Organic Reactions & Conversions · JEE Advanced previous year questions

2025 4 questions

1. Q452025 · 18 May 2025 · Paper 1· Numerical answer
   
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   Answer: 175

2. Q462025 · 18 May 2025 · Paper 1

   The correct match of the group reagents in $\text{List-I}$ for precipitating the metal ion given in $\text{List-II}$ from solutions, is $$\begin{array}{ll}\text{List-I}& \text{List-II}\\ \text{(P) Passing }{\mathrm{H}}_2\mathrm{S}\text{ in the presence of }\mathrm{N}{\mathrm{H}}_4\mathrm{OH}& \text{(1) }\mathrm{C}{\mathrm{u}}^{2+}\\ \text{(Q) }(\mathrm{N}{\mathrm{H}}_4{)}_2\mathrm{C}{\mathrm{O}}_3\text{ in the presence of }\mathrm{N}{\mathrm{H}}_4\mathrm{OH}& \text{(2) }\mathrm{A}{\mathrm{l}}^{3+}\\ \text{(R) }\mathrm{N}{\mathrm{H}}_4\mathrm{OH}\text{ in the presence of }\mathrm{N}{\mathrm{H}}_4\mathrm{Cl}& \text{(3) }\mathrm{M}{\mathrm{n}}^{2+}\\ \text{(S) Passing }{\mathrm{H}}_2\mathrm{S}\text{ in the presence of dilute HCl}& \text{(4) }\mathrm{B}{\mathrm{a}}^{2+}\\ & \text{(5) }\mathrm{M}{\mathrm{g}}^{2+}\end{array}$$

   1. A.P → 3; Q → 4; R → 2; S → 1
   2. B.P → 4; Q → 2; R → 3; S → 1
   3. C.P → 3; Q → 4; R → 1; S → 5
   4. D.P → 5; Q → 3; R → 2; S → 4
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   Answer: A

3. Q352025 · 18 May 2025 · Paper 2
   
   1. A.$\mathbf{P}$
   2. B.$\mathbf{Q}$
   3. C.$\mathbf{R}$
   4. D.$\mathbf{S}$
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   Answer: D

4. Q362025 · 18 May 2025 · Paper 2
   
   1. A.(A)
   2. B.(B)
   3. C.(C)
   4. D.(D)
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   Answer: C