CBSE Class 12 Economics (Urdu) Question Paper 2013 with Answer Key (March 30, Code - 251/1/1)

CBSE CLASS XII Questions

• 1.

  Explain: (i) Presence of carbonyl group in glucose. (ii) Presence of five $-$OH groups attached to different carbon atoms.

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• 2.

  Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
  (b) p-Hydroxyphenethyl alcohol + HBr

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• 3.

  Predict the alkene that would be formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane.

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• 4.

  Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

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• 5.

  Predict the alkene formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane.

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• 6.

  Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?

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