CBSE Class 12 Biology Question Paper 2018 with Answer Key (March 27, Set 1

CBSE Class 12 Biology Question Paper 2018 with Answer Key Set 1 - 57/1 is available for download. The exam was conducted by the Central Board of Secondary Education on March 27, 2018 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 Biology paper was of Moderate level. The question paper comprised a total of 26 questions divided among 5 sections.

CBSE Class 12 Biology Set 1 - 57/1 Question Paper 2018 with Answer Key (March 27)

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CBSE Class 12 Previous Year Question Papers

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CBSE CLASS XII Questions

1.
Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?

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2.
61 g benzoic acid (M = 122 g mol$^{-1}$) dissolved in 500 g benzene. Vapour pressure of pure benzene = 66 torr. Assume complete dimerisation. Calculate vapour pressure of solution.

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3.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

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

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CBSE Class 12 Biology Question Paper 2018 with Answer Key (March 27, Set 1 - 57/1)

CBSE Class 12 Biology Set 1 - 57/1 Question Paper 2018 with Answer Key (March 27)

CBSE Class 12 Previous Year Question Papers

CBSE CLASS XII Questions

1.
Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?

2.
61 g benzoic acid (M = 122 g mol$^{-1}$) dissolved in 500 g benzene. Vapour pressure of pure benzene = 66 torr. Assume complete dimerisation. Calculate vapour pressure of solution.

3.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

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

5.
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

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

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CBSE Class 12 Biology Set 1 - 57/1 Question Paper 2018 with Answer Key (March 27)

CBSE Class 12 Previous Year Question Papers

CBSE CLASS XII Questions

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

2.61 g benzoic acid (M = 122 g mol$^{-1}$) dissolved in 500 g benzene. Vapour pressure of pure benzene = 66 torr. Assume complete dimerisation. Calculate vapour pressure of solution.

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

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

5.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

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

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1.
Which isomer of $C_4H_9Br$ is most reactive towards $S_N1$ reaction?

2.
61 g benzoic acid (M = 122 g mol$^{-1}$) dissolved in 500 g benzene. Vapour pressure of pure benzene = 66 torr. Assume complete dimerisation. Calculate vapour pressure of solution.

3.
Draw the structures of major products: (a) Chlorobenzene + $CH_3Cl$ / Na, dry ether
(b) p-Hydroxyphenethyl alcohol + HBr

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

5.
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

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