CBSE Class 12 Chemistry Question Paper 2026 with Solutions (Set 2 - 56/1/2)

CBSE CLASS XII Questions

• 1.

  Following reaction takes place in one step :
  \( 2A + B \rightarrow 2C \)
  How will the rate of above reaction change if the volume of the reaction vessel is decreased to one third of its original volume? Will there be any change in the order of reaction with the reduced volume?
  

  View Solution

  ---

• 2.

  Assertion (A) : Actinoids show irregularities in their electronic configurations.
  Reason (R) : In actinoids 5f, 6d and 7s orbitals are of comparable energies.
  

  View Solution

  ---

• 3.

  Which of the following reagents are used to prepare primary amines by Hofmann bromamide degradation reaction?
  

  

  • (i), (ii) and (iv)
    
  • (i) and (iii)
    
  • (i), (ii) and (iii)
    
  • (i), (iii) and (iv)
  View Solution

  ---

• 4.

  Compound ‘X’ with molecular formula \( C_4H_9Br \) reacts with aqueous KOH to give an alcohol. The rate of this reaction depends only on the concentration of compound ‘X’. When an optically active isomer ‘Y’ of the compound ‘X’ was treated with aqueous KOH solution, the rate of reaction was found to be dependent on concentration of compound ‘Y’ and aqueous KOH both.
  
  22(a). Write down the structural formula of both ‘X’ and ‘Y’.
  

  View Solution

  ---

• 5.

  Consider the following reaction: \[ \text{Zn}_{(s)} + \text{Ag}_2\text{O}_{(s)} + \text{H}_2\text{O}_{(l)} \rightarrow \text{Zn}^{2+}_{(aq)} + 2\text{Ag}_{(s)} + 2\text{OH}^-_{(aq)} \] Given: \[ E^\circ_{\text{Ag}^+/\text{Ag}} = 0.80 \text{ V} \] \[ E^\circ_{\text{Zn}^{2+}/\text{Zn}} = -0.76 \text{ V} \] \[ 1F = 96500 \text{ C mol}^{-1} \] $\Delta G^\circ$ for above reaction is:

  • $-301.080 \text{ kJ mol}^{-1}$
    
  • $+310.080 \text{ kJ mol}^{-1}$
    
  • $-326.070 \text{ kJ mol}^{-1}$
    
  • $375.060 \text{ kJ mol}^{-1}$
  View Solution

  ---

• 6.

  Calculate emf of the following cell at 298 K: \[ \text{Cr(s)} \, | \, \text{Cr}^{3+} (aq) \, (0.1\, M) \; || \; \text{Fe}^{2+} (aq) \, (0.01\, M) \, | \, \text{Fe(s)} \] Given: \[ E^\circ_{\text{Cr}^{3+}/\text{Cr}} = -0.74 \, V, \quad E^\circ_{\text{Fe}^{2+}/\text{Fe}} = -0.44 \, V, \quad \log 10 = 1 \]

  View Solution