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Sunday, November 29, 2015

S.B. Roll No……….
2nd Exam/Common/0451/5404/Dec’11

Duration : 2½ Hrs                                                                                   M. Marks: 75

1.     Reducing agent is a substance which can
(a)  Accept electrons
(b) Accept protons
(c)  Donate electrons
(d) Donate protons
2.     E.C.E is more for
(a)  Hydrogen
(b) Copper
(c)  Zinc
(d) Silver
3.     During electrolysis, all ions
(a)  Move in the same direction
(b) Move towards oppositely charged electrode
(c)  Remains stationary
(d) None of these
4.     Electric current is the flow of
(a)  Ions
(b) Atoms
(c)  Electrons
(d) None of these
5.     When aqueous sodium chloride is electro lysed, the product obtained at the cathode is
(a)  Hydrogen
(b) Chlorine
(c)  Sodium metal
(d) Oxygen
6.     The reactions in which oxidation and reduction go side by side called
(a)  Oxidation reaction
(b) Reduction reaction
(c)  Redox reaction
(d) Exothermic reaction
7.     In the electroplating of metals, anode is made up of
(a)  Pure metal
(b) Impure metal
(c)  Both a and b
(d) Electrolyte
8.     Tetravalency of carbon can be explained by
(a)  Resonance
(b) Hybridization
(c)  Inductive effect
(d) None of these
        9.Graphite is used as electrodes because ‘it has the property of:
(a) Good conduction of electricity
(b) Bad conduction of electricity
(c) Metallic lustre
(d) None of these
       10. The property of self linking of carbon atoms is known as
          (a) Catenation
(b) Polymerization
(c) Carbonization
(d) None of these
11. The common name of H3COOH is:
(a)Formic acid
(b) acetic acid
(c) carbonic acid
(d) None of these
12. Hydrocarbons containing triple bonds are known as:
(a) Alkanes
(b) Alkenes
(c) Alkynes
(d) None of these
13. Cyanides are also known as
(a) Alkane nitriles
(b) Imines
(c) amines
(d) amides
14. The organic compound present in vinegar is:
(a) Ethanoic acid
(b) propanoic acid
(c) methanoic acid
(d) butanoic acid
15. The aromatic smell of flowers is due to the presence of:
(a) Alcohols
(b) acids
(c) esters
(d) amines
16. Which of the following is not one of the seven fundamental units?
(a) Kilogram
(b) Candela
(c) Mole
(d) Watt
17. I calorie=……………….Joules
(a) 4.2
(c) 4.6
(d) 4.9
18.Freezing point of water at 1 atm pressure of Kelvin scale is
(a) 0K
(b) 1K
(c) -273K
(d) +273K
19. Which of the following is not an element?
(a) Diamond
(b) Graphite
(c) Ozone
(d) Sand
20. Which of the following is a metalloid?
(a) Antimony
(b) Aluminium
(c) Copper
(d) Silver
21. Which has the maximum viscosity?
(a) Water
(b) Glycol
(c) Acetone
(d) ethanol
22. The charge on a cation M is +2 and on anion A is -3. The compound formed has the formula
(a) MA2
(b) M2A3
(c) M3A2
(d) M2A
23. NaCl is a chemical formula of:
(a) Washing soda
(b) baking soda
(c) sugar
(d) common salt
24. Which of the following has the largest number of atoms?
(a) 0.5 g atom of C
(b) .5 g of C
(c) 0.25 mole of C
(d) 1 g of C
25. Mass of 0.40  moles of CO2 is
(a) 40g
26.I a.m.u. is mass of:
(a) 1 atom of C
(b) 12 atoms of C
(c) 1/12th of C atom
(d) 6.022x1023atoms of C
27. Mass of 0.1 mole of CaCO3 is
(a) 1g
(b) 10g
(c) 100g
(d) 1000g
28. Neutrons are present in all atoms except
(a) He
(b) C
(c) H
(d) Ne
29. The designation of an orbital with n=4 and 1=3 is
(a) 4s
(c) 4d
(d) 4f
30. The lightest particle among the following is
(a) Proton
(b) neutron
(c) electron
(d) atom of hydrogen
31. A pie bond is formed by the overlapping of
(a) S-s orbital
(b) s-p orbital
(c) p-p
(d) d-d orbital
32. Series of lines present in visible region of Hydrogen spectrum is
(a) Lyman
(b) Balmer
(c) Paschen
(d) Brackett
33. As we move away from nucleus, the energy of the shell
(a) Decreases
(b) Increases
(c) remains the same
(d) neither decreases nor
34. Which of the following noble gases has lowest atomic number
(a) Ne
(b) He
(c) Kr
(d) Xe
35. The shape of 2s orbital is
(a) Dumbbell
(b) Tetrahedral
(d) Spherical
