CBSE Class 12 Marketing Compartment Question Paper 2022 with Answer Key (August 23, Set 4- 336)

CBSE CLASS XII Questions

• 1.

  A reaction \( \mathrm{A \rightarrow B} \) follows second order kinetics. How will the rate of reaction be affected if the concentration of (i) A is increased by three times, and (ii) A is reduced to half ?

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• 2.

  Draw the structures of major monohalo products in each of the following :

  (a)

  (b)

  
  

  

  
  

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• 3.

  (i) A first order reaction is 20% complete in 10 minutes. Calculate the time taken when 80% of the reaction will be completed.

  [Given : log 5 = 0.7, log 4 = 0.6]

  (ii) For a chemical reaction \( \mathrm{R \rightarrow P} \), variation in \( \ln[\mathrm{R}] \) vs. time (t) graph is given below :

  (I) Predict the order of the reaction.

  (II) Write the slope of the curve.

  
  

  

  
  

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• 4.

  Match Column I with Column II and choose the correct option :

  Column I	Column II
  a. Osmotic pressure	i. \( \Delta \mathrm{T_f} = \mathrm{K_f}\,m \)
  b. Elevation of boiling point	ii. \( \pi = CRT \)
  c. Depression of freezing point	iii. \( \frac{\mathrm{P_1^0 - P_1}}{\mathrm{P_1^0}} = \frac{\mathrm{W_2 \times M_1}}{\mathrm{M_2 \times W_1}} \)
  d. Relative lowering of vapour pressure	iv. \( \Delta \mathrm{T_b} = \mathrm{K_b}\,m \)

  • a-i, b-ii, c-iii, d-iv
  • a-ii, b-i, c-iii, d-iv
  • a-iv, b-iii, c-ii, d-i
  • a-ii, b-iv, c-i, d-iii
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• 5.

  (a) What are anomers ? Explain.

  (b) What happens when glucose reacts with hydroxylamine ? Write the reaction involved.

  (c) Name the disease caused by the deficiency of Vitamin B\(_{12}\).

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• 6.

  The electrical resistance of a column of 0.05 M KOH solution of area 0.5 cm\(^2\) and length 50 cm is 2.5 \(\times\) 10\(^4\) ohm. Calculate its molar conductivity.

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