I am posting model paper which i have downloaded from a site some time back . I thought I should post  it here for quick revision of those who have not gone through this paper . Actually this is set of three papers and i will post answers and other papers only after geting your response . I mean if you are already having these papers than there is no need of  further posting . But I gone throgh all these three they are good for revision(1 or 2 mistakes there). Please let me know through your replies you need answers and other papers too

  Once again I am not claiming that this  paper is of mine it is downloaded from a site i am sharing with you

Q. 1.    Name a salt that can be added in AgCl so as to produce cation vacancies.                      1

Q. 2. What type of deviation from ideal behaviour will be shown by the solution of chloroform and acetone ?                                                                                                                                        1

Q. 3.    What happens when a colloidal sol of Fe [OH]3 is mixed with that of AS2S3 ?                   1

Q. 4.    Why NCl3 gets hydrolysed and NF3 does not ?                                                                        1

Q. 5.    What is the order of reaction whose rate constant has same unit as the rate of reaction ? 1

Q. 6.    Why aldehydes are more reactive than ketones towards nucleophilic substitution reaction ? 1

Q. 7.    Write difference between multimolecular and macromolecular colloid ?                            1

Q. 8.    Why phenol is more acidic than ethanol ?                                                                               1

                                                           k

Q. 9.    Consider the reaction A ———® P. The change in concentration of A with time is shown in the following plot :

            (i)         Predict the order of the reaction.

            (ii)        Derive the expression for the time required for the completion of the reaction.     2

Q. 10.  How do you account for the increase in the molar conductivity in care of KCl and CH3COOH on dilution ?                                                                                                                                         2

Q. 11.  How can the constant k and n of the Freundlich adsorption equation be calculated using graph ? Explain.                                                                                                                                           2

Q. 12.  For the cell reaction :

                        Ni (s) / Ni2– (aq) // (aq) Ag+ (aq) / Ag

            Calculate the equilibrium constant at 25 °C. How much maximum work would be obtained by operation of this cell ?

                        E° Ni2+/Ni = – 0.25 V and E° Ag+/Ag = 0.80 V

Q. 13.  The rate constant of a reaction is 1.5 × 107 s–1 at 50 °C and 4.5 × 107 s–1 at 100 °C. Calculate activation energy.                                                                                                                          2

Q. 14.  (i)         Write the value of Van’t Hoff factor for H2SO4.

            (ii)        Why rusting of iron is quicker in saline water ?                                                           2

Q. 15.  (i)         Why H3PO4 is tripotic whereas H3PO3 is diprotic ?

            (ii)        Give reason why NO2 dimenises to form N2O4 ?                                                          2

Q. 16.  Difference between :

            (i)         Starch and Cellulose

            (ii)        Reducing and Non-Reducing sugar                                                                             2

Q. 17.  (i)         What do you understand by denaturation of proteins ?

            (ii)        Write the two important functions of nucleic acid.                                                       2

Q. 18.  (i)         Explain ethylamine is souble in H2O whereas aniline is not.

            (ii)        What are ambident nucleophiles ? Explain with example.                                        2

Q. 19.  (i)         Zinc Oxide is white but it turns yellow on heating, explain why ?

            (ii)        Aluminium crystallises in a cubic close packed structure. Its metallic radius is 125 pm.

                        (A)       What is the length of the side of the unit cell ?

                        (B)       How many unit cells are there in 1.00 cm³ of aluminium ?                   2+1=3

Q. 20.  (i)         State Henry’s law.

            (ii)        Arrange the following solution in the increasing order of their osmotic pressure :

                        (a)       34.2 g / lit sucrose (C12H22O11)

                        (b)       60 g / lit urea [NH2CONH2]                                                                          2+1=3

Q. 21.  (i)         What is the role of graphite rod in the electrometallurgy of aluminium ?

            (ii)        Write the principle of zone refining method.

            (iii)       Out of C and CO, which is a better reducing agent for ZnO.                                     3

Q. 22.  (i)         Which alkyl halide from the following pair would you expect to react more rapidly by an SN² mechanism and why ?

            (ii)        Write the chemical equation for the following conversion :

                        2-chloro propane to 1-bromo propane

            (iii)       Complete the following equation :

                                                                                    3

Q. 23.  Write short notes on :

            (i)         Reimer Tiemann reaction

            (ii)        Friedel Craft reaction

            (iii)       Aldol Condensation.                                                                                                         3

OR

            (i)         Write IUPAC name of the following compound :

            (ii)        Explain why is ortho-nitrophenol more acidic than orthomethoxyphenol ?

