JEE Main 2021 · ChemistryNumerical answerNumerical valueHardMulti-step

JEE Main 27 August 2021, Shift 1, Chemistry Q54

Question 54 of 90 in this shift, Chemistry question 24 of 30, Section B.

The number of moles of

\mathrm{NH_3}

, that must be added to 2 L of 0.80 M

\mathrm{AgNO_3}

in order to reduce the concentration of

\mathrm{Ag^+}

ions to

5.0 \times 10^{-8}

M (

\mathrm{K_{formation}}

for

[\mathrm{Ag(NH_3)_2}]^+ = 1.0 \times 10^8

) is __________. (Nearest integer) [Assume no volume change on adding

\mathrm{NH_3}

]

Official answer

NTA final key.

Chapter: Equilibrium
Topic: Solubility Product
Idea tested: Complexation Effect on Solubility

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.