JEE Main PYQs on Chemical Reactions of Haloalkanes and Haloarenes: JEE Main Questions for Practice with Solutions

JEE Main Questions

• 1.

  Which of the following statement is true with respect to H\(_2\)O, NH\(_3\) and CH\(_4\)? 
  (A) The central atoms of all the molecules are sp\(^3\) hybridized. 
  (B) The H–O–H, H–N–H and H–C–H angles in the above molecules are 104.5°, 107.5° and 109.5° respectively. 
  (C) The increasing order of dipole moment is CH\(_4\)<NH\(_3\)<H\(_2\)O. 
  (D) Both H\(_2\)O and NH\(_3\) are Lewis acids and CH\(_4\) is a Lewis base. 
  (E) A solution of NH\(_3\) in H\(_2\)O is basic. In this solution NH\(_3\) and H\(_2\)O act as Lowry-Bronsted acid and base respectively. 
   

  • A, B, and C only
    
  • C, D, and E only
    
  • A, D, and E only
    
  • A, B, C, and E only
    
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• 2.

  A compound 'X' absorbs 2 moles of hydrogen and 'X' upon oxidation with KMnO4 - H⁺ gives the following products:

  

  The total number of \(\sigma\) bonds present in the compound 'X' is ----.

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• 3.

  The elemental composition of a compound is 54.2%C, 9.2%H, and 36.6%O. If the molar mass of the compound is 132 g/mol, the molecular formula of the compound is:

  • \( \text{C}_6 \text{H}_{12} \text{O}_6 \)
    
  • \( \text{C}_6 \text{H}_{12} \text{O}_3 \)
    
  • \( \text{C}_4 \text{H}_9 \text{O}_3 \)
    
  • \( \text{C}_4 \text{H}_8 \text{O}_2 \)
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• 4.

  For the thermal decomposition of \( N_2O_5(g) \) at constant volume, the following table can be formed, for the reaction mentioned below: \[ 2 N_2O_5(g) \rightarrow 2 N_2O_4(g) + O_2(g) \] Given: Rate constant for the reaction is \( 4.606 \times 10^{-2} \text{ s}^{-1} \). 

  

   

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• 5.

  The maximum covalency of a non-metallic group 15 element 'E' with the weakest E-E bond is:

  • 6
    
  • 5
    
  • 3
    
  • 4
    
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• 6.

  Given below are two statements about X-ray spectra of elements:
  Statement (I):A plot of \(\sqrt {v}\) (v=frequency of X-rays emitted) vs atomic mass is a straight line.
  Statement (II): A plot of v (v=frequency of X-rays emitted)} vs atomic number is a straight line.

  • Statement I is true but Statement II is false
  • Both Statement I and Statement II are true
  • Both Statement I and Statement II are false
  • Statement I is false but Statement II is true
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