Chemical & Ionic Equilibrium · JEE Advanced previous year questions

7 questions asked across 3 exam years, newest first

2025 4 questions

Q412025 · 18 May 2025 · Paper 1· Numerical answer
At 25 °C, the concentration of $H^{+}$ ions in $1.00 \times 1 0^{- 3}$ M aqueous solution of a weak monobasic acid having acid dissociation constant $(K_{a})$ of $4.00 \times 1 0^{- 11}$ is $X \times 1 0^{- 7}$ M. The value of $X$ is ____. $Use$ : Ionic product of water $(K_{w}) = 1.00 \times 1 0^{- 14}$ at 25 °C
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Answer: 2.2 to 2.3
Q342025 · 18 May 2025 · Paper 2
The complete hydrolysis of $ICl$ , $Cl F_{3}$ and $Br F_{5}$ , respectively, gives
1. A. $I O^{-}$ , $Cl O_{2}^{-}$ and $Br O_{3}^{-}$
2. B. $I O_{3}^{-}$ , $Cl O_{2}^{-}$ and $Br O_{3}^{-}$
3. C. $I O^{-}$ , $Cl O^{-}$ and $Br O_{2}^{-}$
4. D. $I O_{3}^{-}$ , $Cl O_{4}^{-}$ and $Br O_{2}^{-}$
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Answer: A
Q402025 · 18 May 2025 · Paper 2· One or more correct
1. A. $P$ is optically active.
2. B. $S$ gives Bayer's test.
3. C. $Q$ gives effervescence with aq. $NaHCO_{3}$ .
4. D. $R$ is an alkyne.
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Answer: B, C
Q422025 · 18 May 2025 · Paper 2· Numerical answer
The solubility of barium iodate in an aqueous solution prepared by mixing $200 mL$ of $0.010 M$ barium nitrate with $100 mL$ of $0.10 M$ sodium iodate is $X \times 1 0^{- 6} mol dm^{- 3}$ . The value of $X$ is _________. $Use:$ Solubility product constant ( $K_{sp}$ ) of barium iodate $= 1.58 \times 1 0^{- 9}$
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Answer: 3.85 to 4.15