            (iii)       Distinguish between propanone and propanol.                                                          3

Q. 24.  (i)         Arrange the following in increasing order of basic strength :

                        C6H5NH2, C6H5N (CH3)2, (C2H5)2 NH and CH3NH2

            (ii)        Complete the following giving appropriate represent :

               Benzyl                   Benzyl                               Benyzlamine

            chloride                  nitromethane

            (iii)       Write Hofmann’s Bromamide reaction.                                                                          3

Q. 25.  (i)         [NiCl4]2– is paramagnetic while [Ni (CO)]4 is diamagnetic though both are tetrahedral. Why ?

            (ii)        Write IUPAC name of [CO (en)₃]³⁺

            (iii)       Explain why K3[Fe (CN)6] is more stable than K4 [Fe (CN)6].                                      3

Q. 26.  (i)         Write the name of monomers of the following polymers :

                        (A)       Nylon-6

                        (B)       Terylene.

            (ii)        Write free radical mechanism for the polymerisation of ethene.

            (iii)       What is the full form of PHBV ?                                                                                      3

Q. 27.  (i)         Explain the following terms with suitable examples :

                        (A)       Narrow spectrum antibiotic

                        (B)       Non ionic detergents.

            (ii)        Label the hydrophilic and hydrophobic part in the given compound :

                        CH3 (CH2)10 CH2 SO3– Na+

            (iii)       Write the constituents of dettol.                                                                                       3

Q. 28.  (i)         Arrange HClO4, HClO3, HClO2, HClO in order of increasing acidic strength. Give reason.

            (ii)        Why inter halogen are more reactive than halogens ?

            (iii)       OF2 should be called oxygen difluoride and not fluorine oxide. Why ?

            (iv)       Why HF acid is stored in wax coated glass bottles ?

            (v)        SF6 is known but SH6 is not known. Explain.                                                               5

OR

            (i)         Deduce the molecular shape of BrF3 or the basis of VSEPR theory.

            (ii)        Arrange NH3, PH3, AsH3, SbH3, BIH3 in order of increasing acidic strength.

            (iii)       Why do noble gases form compound with oxygen and fluorine only ?

            (iv)       Write balanced equation for the following :

                        (a)       NaCl is heated with sulphuric acid in presence of MnO2.

                        (b)       Cl2 gas is passed into a solution of NaI in water.                                             5

Q. 29.  (i)         What is the effect of pH on the K2Cr2O7 solution ?

            (ii)        Transition metal exhibit higher enthalpies of atonisation, explain why ?

            (iii)       Why the transition metal generally form coloured compounds ?

            (iv)       Which out of the following are transition element and why ?

                        Zn, Ag, Cd, Au

            (v)        Why is the separation of lanthanide elements difficult ?                                           5

OR

            (i)         Transition metal and their many compounds act as good catalyst.

            (ii)        Actinoid contraction is greater from element to element than lanthanoid contraction. Why ?

            (iii)       K2PtCl6 is a well known compound whereas corresponding Ni compound is not known. State a reason for it.

            (iv)       A mixed oxide of Iron and Chronium FeO . Cr2O3 is fused with Na2CO3 in presence of air to form a yellow coloured compoud A. On acidification the compound (A) form an orange coloured compound (B) which is a strong oxidizing agent.

                        (a)       Identify A and B.

                        (b)       Write balanced chemical equation for each step.                                           5

Q. 30.  An organic compound contain 69.77% carbon, 11.63% hydrogen and rest oxygen. The molecular mass of compound is 86. It does not reduce Tollen’s reagent but form an addition compound with sodium hydrogen sulphide and give positive iodoform test. On vigorous oxidation it gives ethanoic and propanoic acid. Write the possible structure of the compound.                   5

OR

            An organic compound (A) having molecular formula C9H10O form an orange red precipitate (B) with 2, 4 — DNP reagent. Compound (A) gives a yellow precipitate (C) when heated in the presence of iodine and NaOH along with a colourless compound (D). (A) does not reduce Tollen’s reagent or Fehling’s solution nor does it decolourise Bromine water. On drastic oxidation of (A) with chromic acid, a carboxylic acid (E) of molecular formula C7H6O2  is formed. Deduce the structure of organic compounds A
to E.