Chemistry 13_Objective_Phase IV to VI

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  1. The dissociation energy of CH4 and C2H6 are respectively 360 and 620 kcal/mol. The bond energy of C – C bond (kcal/mol) is

(A) 260                                                            (B) 180

(C) 130                                                            (D) 80


  1. , p1 and p2 are pressure, cell reaction will be spontaneous if

(A) p1 = p2                                                       (B) p1 > p2

(C) p2 > p1                                                       (D) p1 = 1 atm

  1. Cu+ + e ¾® Cu, E0 = x1 Volt, Cu2+ + 2e ¾® Cu, E0 = x2 Volt,

For Cu2+ + e ® Cu+, E0 will be

(A) x1 – 2x2                                                                       (B) x1 + 2x2

(C) x1 – x2                                                       (D) 2x2 – x1


  1. + 8H+ + 5Fe2+  5Fe3+ + Mn2++ 4H2O,  = 0.0591, hence equilibrium constant is

(A) 0.0591                                                       (B) 100

(C) 1000                                                          (D) 105


  1. For octahedral void and tetrahedral void, radius ratio is (in close packing)

(A)                                                        (B)

(C) 0.225 ´ 0.414                                            (D) None


  1. A hypothetical metal (atomic weight = 400) depending on temperature crystallizes in FCC and BCC structures. The ratio of densities in FCC to BCC is

(A) 2                                                                (B) 0.5

(C)                                                        (D)


  1. The element which would be extracted by electrolytic reduction of its oxide dissolved in a high temperature melt is

(A) Na                                                             (B) Mg

(C) F                                                                (D) Al


  1. P, P is major product. So P is

(A)                                 (B)

(C) CH3  – CH2 – CH2 – CHO                        (D) None


  1. Cannizzaro reaction will not be given by
              (D) CCl3CHO


  1. X will

(A) reduce Tollen’s reagent                            (B) give iodoform test

(C) give cannizzaro reaction                           (D) all the above






            (A) CH­3CH2COOH  
            (C) CH3 – CH2 – CH2OH  


  1. Which of the following compounds will give iodoform test

(A) 2-hydroxy propane                                   (B) benzophenone

(C) methyl acetate                                          (D) acetamide


  1. X is a higher phenol and Y is an aromatic carboxylic acid. Separation of a mixture of X and Y can be carried out easily by having a solution in

(A) NaOH                                                        (B) Na­2CO3

(C) Lime                                                          (D) NaHCO3


  1. Methyl tert butyl ether on heating with HI of one molar concentration gives

(A) CH3I + (CH3)3COH                                  (B) CH3OH + (CH3)3I

(C) CH3I + (CH3)3CI                                       (D) None


  1. Benzenediazonium chloride on reaction with phenol in weakly acidic medium gives

(A) Diphenyl ether                                           (B) p-hydroxyazobenzene

(C) chlorobenzene                                          (D) benzene


  1. Acetamide reacts with NaOBr in alkaline medium to form

(A) NH3                                                           (B) CH3NH2

(C) CH3CN                                                      (D) CH3CH2NH2


  1. After the reaction of sodium benzene sulphonate with NaOH, it is hydrolysed by acid, the compound produced is

(A) phenol                                                       (B) benzoic acid

(C) benzene                                                    (D) disodium benzaldehyde


  1. The correct order of acidic strength of following

(I) o-nitrophenol, (II) phenol, (III) 2, 4, 6-Trinitrophenol (IV) 2, 4-dinitrophenol will be

(A) I < II < III < IV                                             (B) II < I < IV < III

(C) IV < III < II < I                                             (D) IV < I < III < II




  1. Which nitrogen oxide is obtained by treating copper with cold dil. HNO3

(A) N2O5                                                         (B) NO2

(C) NO                                                            (D) N2O


  1. Butane nitrile may be prepared by heating

(A) Propyl alcohol with KCN                           (B) Butyl alcohol with KCN

(C) Butyl chloride with KCN                            (D) Propyl chloride with KCN


  1. One of the constituent of german silver is

(A) Ag                                                              (B) Cu

(C) Mg                                                             (D) Al


  1. In the metallurgy of iron, when limestone is added to blast furnace, the calcium ions ends up as

(A) Slag                                                           (B) Gangue

(C) Metallic calcium                                        (D) CaCO3


  1. On heating NaCl + K2Cr2O7 + H2SO4 conc., the gas that comes out is

(A) CrO2Cl2                                                     (B) CrOCl­­2

(C) Cl2                                                             (D) O2


  1. Which of the following pairs of ions cannot be separated by H2S in the presence of dil. HCl acid.

(A) Bi3+, Sn4+                                                  (B) Al3+, Hg2+

(C) Zn2+, Cu2+                                                 (D) Ni2+, Cu2+


  1. In [Cr(H2O)6]3+ ion central metal ion has d-electrons equal to

(A) 2                                                                (B) 3

(C) 4                                                                (D) 5


  1. Which complex is diamagnetic

(A) [Fe(CN)6]4–                                               (B) [Cu(NH3)4]2+

(C) [Ti(H2O)6]3+                                               (D) None


  1. A solution containing 500g of a protein per litre is isotonic with a solution containing 3.42 g of sucrose per litre. The molecular mass of protein is

(A) 5                                                                (B) 146

(C) 34200                                                        (D) 50000


  1. The hydrogen electrode is dipped in a solution of pH = 3 at 25°C. The reduction potential of cell would be

(A) 0.177 V                                                      (B) – 0.177 V

(C) – 0.087 V                                                   (D) – 0.059 V



  1. D                                     62.        B                                                
  2. D                                     64.        D                                     65.        A
  3. A                                     67.        D                                     68.        C               
  4. A                                     70.        D                                     71.        A
  5. B                                     73.        A                                     74.        D               
  6. B                                     76.        B                                     77.        B
  7. A                                     79.        B                                     80.        D               
  8. C                                     82.        D                                     83.        B
  9. A                                     85.        A                                     86.        A               
  10. B                                     88.        A                                     89.        D
  11. B