Haloalkanes & Haloarenes · JEE Main previous year questions

2026 5 questions

1. Q732026 · 8 Apr 2026 · Shift 2· Numerical answer

   Consider two radiations of wavelengths 1. ${\lambda }_1=2000\text{A˚}$ 2. ${\lambda }_2=6000\text{A˚}$ The ratio of the energies of these two radiations $\left(\frac{{\mathrm{E}}_1}{{\mathrm{E}}_2}\right)$ is ____. (Nearest integer).

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   Answer: 3

2. Q592026 · 6 Apr 2026 · Shift 2

   Given below are two statements : Statement I : ${\text{F}}_2\text{O}<{\text{H}}_2\text{O}<{\text{Cl}}_2\text{O}$ is the correct trend in terms of bond angle. Statement II : ${\text{SiF}}_4$, ${\text{SnF}}_4$ and ${\text{PbF}}_4$ are ionic in nature. In the light of the above statements, choose the correct answer from the options given below :

   1. A.Both Statement I and Statement II are true
   2. B.Both Statement I and Statement II are false
   3. C.Statement I is true but Statement II is false
   4. D.Statement I is false but Statement II is true
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   Answer: C

3. Q652026 · 4 Apr 2026 · Shift 1

   Match the LIST-I with LIST-II $$\begin{array}{llll}& \text{List-I}& & \text{List-II}\\ & \text{Name of reaction}& & \text{Reagent or catalyst used}\\ \text{A.}& \text{Finkelstein reaction}& \text{I.}& \mathrm{Sb}{\mathrm{F}}_3\\ \text{B.}& \text{Swarts reaction}& \text{II.}& \mathrm{Na}\text{, dry ether}\\ \text{C.}& \text{Sandmeyer’s reaction}& \text{III.}& \mathrm{NaI}\\ \text{D.}& \text{Fittig reaction}& \text{IV.}& \mathrm{C}{\mathrm{u}}_2\mathrm{C}{\mathrm{l}}_2\end{array}$$ Choose the correct answer from the options given below:

   1. A.A-I, B-IV, C-III, D-II
   2. B.A-III, B-I, C-IV, D-II
   3. C.A-IV, B-II, C-I, D-III
   4. D.A-I, B-III, C-II, D-IV
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   Answer: B

4. Q652026 · 2 Apr 2026 · Shift 2

   Correct statements regarding alkyl halides ($\mathrm{R}-\mathrm{X}$) among the following are : A. Alcohol being less polar solvent as compared to water, alcoholic $\mathrm{KOH}$ favours elimination reaction with $\mathrm{R}-\mathrm{X}$. B. Order of reactivity towards ${\mathrm{S}}_{\mathrm{N}}^1$ mechanism is ${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{C}{\mathrm{H}}_2-\mathrm{Cl}>{\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{CHCl}-{\mathrm{C}}_6{\mathrm{H}}_5$. C. Non substituted aryl halides exhibit properties similar to alkyl halides. D. Vinyl chloride is an example of haloalkene and allyl chloride is an example of haloalkyne. E. $\mathrm{R}-\mathrm{Cl}$ can be prepared by reacting $\mathrm{R}-\mathrm{OH}$ with $\mathrm{SOC}{\mathrm{l}}_2$ but $\mathrm{Ar}-\mathrm{Cl}$ cannot be prepared by reacting $\mathrm{Ar}-\mathrm{OH}$ with $\mathrm{SOC}{\mathrm{l}}_2$. Choose the correct answer from the options given below :

   1. A.A, B and C Only
   2. B.B and D Only
   3. C.A and E Only
   4. D.D and E Only
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   Answer: C

5. Q662026 · 23 Jan 2026 · Shift 2

   Identify the INCORRECT statements from the following : A. Notation ${}_{12}^{24}\text{Mg}$ represents 24 protons and 12 neutrons. B. Wavelength of a radiation of frequency $4.5\times 10^{15}{\text{ s}}^{-1}$ is $6.7\times 10^{-8}\text{ m}$. C. One radiation has wavelength $={\lambda }_1(900\text{ nm})$ and energy $={\text{E}}_1$. Other radiation has wavelength $={\lambda }_2(300\text{ nm})$ and energy $={\text{E}}_2$. ${\text{E}}_1:{\text{E}}_2=3:1$. D. Number of photons of light of wavelength 2000 pm that provides 1 J of energy is $1.006\times 10^{16}$. Choose the correct answer from the options given below :

   1. A.A and D Only
   2. B.A and C Only
   3. C.A and B Only
   4. D.B and C Only
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   Answer: B