CBSE Class 12 Physics (For Blind) Question Paper 2019 with Answer Key (March 5)

CBSE Class 12 Physics (For Blind) Question Paper 2019 with Answer Key Set 4 is available for download. The exam was conducted by the Central Board of Secondary Education on March 5, 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 Physics (For Blind) paper was of Moderate level. The question paper comprised a total of 27 questions divided among 4 sections.

CBSE Class 12 Physics (For Blind) Question Paper 2019 with Answer Key (March 5)

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CBSE Class 12 Previous Year Question Papers

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CBSE CLASS XII Questions

1.
Write mechanism of acid dehydration of ethanol to ethene.

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

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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.
Why is o-nitrophenol more acidic than o-methoxyphenol?

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6.
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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CBSE Class 12 Physics (For Blind) Question Paper 2019 with Answer Key (March 5)

CBSE Class 12 Physics (For Blind) Question Paper 2019 with Answer Key (March 5)

CBSE Class 12 Previous Year Question Papers

CBSE CLASS XII Questions

1.
Write mechanism of acid dehydration of ethanol to ethene.

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

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

5.
Why is o-nitrophenol more acidic than o-methoxyphenol?

6.
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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CBSE Class 12 Physics (For Blind) Question Paper 2019 with Answer Key (March 5)

CBSE Class 12 Previous Year Question Papers

CBSE CLASS XII Questions

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

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

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

5.Why is o-nitrophenol more acidic than o-methoxyphenol?

6.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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1.
Write mechanism of acid dehydration of ethanol to ethene.

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

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

5.
Why is o-nitrophenol more acidic than o-methoxyphenol?

6.
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