CBSE Class 12 Chemistry Question Paper 2019 with Answer Key (March 12, Set 1- 56/5/1)

CBSE Class 12 Chemistry Question Paper 2019 with Answer Key Set 1- 56/5/1 is available for download. The exam was conducted by the Central Board of Secondary Education on March 12, 2019 in the Morning Session 10:30 AM to 1:30 PM. The medium of paper was English & Hindi. In terms of difficulty level, CBSE Class 12 Chemistry paper was of Easy to Moderate level. The question paper comprised a total of 27 questions divided among 4 sections.

CBSE Class 12 Chemistry Set 1- 56/5/1 Question Paper 2019 with Answer Key (March 12)

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CBSE Class 12 Previous Year Question Papers

CBSE Question Paper 2020	CBSE Question Paper 2019	CBSE Question Paper 2018
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CBSE CLASS XII Questions

1.
Though chlorine shows strong $-I$ effect, why is it ortho/para directing?

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2.
Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?

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3.
Predict the alkene that would be formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane.

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4.
Explain: (i) Presence of carbonyl group in glucose. (ii) Presence of five $-$OH groups attached to different carbon atoms.

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5.
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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6.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

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CBSE Class 12 Chemistry Question Paper 2019 with Answer Key (March 12, Set 1- 56/5/1)

CBSE Class 12 Chemistry Set 1- 56/5/1 Question Paper 2019 with Answer Key (March 12)

CBSE Class 12 Previous Year Question Papers

CBSE CLASS XII Questions

1.
Though chlorine shows strong $-I$ effect, why is it ortho/para directing?

2.
Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?

3.
Predict the alkene that would be formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane.

4.
Explain: (i) Presence of carbonyl group in glucose. (ii) Presence of five $-$OH groups attached to different carbon atoms.

5.
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.

6.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

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CBSE Class 12 Chemistry Set 1- 56/5/1 Question Paper 2019 with Answer Key (March 12)

CBSE Class 12 Previous Year Question Papers

CBSE CLASS XII Questions

1.Though chlorine shows strong $-I$ effect, why is it ortho/para directing?

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

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

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

5.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.

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

Comments

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1.
Though chlorine shows strong $-I$ effect, why is it ortho/para directing?

2.
Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?

3.
Predict the alkene that would be formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane.

4.
Explain: (i) Presence of carbonyl group in glucose. (ii) Presence of five $-$OH groups attached to different carbon atoms.

5.
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.

6.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr