahedral complexes.

${\mathrm{CN}}^{-}>{C}_{6}{H}_{5}^{-}>{\mathrm{Br}}^{-}>{\mathrm{NH}}_{3}$

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Options

${\mathrm{NH}}_{3}>{\mathrm{CN}}^{-}>{\mathrm{Br}}^{-}>{C}_{6}{H}_{5}^{-}$

${\mathrm{CN}}^{-}>{C}_{6}{H}_{5}^{-}>{\mathrm{Br}}^{-}>{\mathrm{NH}}_{3}$

${\mathrm{Br}}^{-}>{\mathrm{CN}}^{-}>{\mathrm{NH}}_{3}>{C}_{6}{H}_{5}^{-}$

${\mathrm{CN}}^{-}>{\mathrm{Br}}^{-}>{C}_{6}{H}_{5}^{-}>{\mathrm{NH}}_{3}$

Solution

${\mathrm{CN}}^{-}>{C}_{6}{H}_{5}^{-}>{\mathrm{Br}}^{-}>{\mathrm{NH}}_{3}$

NEET UG 2016 — Chemistry Inorganic Chemistry

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NEET UG 2016 — 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