Model Question for Chemistry For JAC 2018 examination Set - 01

Chemistry

Full Marks-70                                                                                                  Pass Marks - 23

                                                                                                                        Time-3 Hours

General instructions:

(i) All questions are Compulsory.

(ii)Question Nos. 1 to 8 are multiple Choice Type which carry 1 mark each.

(iii)Question Nos. 9 to 15 are very short Answer Type which carry 1 mark each.

(iv) Question Nos. 16 to 23 are short Answer Type -I which carry 2 marks each.

(v)Question Nos. 24 to 31 are short Answer Type - II which carry 3 marks each.

(vi) Question Nos. 32 to 34 are Long Answer Type which carry 5 marks each.

(Multiple Choice Type Question)

1). The packing fraction for the body centred cube is:

a) 0.42                         
b) 0.68                        
c) 0.52                         
d) 0.74

2). Solubility of gas in liquid increases with :

(a) Increase of Pressure & increases of Temperature.

(b) Decrease of Pressure & increase of Temperature.

(c) Increase of Pressure & decrease of Temperature.

(d) Decrease of Pressure & Temperature.

3). One faraday is equal to:

a) 9650 columb          
b) 10,000 columb        
c) 19640 columb         
d) 96500 columb

4). Rate constant of a reaction depends on

a). Temperature                       
b). Mass                       
c). Weight                  
d). Catalyst

5). Common impurities present in Bauxite are:

(a) Fe₂O₃                     
(b) ZnO                       
(c) SiO₂                       
(d) CaO

6). Alkyl halide when reacts with aqueous KOH solution gives

(a) Alkane                   
(b) Alkene                   
(c) Alcohol                  
(d) Aldehyde

7). Power alcohol is a mixture of

(a) CH₃OH + C₂H₅OH                                   
(b) C₂H₅OH + Petrol + Benzene

(c) CH₃OH + C₂H₅OH + Ether                      
(d) None

8). Tranquilizers are substance used for the treatment of :

a) Cancer                    
b) AIDS                      
c) Mental diseases                   
d) Blood infection.

(Very short Answer Type Questions)

9). What is the Particle Size of Colloidal Suspension?

10). For the reaction NH₄ NO₂ → N₂ + 2H₂O what is the order of reaction?

11). Draw the structure of DDT.

12). Name the monomers of Dacron (Terrylene).

13). Arrange C₂H₅Cl,C₂H₅Br and C₂H₅I  in increasing order of their boiling

Points.

14). Write down the name of the product obtained on hydrolysis of sucrose.

15). Write Name of three Artificial sweetening agents.

(Short Answer Type I Questions)

16). Distinguish between electro chemical cell and electrolytic Cell.

17). Complete the following :

(i) CH₃CH₂Br + KOH (aq.) →

(ii) C₂H₅Cl + C₂H₅ONa →

18). What is role of silica in the metallurgy of Copper?

19). What is difference between calcination and roasting?

20). Why tranisition elements shows variabble oxidation State?

21). How are Synthetic detergents better than Soaps?

22). Differenciate between thermoplastic and thermosetting plastic.

23). What are differences between DNA and RNA?

(Short Answer Type II Questions)

24). Silver Crystallises in a fee lattice. The length of the edge of the unit cell is 4.077 x 10^-8cm and the density of silver is 10.5 g cm^-1. Calculate the atomic mass of silver?             

25). 31. Complete the following reaction:

(i) Cr₂O₇^2- +H⁺ + Fe²⁺            →

(ii) MnO₄^- + I^- + H⁺              →

(iii)  MnO₄^- + C₂O₄^2- + H⁺   →

26). Discuss the factor which influence rate of reaction.

27). Define any two of the following terms.

(i) Lyophilic Sol          (ii) Adsorption            (iii) Macromolecular Colloid

28). Describe the method of preparation of K₂Cr₂O₇ from Chromite ore.

29). (i) What is Henry's Law?

(ii) The vapour pressure of Pure Water at 20⁰C is 17.5 mm of Hg. A Soulution of Sucrose is Prepared by dissolving 68.4 g of Sucrose in 1000 g of Water.  Caculate the vapour Pressure of the Solution.?

30). Write the IUPAC name of the following compound

(a) K₄[Fe(CN)₆]                       (b) Na₃[AIF₆]              (c) [Fe(H2O)₆] SO₄

31). Write Short notes on two of the following:

(i) Carbylamine reaction                      (ii) Hofmann's bromamide reaction    (iii) Coupling reaction.

(Long Answer Type Question)

32). Discuss the general characteristics of Group 16 elements with reference to:

(i)Oxidation state        (ii) lonisation enthalpy and     (iii) electron gain enthalpy.

33). How will you bring about the following transformation?:

(i) ethyl ammine to Ethanol                              (ii) Phenol to Aniline

(iii) Diethyl ether to Ethanol acid                  (iv) Acetylene to acetaldehyde

(v) Acetaldehyde to ethyl alcohol

34). Write short notes on any three of the following:

(i) Carbyl amine reaction                                             (ii) Fittig reaction

(iii) Gattermann reaction                                             (iv) Hofmann's bromamide reaction.

Thank You.
Anjani Kumar Singh.