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JEE Main levelSingle correct optionDifficulty 2 of 3ie019

In the complex-forming reaction $Ag X^{+} + 2 NH X_{3} [Ag (NH X_{3}) X_{2}] X^{+}$ , which statement is correct?

A $Ag X^{+}$ acts as a Lewis base and $NH X_{3}$ as a Lewis acid.
B $NH X_{3}$ acts as an Arrhenius base because it gives $OH X^{-}$ here.
C $Ag X^{+}$ acts as a Lewis acid and $NH X_{3}$ as a Lewis base.
D $Ag X^{+}$ acts as a Bronsted-Lowry acid by donating a proton.

Answer: C

NH X_{3}

donates its lone pair to the vacant orbitals of

Ag X^{+}

, so

NH X_{3}

is a Lewis base and

Ag X^{+}

a Lewis acid. No proton transfer or

OH X^{-}

formation takes place, so Bronsted-Lowry and Arrhenius descriptions do not apply.

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