36. If the mass of an atom is 90 and number of neutrons is 50 its atomic number is
(a) 40
(b) 50
(d) 140
37. The quantum number representing shapes of the electron cloud is
(a) n
(b) I
38. The size of nucleus of an atom is of the order of
(a) 10-8
39. The charge on the electron was found by:
(a) J.J. Thomsan
(b) miliken
(c) Faraday
40. The number of elements present in the 3rd period is
(a) 6
41. Every period in the periodic table ends with
(a) An alkali metal
(b) a halogen
(c) an inert gas
(d)a trasition element
42. The element with atomic number 26 will be found in the group
(a) 4
43.The total number of actinides in the periodic table are
(a) 12
(b) 13
44. The elements of group 16 in periodic table are known as
(a) Alkali metals
(b)alkaline earths
45. Halogens belong to
46. In the periodic table, the position of the element still uncertain is of
47. The purest form of water obtained from natural sources is:
(a) Spring water
(c)sea water
(d)lake water
48. Temporary hardness of water is due to presence of calcium and magnesium
49. The process of destroying the disease producing bacteria or micro-organisms from water is known as
50. Permanent hardness is due to the presence of Ca and Mg as
(a)carbonates only
(b)bicarbonates only
(c)chlorides only
(d)chlorides and sulphates
51. Permanent hardness can be removed by adding
(c)Bleaching powder
52.The chemical name of permutit is:
(a)Potassium zeolite
(b)sodium zeolite
(c)calcium zeolite
(d)magnesium zeolite
53. Hardness can be estimated
(a)Clark’s method
(b)soap titration method
(c)EDTA method
(d)both b and c
54. On boiling water becomes free from:
(a)permanent hardness
(b)temporary hardness
(c)suspended impurities
(d)floating impurities
55. Exhausted permutit is regenerated by washing it with:
56.The temporary hardness of water due to calcium bicarbonates can be removed by:
(a)Bleaching powder
(b)sodium carbonate
(d)Potassium carbonate
57.In hot soda lime process, temporary hardness of water can be removed by
(b)magnesium hydroxide
(c)fine sand layer
(d)coarse sand layer
58. The process of removing extra common salt from water is called:
59. Coagulants help in setting of:
(a) Colloidal particles only
(b)Fine suspended impurities
(c)Suspended impurities only
(d)both a and c
60. A law which governs the effect of conc. On the rate of reaction is called
(a) Dalton law
(b)Le-chatelier’s principle
(c)Law of chem.. equilibriul
(d) Law of mass action
61. Theory of ionization was given by:
62. The conjugate acid of NH2is
63. Ionic product of water changes when
(a)Anacid is added to water
(b)A base is added to water
(c)Both acid and base are added to water
(d)Temp. is changed
64.A buffer mixture of ammonium chloride and ammonium hydroxide is diluted with water, its pH will
(c)remains the same
(d)becomes 7
65. Buffer action of a buffer is due to:
(a)common ion effect
(d)heat production
66. The indicator used in titration of strong acid and strong base is
(b)methyl orange
(d)methyl red
67. HCl is stronger acid than acetic acid because
(a)It can neutralize large quantity of alkali
(b)it can corrode anything it comes in contact
(c)it ionizes completely to ions in aqueous soln.
(d)none of these
68. Hydrolysis of sodium acetate will give:
(a)Basic soln.
(b)acidic soln.
(c)neutral soln.
(d)normal soln.
69. Anaqueous soln. whose pH is O is:
(c) neutral
70. Strong electrolytes are those which:
(a)Dissolve readily in water
(b)conduct electricity
(c)dissociate into ions at high dilution
(d)cannot dissociate into ions
71. The unit of electrochemical equivalent is:
72. One Faraday is equal to
(a)9650 coulombs
(b)39650 coulombs
(c)29650 coulombs
(d)96500 coulombs
73. On electrolys is of dil. H2SO4 soln. between platinum electrodes, this gas evolved at the anode is
74. Which of the following battery is rechargeable?
(a)Dry cell
(b)mercury cell
(c)Ni-Cd cell
(d)H2-O2 cell
75. In electrolytic refining metal to be purified is made as:
(a) Anode


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