Chemistry Objective_Questions Phase I to III

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  1. The hardness of water is usually expressed in

(A) ppm                                                           (B) g/litre

(C) mol/litre                                                     (D) litre/gm


  1. Avogadro’s number is the no. of molecules present in

(A) 22.4 litre of a gas at NTP                          (B) 1 mole of a substance

(C) g mole weight of a substance                   (D) All


  1. How many g of glucose (C6H12O6) be dissolved to make one litre solution of 10% glucose.

(A) 10g                                                            (B) 180g

(C) 100g                                                          (D) 1.8g


  1. The molarity of pure water is

(A) 55.6                                                           (B) 50

(C) 100                                                            (D) 18


  1. The equivalent weight of MnSO4 is half of its molecular weight when it is converted to

(A) Mn2O3                                                       (B) MnO2

(C) MnO4                                                        (D) MnO4–2


  1. Which does not have linear shape

(A) CO2                                                           (B) CH4

(C) C2H2                                                          (D) HgCl2


  1. K+, Cl, Ca+2, S–2 ions are isoelectronics. The decreasing order of size is

(A) S–2 > Cl > K+ > Ca+2                                (B) Ca+2 > K+ > Cl > S–2

(C) K+ > Cl > Ca+2 > S–2                                (D) Cl > S–2 > Ca+2 > K+


  1. In HCHO carbon atom has hybridisation

(A) sp                                                              (B) sp2

(C) sp3                                                             (D) sp3d


  1. Which has the largest first ionization energy

(A) Li                                                               (B) Na

(C) K                                                                (D) Rb


  1. 2Fe+3(aq) + Sn+2(aq) ¾® 2Fe+2(aq) + ?

The missing term in this reaction is

(A) Sn+4                                                           (B) Sn+2

(C) Sn                                                              (D) Sn+7


  1. A certain buffer solution contains equal concentration of X and HX. The Kb for X is 10–10. The pH of the buffer is

(A) 4                                                                (B) 7

(C) 10                                                              (D) 14


  1. The conjugate base of H3+O is

(A) H+                                                              (B) H2O

(C) H2O2                                                         (D) H


  1. The Cu++ ion is

(A) Weakly acidic                                           (B) Weakly basic

(C) neither acidic non basic                            (D) strongly acidic


  1. What is the increasing order of acidity among the following compounds

(i) HI                                                                (ii) HF

(iii) HCl                                                            (iv) HBr

(A) ii < iii < iv < i                                               (B) i < ii < iii < iv

(C) i < iv < iii < ii                                               (D) iii < ii < iv < i


  1. Which one is the strongest acid?

(A) HOCl                                                         (B) HOClO

(C) HOClO2                                                    (D) HOClO3


  1. The rate constant of reaction depends upon

(A) temperature                                              (B) initial concentration

(C) time of reaction                                         (D) extent of reaction


  1. Conjugate base of is

(A) NH3                                                           (B) H2O

(C)                                                           (D)


  1. The equilibrium of the reaction N2(g) + 3H2(g) 2NH3(g) will shift to product side when

(A) Kp > 1                                                        (B) Q < Kp

(C) Q = Kp                                                       (D) Q = 2Kp


  1. It is found that equilibrium constant increases by a factor of four when the temperature is increased from 25°C to 40°C. The value of DH is

(A) 25.46 kJ                                                    (B) 171.67 kJ

(C) 89.43 kJ                                                    (D) 71.67 kJ


  1. Which of the following is true for the equilibrium of the reaction

C(s) + H2O(g)  CO(g) + H2(g)

(A)                                                 (B)

(C)                                              (D)


  1. The widely used plastic, PVC is polymerisation product of

(A) CH2=CH2                                                  (B) CF2 = CF2

(C) CH2 = CH—CH2—Cl                               (D) CH2=CH—Cl


  1. Each of the following compound is expected to be optically active except


            (C) methyl-2-methyl propanoate (D) methyl-2-chloro propanoate


  1. Acetyl acetone can exhibit one of the following kind of isomerism

(A) Metamerism                                              (B) Optical activity

(C) tautomerism                                              (D) Ring  chain isomerism


  1. What is the end product of the following sequence of operations

CaC2 A  B

(A) Methyl alcohol                                           (B) Acetaldehyde

(C) Ethyl alcohol                                             (D) Ethylene


  1. Arrange the following in decreasing order of basicity



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

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


  1. Molecule in which distance between the two adjacent carbon atoms is largest is

(A) Ethane                                                       (B) Ethene

(C) Ethyne                                                       (D) Benzene


  1. Arrange the following in order of decreasing enol content



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

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


  (A) (B)
  (C) (D)



  1. The correct statement about the compounds A, B and C is



(A) A and B are homomers                            (B) A and B are diastereomers

(C) A and C are enantiomers                         (D) A and B are enantiomers


  1. The hydrocarbon which decolourises alkaline KMnO4 solution, but does not give any precipitate with ammoniacal AgNO3 is

(A) Benzene                                                    (B) Acetylene

(C) Propyne    (D) 2-Butyne




  1. A 62.       D                     63.       C                     64.       A        
  2. B                     66.       B                     67.       A                     68.       B                    
  3. A 70.       A                     71.       A                     72.       B        
  4. A 74.       A                     75.       D                     76.       A
  5. A 78.       B                     79.       D                     80.       A        
  6. D                     82.       C                     83.       C                     84.       B        
  7. D                     86.       A                     87.       A                     88.       C
  8. D                     90.       D