CBSE Class 12 Chemistry Question Paper All India with answers 2017 (1)

CBSE Class 12 Chemistry Question Paper All India with answers 2017 (1). Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

CHEMISTRY (Theory)

1. Write the formula of the compound of phosphorus which is obtained when conc. HNO₃ oxidises P₄.

2. Write the IUPAC name of the following compound :

        H₃C - C = C - CH₂ -OH

                  |     |

                 CH₃  Br

3. What is the effect of adding a catalyst on

(a) Activation energy (E_a), and

(b) Gibbs energy (ΔG) of a reaction ?

4. ,which is an example of allylic halide ?

5. What type of colloid is formed when a liquid is dispersed in a solid ? Give an example.

6. (a) CrO₃

   (b) SOCl₂

(a) Arrange the following compounds in the increasing order of their acid strength :

     p-cresol, p-nitrophenol, phenol

(b) Write the mechanism (using curved arrow notation) of the following reaction :

                       OR

Write the structures of the products when Butan-2-ol reacts with the following :

(a) CrO₃

(b) SOCl₂

7.  Calculate the number of unit cells in 8·1 g of aluminium if it crystallizes in a face-centred cubic (f.c.c.) structure. (Atomic mass of Al = 27 g mol^-1)

8.  Draw the structures of the following :

(a) H₂SO₃

(b) HClO₃

9. Write the name of the cell which is generally used in hearing aids. Write the reactions taking place at the anode and the cathode of this cell.

10. Using IUPAC norms write the formulae for the following :

(a) Sodium dicyanidoaurate(I)

(b) Tetraamminechloridonitrito-N-platinum(IV) sulphate

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