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a
hexamminechromium (VI) ion
b
hexamminechromium (III) ion
c
hexamminechromium (II) ion
d
hexamminechloride
answer is B.
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Detailed Solution
ln the given ion CrNH363+, the oxidation state of chromium is +3 and here 6NH3 ligands are attached to the central metal atom. Therefore its IUPAC name is hexamminechromium (III) ion.