Applied Chemistry, Basic Chemistry ,MCQ Question Paper of BE 1 and 2 Semester,Download Previous Years Question Paper 6

S.B. Roll No……….

APPLIED CHEMISTRY-II

2^nd Exam/Common/0451/5404/Dec’11

Duration : 2½ Hrs                                                                                   M. Marks: 75

1.     The temporary hardness of water due to calcium bicarbonates can be removed by:

(a)  Bleaching powder

(b) Sodium carbonate

(c)  Chlorine

(d) Potassium carbonate

2.     In hot soda lime process, temporary hardness of water can be removed by

(a)  Lime

(b) Magnesium hydroxide

(c)  Fine sand layer

(d) Coarse sand layer

3.     The process of removing extra common salt from water is called:

(a)  De-ionization

(b) Desalination

(c)  Disinfection

(d) Softening

4.     Coagulants help in setting of:

(a)  Colloidal particles only

(b) Fine suspended impurities

(c)  Suspended impurities only

(d) Both a and c

5.     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

6.     Theory of ionization was give by:

(a)  Bohr

(b) Arrhenius

(c)  Rutherford

(d) Newton

7.     The conjugate acid of NH₂­ is

(a)  NH₃

(b) NH₄

(c)  NH₂OH

(d) N₂H₄

8.     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.

9.     A buffer mixture of ammonium chloride and ammonium hydroxide is diluted with water, its pH will

(a)  Increases

(b) Decreases

(c)  Remains the same

(d) Becomes 7

10.                     Buffer action of a buffer is due to:

(a)  Association

(b) Common ion effect

(c)  Dissociation

(d) Heat production

11.                     The indicator used in titration of strong acid and strong base is

(a)  Litmus

(b) Methyl orange

(c)  Phenolphathalein

(d) Methyl red

12.                     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

13.                     Hydrolysis of sodium acetate will give:

(a)  Basic soln.

(b) Acidic soln.

(c)  Neutral soln.

(d) Normal soln.

14.                     Anaqueous soln, whose pH is O is:

(a)  Alkaline

(b) Acidic

(c)  Neutral

(d) Amphoteric

15.                     Strong electrolytes are those which:

(a)  Dissolve readily in water

(b) Conduct electricity

(c)  Dissociate into ions at high dilution.

16.                     The unit of electrochemical equivalent is:

(a)  Gram

(b) Gram/ampere

(c)  Gram/coulombs

(d) Coulombs/gram

17.                     One faraday is equal to

(a)  9650 coulombs

(b) 39650 coulombs

(c)  29650 coulombs

(d) 96500coulombs

18.                     On elctrolys is of dil. H₂SO₄ soln. between platinum electrodes, this gas evolved at the anode is
(a) O₂

