CBSE Class 12 Hindi Core Compartment Question Paper 2023 with Answer Key (Set 3

CBSE Class 12 Hindi Core Compartment Question Paper 2023 with Answer Key pdf (Set 3 - 2/C/3) is available for download here. The exam was conducted by Central Board of Secondary Education on July 17, 2023 in the Morning Session 10:30 AM to 1:30 PM. The question paper comprised a total of 13 questions divided among 2 sections.

CBSE Class 12 Hindi Core (Set 3 - 2/C/3) Compartment Question Paper 2023 with Answer Key

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4ADFK1

1.
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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2.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

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3.
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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CBSE Class 12 Hindi Core Compartment Question Paper 2023 with Answer Key (Set 3 - 2/C/3)

CBSE Class 12 Hindi Core (Set 3 - 2/C/3) Compartment Question Paper 2023 with Answer Key

CBSE Class 12 Previous Year Question Papers

4ADFK1

1.
Give structures of A, B and C: $CH_3Cl \xrightarrow{KCN}$ A $\xrightarrow{LiAlH_4}$ B $\xrightarrow{CHCl_3 + \text{alc. } KOH, \Delta}$ C

2.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

3.
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.

4.
Write mechanism of acid dehydration of ethanol to ethene.

5.
What are reducing sugars?

6.
Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?

Comments

dOGVmW

CBSE Class 12 Hindi Core (Set 3 - 2/C/3) Compartment Question Paper 2023 with Answer Key

CBSE Class 12 Previous Year Question Papers

4ADFK1

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

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

3.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.

4.Write mechanism of acid dehydration of ethanol to ethene.

5.What are reducing sugars?

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

Comments

dOGVmW

1.
Give structures of A, B and C: $CH_3Cl \xrightarrow{KCN}$ A $\xrightarrow{LiAlH_4}$ B $\xrightarrow{CHCl_3 + \text{alc. } KOH, \Delta}$ C

2.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

3.
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.

4.
Write mechanism of acid dehydration of ethanol to ethene.

5.
What are reducing sugars?

6.
Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?