Chemistry – Important Question Bank for Chhattisgarh (class 12th) HSSC (HSC) Board Exam 2017

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After the tremendous success of our last year Important Question Bank for Chhattisgarh HSSC (HSC) Board Exam 2016, we have also created a list of  Most Important Question Bank for Chhattisgarh Class XII (class 12) HSC Board Exam 2017 which are likely to appear in HSC Board Exams this year.

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1.Explain the Lab method preparation of CH3CHO in the following points-

(i) Chemical equation

(ii) Labelled diagram

(iii) Method in brief.

2. Explain the Lab. method preparation diethyl ether in the following points-

(i) Chemical equation

(ii) Labelled diagram

(iii) Method in brief.

3. Explain the manufacture of Sulphuric acid from contact process in the following points –

(i) Principle

(ii) Labelled diagram

(iii) Chemical reactions used in the process

4. Explain the manufacture of nitric acid from Ostwald method in the following points –

(i) Principle

(ii) Labelled diagram

(iii) Chemical reactions used in the process

5. Explain the extraction of copper from copper pyrites in the following points –

(i) Formula of ore

(ii) Concentration of ore

(iii) main reactions in roasting

(iv) component of matte

(v) name of one method involved in purification method

6. Explain photography on following points –

(i) Exposure

(ii) Developing

(iii) Fixation

(iv) Printing

(v) Toning

7. Calculate the rate constant of zero order reaction from integrated method.

8. Calculate the rate constant of first order reaction from integrated method.

9. Write any two differences between primary and secondary cell.

10. Calculate the EMF of the following cell at Zn(s) | Zn++ (aq.) || Ag+(aq.) 10M | Ag(s) (1.0M) [Give that EºAg+/Ag = 0.789V, EºZn2+/Zn– = –0.76V]

11. (1) Calculate the Eº of the following cell –

Ag+/Ag = (+) 0.80V, EºCu+2/Cu = +0.34V

(2) Write any two differences between Galvanic cell and Electrolytic cell.

12. Write the structural formulae of the following compounds –

1. Pot. ferr. (III) cyanide

2. Pot. Dicyanoargentate (I)

3. Tetracyanonickelate (II) ion

4. Tetracarbonyl Nickle (O)

13. Write the I.U.P.A.C. name of the following compounds.

i) K4 [Fe(CN)6 ]

ii) [Co(NH3 )6 ]Cl3

iii) K2 [HgI4 ]

iv) [Cu(NH3 )4 ]SO4

14. Write any four differences between physical adsorption and chemical adsorption

15. Prove that ∆ =∆ − ∆ G H TS

16. Determine the molecular mass of non volatile solute with the help of depression in freezing point.

17. Determine the molecular mass of a non volatile solute with the help of elevation of boiling point.

18. Write any three uses of Nuclear fission

19. Compare the basic properties of aliphatic amine, aromatic amine and ammonia

20. What is coordination number ? Write the name of coordination number for octahedral voids

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