(b)SO₂

(c)H₂

(d) SO₂

19. Which of the following battery is rechargeable?

(a) Dry cell

(b) Mercury cell

(c) Ni-Cd cell

(d) H2-O2 cell

20. In electrolytic refining metal to be purified is made as:

(a) Anode

(b) Cathode

(c) Neutral

(d) None

21. Reducing agent is a substance which can

(a) Accept electrons

(b) Accept protons

(c) Donate electrons

(d) donate protons

22. E.C.E is more for

(a) Hydrogen

(b) copper

(c) zinc

(d) silver

23.During electrolysis, all ions

(a) Move in the same direction

(b) Move towards oppositely charged electrode

(c) Remains stationary

(d) None of these

24. Electric current is the flow of

(a) Ions

(b) Atoms

(c) Electrons

(d) None of these

25. When aqueous sodium chloride is electro lysed, the products obtained at the cathode is

(a) Hydrogen

(b) Chlorine

(c) sodium metal

(d) oxygen

26.The reactions in which oxidation and reduction go side by side are called

(a) Oxidation reaction

(b) Reduction reaction

(c) Redox reaction

(d) Exothermic reaction

27. In the electroplating of metals, anode is made up of

(a) Pure metal

(b) Impure metal

(c) both a and b

(d) electrolyte

28. Tetravalency of carbon can be explained by

(a) Resonance

(b) Hybridization

(c) Inductive effect

(d) none of these

29.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

30. The property of self  linking of carbon atoms is known as

(a) Catenation

(b) Polymerization

(c) Carbonization

(d) none of these

31. The common name of H_3­CCOOH is:

(a) Formic acid

(b) Acetic acid

(c) Carbonic acid

(d) None of these

32. Hydrocarbons containing triple bonds are known are:

(a) Alkanes

(b) Alkenes

(c) alkynes

(d) None of these

33. Cyanides are also known as:

(a) Alkane nitriles

(b) Imines

(c) amines

(d) amides

34. The organic compound present in vinegar is:

(a) Ethanoic acid

(b) Propanoic acid

(c) Methanoic acid

(d) Butanoic acid

35. The aromatic smell of flowers is due to the presence of:

(a) Alcohols

(b) Acids

(c) Esters

(d) Amines

36. Which of the following is not one of the seven fundamental units?

(a) Kilogram

(b) Candela

(c) Mole

(d) Watt

37. I calorie ………………Joules

(a)4.2

(b) 4.8

(c) 4.6

(d) 4.9

38. Freezing point of water at I atm pressure of Kelvin scale is

(a) 0 K

(b) 1 K

(c) -273 K

(d) +273K

39. Which of the following is not an element?

(a) Diamond

(b) Graphite

(c) Ozone

(d) Sand

40. Which of the following is a metalloid?

(a) Antimony

(b) Aluminum

(c) Copper

(d) Silver

41. Which was the maximum viscosity?

(a) Water

(b) Glycol

(c) Acetone

(d) Ethanol

42. 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

43. NaCl is a chemical formula of:

(a) Washing soda

(b) baking soda

(c) sugar

(d) common salt

44. 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

45. Mass of 0.40 moles of CO₂ is

(a) 40g

(b) 44g

(c) 17.6g

(d) 12.6g

46. I a.m.u. is mass of:

(a) 1 atom of C

(b) 12 atoms of C

(c) 1/12^th of C atom

(d) 6.022x10²³ atoms of C

47. Mass of 0.1 mole of CaCO3 is

(a) 1g

(b) 10g

(c) 100g

(d) 1000g

48. Neutrons are present in all toms except

(a) He

(b) C

(c) H

(d) Ne

49.The designation of an orbital with n=4 and 1=3 is

(a) 4s

(b) 2P

(c) 4d

(d) 4f

50. The lightest particle among the following is

(a) Proton

(b) Neutron

(c) Electron

(d) atom of hydrogen

51. A pie bond is formed by the overlapping of

(a) S-s orbital

(b) s-p orbital

(c) p-p

(d) d-d orbital

52. Series of lines present in visible region of Hydrogen spectrum is

(a) Lyman

(b) Balmer

(c) Paschen

(d) Brackett

53. As we move away from nucleus, the energy of the shell

(a) Decreases

(b) increases

(c) remains the same

(b) neither decreases nor

54. Which of the following noble gases has lowest atomic number

(a) Ne

(b) He

(c) Kr

(d) Xe

55. The shape of 2s orbital is

(a) Dumbbell

(b) Tetrahedral

(c) Pyramidal

(d) Spherical

56. If the mass of an atom is 90 and number of neutrons is 50 its atomic number is

(a) 40

(b) 50

(c) 90

(d) 140

57.The quantum number representing shapes of the electron cloud is

(a) n

(b) I

(c) m

(d) s

58. The size of the nucleus of an atom is of the order of

(a) 10^-8

(b)10^-13

(c) 10^-4

(d)10^-6

59. The charge on the electron was found by

(a) J.J Thomsan

(b) Miliken

(c) Faraday

(d) Goldstein

60. Every period in the periodic table ends with

(a) An alkali metal

(b)a halogen

(c) an inert gas

(d) a trasition element

61. The number of elements present in the 3^rd period is

(a) 6

(b) 18

(c)32

(d) 8

62. The element with atomic number 26 will be found in the group

(a) 4

(b) 6

(c)8

(d) 10

63. The total number of actinides in the periodic table are

(a) 12

(b) 13

(c)14

(d)15

64. The elements of group 16 in periodic table are known as

(a) Alkali metals

(b) Alkaline earths

(c) Chalcogens

(d) Halogens

65. Halogens belong to

(a) p-block

(b) s-block

(c) d-block

(d)f-block

66. In the periodic table, the position of the element still uncertain is of

(a) He

(b) H

(c) Li

(d) C

67. The purest form of water obtained from natural sources is:

(a) Spring water

(b) Rainwater

(c) Sea water

(d) Lake water

68. Temporary hardness of water is due to presence of calcium and magnesium

(a) Chlorides

(b) Sulphates

(c) Bicarbonates

(d) Nitrates

69. The process of destroying the disease producing bacteria or micro-organisms from water is known is

(a)Aeration

(b) sedimentation

(c) coagulation

(d) disinfection

70. 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

71. Permanent hardness can be removed by adding

(a) CI2

(b) Na2CO3

(c) Bleaching powder

(dKMnO4

72. The chemical name of permutit is;

(a) Potassium zeolite

(b) sodium zeolite

(c) calcium zeolite

(d) Magnesium zeolite

73. Hardness can be estimated

(a) Clark’s method

(b) soap titration method

(c) EDTA method

(d) both b and c

74. On boiling water becomes free from:

(a) Permanent hardness

(b)Temporary hardness

(c) suspended hardness

(d) floating impurities

75. Exhausted permutit is regenerated by washing it with:

(a) NaCl

(b) NaOH

(c) HCl

(d) KOH