viteeechemistry

Document Sample
viteeechemistry Powered By Docstoc
					VITEEE Solution - 2007                     CHEMISTRY




                                     PART – II (CHEMISTRY)
  41.     An ion leaves its regular site occupy a position in the space between the lattice sites is called
  Ans : (A)Frenkel defect
  42.     The 8 : 8 type of packing is present in
  Ans : (B)CsCl
  43.     When a solid melts reversibly
  Ans : (D)S increases
  44.     Enthalpy is equal to
                2   (G / T ) 
  Ans :   (A) T   T 
                              P

  45.     Condition for spontaneity in an isothermal process is
  Ans : (C) A + U > 0
  46.     Given :
          2C(s) + 2O2(g)  2CO2(g) ;                            H = - 787 KJ
                  1
          H2(g) +    O2(g)  H2O(l) ;                           H = - 286 KJ
                   2
                      1
          C2H2(g) + 2 O2(g)  2CO2(g) + H2O(l)                  H = - 1310 KJ
                       2
          The heat of formation of acetylene is
  Ans : (C)+ 237 KJ
  47.     Given the equilibrium system :
          NH4Cl(s)  NH4+(aq) + Cl- (aq) (H = +3.5 kcal/mol). What change will shift
          The equilibrium to the right ?
  Ans :      (B)increasing the temperature
  48.     According to Arrhenius equation, the rate constant (k) is related to temperature (T) as
                 k 2 Ea  1   1 
  Ans :   (A) In         
                 k1   R  T1 T 2 

  49.     Equivalent amounts of H 2 and I2 are heated in a closed vessel till equilibrium is obtained. If 80%
          of the hydrogen can be converted to HI, the Kc at this temperature is
  Ans : (A) 64

  50.   For the reaction H2(g) + I2(g)  2HI(g), the equilibrium constant Kp changes with
  Ans : (A) the amount H2 and I2

  51.     How long (in hours ) must a current of 5.0 amperes be maintained to electroplate 60 g of calcium
          from molten CaCl 2 ?
  Ans : (D) 16 hours
VITEEE Solution - 2007                       CHEMISTRY




  52.   For strong electrolyte the plot of molar conductance vs C is
  Ans : (B) linear
  53.   If the molar conductance values of Ca 2+ and Cl - at infinite dilution are respectively 118.88 x 10 -
          4
           m2 mho mol-1 and 77.33 x 10 -44m2 mho mol -1 then that of CaCl 2 is (in m2 mho mol -1)
  Ans : (C) 273.54 x 10-4
  54.     The standard reduction potentials at 298 K for the following half reactions are given against
          each
          Zn2+(aq) +2e-  Zn(s)    E0 = - 0.762 V
          Cr3+(aq) +3e-  Cr(s)    E0 = - 0.740 V
          2H+(aq) +2e-  H2(g)     E0 = - 0.00 V
          Fe3+(aq) +3e-  Fe2+(aq) E0 = + 0.762 V
          the strongest reducing agent is
  Ans : (A) Zn(s)

  55.     The epoxide ring consists of which of the following
  Ans : (A) Three membered ring with two carbon and one oxygen
  56.     In the Grignard reaction , which metal forms an organometallic bond ?
  Ans : (C) Magnesium
  57.     phenol is less acidic than
  Ans : (B) p-nitrophenol
  58.     Aldol condensation is given by
  Ans : (B) acetaldehyde
  59.     Give the IUPAC name for
                         O                         O
              H3C  CH2  C  H2C  CH2 C  OCH3

  Ans : (D) methyl – 4- oxohexonate

  60.     In which of the below reaction do we find , - unsaturated carbonyl compounds undergoing a
          ring closure reaction with conjugated dienes ?
  Ans : (A) Perkin reaction
  61.     The catalyst used in Rosenmund reaction is
  Ans : (B) Pd/BaSO4
                                       H2O
  62.     (CH2CO)2 O + RMgX                    ?

  Ans : (B) RCOCH2CH2COOH
  63.     Identify, which of the below does not possess any element of symmetry ?
  Ans : (A) (+) – Tartaric acid
  64.     The weakest acid amongst the following is


                                th
VITEEE Solution - 2007                    CHEMISTRY




  Ans : (B) HCOOH
                                                       H2SO4
  65.     HOOC  (CH2 )4 COOH + C2H5OH                            C2H5OOC  CH2  COOC2H5
                                                       Toluene
          The purpose of using toluene here is
  Ans : (D) because of the formation of low boiling azotrope
  66.     Trans esterification is the process of
  Ans : (D) Conversion of an ester into its components namely acid and alcohol
  67.     The correct sequence of base strengths in aqueous solution is
  Ans : (A) (CH3)2 NH > CH3NH2 > (CH3)3 N
  68.     When aqueous solution of benzene diazoniumchloride is bolled, the product formed is
  Ans : (D) C6H5OH
  69.     Carbylamine reaction is given by aliphatic
  Ans : (A) Primary amine
  70.                    NH3
          C6H5CHO                    ?
                        H2, Ni

  Ans : (C) C6H5CH2NH2

  71.   In TeCl4 the central atom tellurium involves
  Ans : (B) sp3d hybridization

  72.   The purple colour of KMnO 4 is due to the transition
  Ans ; (C) d – d

                                  235 U                            90
                                   92                              36   Kr
  73.     A nuclear reaction of          with a neutron produces             and two neutrons . Other
          element produced in this reaction is
  Ans :   (D) 144 Ba
               56


  74.   AgCl dissolves in a solution of NH 3 but not in water because
  Ans : (B) Ag+ forms a complex ion with NH3
  75.     Which of the following is hexadenate ligand ?
  Ans : (B) ethylene diamine tetra acetic acid
  76.     Accordinate bond is a dative covalent bond . Which of the below is true ?
  Ans : (C) Two atoms form bond and one of them provides both electrons
  77.     Which of the following complex has zero magnetic moment (spin only)?
  Ans : (D) K4[Fe(CN)6]

  78.     The IUPAC name of [ni(PPh 3)2 Cl2]2+ is
VITEEE Solution - 2007                  CHEMISTRY




  Ans : (B) dichloro bis (triphenylphosphine) nickel (II)
  79.    Among the following the compound that is both paramagnetic and colloured is
  Ans : (A) K2Cr2O7

  80.    On an X – ray diffraction photograph the intensity of the spots depends on
  Ans : (B) electro density of the atoms/ions




                              th

				
DOCUMENT INFO
Shared By:
Stats:
views:5
posted:9/14/2012
language:
pages:4
Description: PREVIOUS YEAR PAPERS CBSE BOARD EXAM AIEEE BITSAT ISAT VITEEE IIT-JEE STUDY MATERIAL PHYSICS CLASS XI XII SAMPLE PAPERS KEY SOLUTIONS ANSWERS QUESTIONS