CBSE Class 12 Political Science (Urdu) Question Paper 2018 with Answer Key (April 6, Set 1

CBSE Class 12 Political Science (Urdu) Question Paper 2018 with Answer Key Set 1 - 252/1 is available for download. The exam was conducted by the Central Board of Secondary Education on April 6, 2018 in the Morning Session 10:30 AM to 1:30 PM. The medium of paper was Urdu. In terms of difficulty level, CBSE Class 12 Political Science (Urdu) paper was of Moderate level. The question paper comprised a total of 27 questions.

CBSE Class 12 Political Science (Urdu) Set 1 - 252/1 Question Paper 2018 with Answer Key (April 6)

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CBSE CLASS XII Questions

1.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

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2.
For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

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3.
Under what condition can a bimolecular reaction become kinetically first order?

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4.
Why are magnesium blocks attached to iron water pipelines?

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5.
Give structures of A, B and C: $CH_3Cl \xrightarrow{KCN}$ A $\xrightarrow{LiAlH_4}$ B $\xrightarrow{CHCl_3 + \text{alc. } KOH, \Delta}$ C

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6.
Predict the alkene that would be formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane.

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CBSE Class 12 Political Science (Urdu) Question Paper 2018 with Answer Key (April 6, Set 1 - 252/1)

CBSE Class 12 Political Science (Urdu) Set 1 - 252/1 Question Paper 2018 with Answer Key (April 6)

CBSE Class 12 Previous Year Question Papers

CBSE CLASS XII Questions

1.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

2.
For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

3.
Under what condition can a bimolecular reaction become kinetically first order?

4.
Why are magnesium blocks attached to iron water pipelines?

5.
Give structures of A, B and C: $CH_3Cl \xrightarrow{KCN}$ A $\xrightarrow{LiAlH_4}$ B $\xrightarrow{CHCl_3 + \text{alc. } KOH, \Delta}$ C

6.
Predict the alkene that would be formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane.

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CBSE Class 12 Political Science (Urdu) Set 1 - 252/1 Question Paper 2018 with Answer Key (April 6)

CBSE Class 12 Previous Year Question Papers

CBSE CLASS XII Questions

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

2.For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

3.Under what condition can a bimolecular reaction become kinetically first order?

4.Why are magnesium blocks attached to iron water pipelines?

5.Give structures of A, B and C: $CH_3Cl \xrightarrow{KCN}$ A $\xrightarrow{LiAlH_4}$ B $\xrightarrow{CHCl_3 + \text{alc. } KOH, \Delta}$ C

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

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1.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

2.
For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

3.
Under what condition can a bimolecular reaction become kinetically first order?

4.
Why are magnesium blocks attached to iron water pipelines?

5.
Give structures of A, B and C: $CH_3Cl \xrightarrow{KCN}$ A $\xrightarrow{LiAlH_4}$ B $\xrightarrow{CHCl_3 + \text{alc. } KOH, \Delta}$ C

6.
Predict the alkene that would be formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane.