Thursday, 13 August 2015 06:06





1. What is the Oxidation state of oxygen in hydrogen peroxide?

– -1

2. Semipermeable membrane is that which permits the passage of which molicules?

– Solvent molecules only

3. Which inorganic precipitate acts as semipermeable membrane?

– Copper ferrocyonide

4. To prepare a standard solution of a substance, what is generally used ?

– Measuring flask

5. In which mode of expression, the concentration of the solution remain independent of temperature?

– Molality

6. 8 gram NaOH is dissolved in one litre solution. What is its molarity?

– 0.2 m

7. What is the number of mole of solute per litre solution called?

– Molarity

8. What is the number of mole of solute per kilogram solvent called?

– Molality

9. What is the sum of mole fractions of the two components of a binary solution always?

– Exactly one

10. What is equal to the solution of morality in a molar solutions?

– 1

11. By whom was the law of relative lowering of vapour pressure given?

– Raoult

12. What electrolytes on passing electricity?

– Lunar caustic

13. What was the source of electrical energy on the Appolo moon flights?

– Fuel cell

14. What is moderate conductor of electricity?

– Graphite

15. Which element is with the highest electrical conductivity?

– Silver

16. During electrolysis, which the species are discharged at cathode?

– Cations

17. What is the best conductor of electricity a 0.1 M solution?

–Sulphuric acid

18. Which is the device that converts chemical energy of fuels directly into electrical energy?

– Fuel cell

19. For which cell, the standard cell voltage is zero?

– Concentration cell

20. Which metal is not attacked by the environment?

– Gold

21. To protect iron against corrosion, What is the durable metal plating on it?

– Zinc plating

22. Which apparatus is used for the measurement of quantity of electricity?

– Coulometer

23. Which colloidal solution is used in photography?

– Colloidal silver bromite

24. Which colloidal solution is commonly used as germ killer?

– Colloidal sulphur

25. Which colloidal solution is commonly used in the treatment of eye disease?

– Colloidal antimony

26. How many layers are adsorbed in chemical adsorption?

– One

27. Medicines are more effective, if they are used in which state?

– Colloidal state

28. What is the movement of colloidal particle under the influence of electric field called?

– Electrophoresis

29. When a strong beam of light is passed through a colloidal solution, what happen in light?

– Scattered

30. What is Adsorption due to strong chemical forces called?

– Chemisorption

31. In which Tyndall effect is not observed?

– Sugar solution

32. The colourfullness of the sky is due to which reason ?

– Wave length of scattered light

33. What dose not contain a hydrophobic structure?

– Rubber

34. Alums help is purifying of water through which process?

– Coagulating the mud particles

35. The enzyme ptyalin used for digestion of food is present in which enzyme?

– Saliva

36. What is the separation of colloidal particles from those of molecular dimensions called?

– Dialysis

37. Dialysis can separate which in addition to the glucose from human blood?

– Protein

38. Which colloids are solvent loving colloids?

– Lyophilic

39. Which elements are analogous to the lanthanides?

– Actinides

40. Most of the explosions in mines occur due to the mixing of which gases?

– oxygen with acetylene

41. Which common metal used for the extraction of metals from their oxides by reduction?

– Al

42. Heating of pyrites in air to remove sulphur is known as which name?

– roasting

43. The forth floation process is used for the concentration of which ores?

– Sulphide ores

44. The metallurgical process in which metal is obtained in fused state is known as which name?

– smelting

45. Which ore contains both calcium and magnesium?

– Dolomite

46. The magnetic separation is used for increasing concentration of which thing?

– haematite

47. Which oil is used in the floatation method for the purification of ores?

– Pine oil

48. Which method is used for the purification of Bauxite ore?

– Leaching

49. Gravity separation process may be used for concentration of which thing?

– Haematite

50. What is the Number of water molecules present in Mohr’s salt?

– 8

51. A process of very slow regulated cooling is known as which name?

– Annealing

52. What does Highly pure dilute solution of sodium in liquid ammonia show?

– Blue colour

53. The highest temperature is achieved in which type furnance?

– Electric

54. What is the most abundant element on the earth’s crust by weight?

– Oxygen

55. When ore is heated generally in absence of air then what is process called?

– Calcination

56. When ore is heated generally in presence of air, then what is process called?

– Roasting

57. Which compound is used for writing on glass?

– Hydrogen fluoride

58. What is produced during the formation of photochemical smog?

– Nitrogen oxide

59. Which is the halogen that does not give disproportionation reaction with alkalies?

– Fluorine

60. When CO2 is passed through an aqueous solution of bleaching powder, which gas is evolved?

– Chlorine

61. Which noble gas was discovered in chromosphere of the sun?

– Helium

62. Which charcoal forms of carbon is used in sugar industry?

– Animal charcoal

63. Anhydrous aluminium chloride is used as catalyst in which reaction?

– Friedal craft reaction

64. Phosgene is obtained by the reaction of carbon monoxide and which gas?

– Chlorine

65. Which element show electrical conductance?

– Graphite

66. What does coloured discharge tubes for advertisement mainly contain?

– Neon

67. Which halogen has the greatest electron affinity?

– Chlorine

68. Concentrated sulphuric acid is always diluted by adding which thing?

– Acid to water

69. Which element is responsible for blue baby syndrome?

– Nitrate

70. Chlorine acts as a bleaching agent only in the presence of which thing?

– Moisture

71. Which alloy is used for making magnets for hearing aids?

– Alinco

72. Water and alcohol can be separated from a mixture by which process?

– Fractional distillation

73. Which acid is used to remove ink and rust stains and cloth?

– Oxalic acid

74. Which compound does not give a positive test in Lassaigne’s test for nitrogen?

– Hydrazinc

75. Most of the explosions in mines occur due to the mixing of things?

– Oxygen with acetylene

76. The couple between base units of DNA is through which bonding?

– Hydrogen bonding

77. What is Isomerism exhibeted by acetic acid and methyl formate?

– Functional group

78. Which type of isomerism is shown by diethyl ether and methyl propyl ether?

– Metamerism

79. What does protein deficiency in the children usually between the age of 1 to 3 years cause?

– Kwashiokar

80. Which is the vitamin that is most readily manufactured in our bodies?

– Vitamin D

81. What is the no. of tertiary carbon atoms in tertiary butyl alcohol?

– 1

82. Which vitamin plays a vital role in the coagulating property of blood?

– Vitamin K

83. Which is base found in DNA but not in RNA? – Thymine

84. Which reagent may be used to distinguish between cane sugar and glucose solution?

– Fehling’s solution

85. Which of the following carbohydrates is most abundant in nature?

– Cellulose

86. Which compound gives both ninhydrin test and Molisch’s test?

– A protein

87. Deficiency of which vitamin cause knock-knee, bow legs and pigeon chest in children?

– Vitamin D

88. What may be used as food preservative?

– Sodium benzoate

89. Which metal can form a complex with insulin?

– zinc

90. What does High concentration hydrocarbon pollutants in atmospheric air cause?

– Cancer

91. The Haffkine institute, mumbai is known for its workon the production of which vaccine?

– Leprosy vaccine

92. Why does Physico-chemical characteristics of water in water sources undergo change?

– Due to effluents

93. By which is Ozone depletion in the stratosphere mainly caused?

– Chlorofluorocarbons

94. Why are Many people died in London in 1952 as result of air pollution?

– Producing smog

95. What is used as an anti-freeze for the automobile engines?

– Ethylene glycol

96. Which is Highly toxic gas causes headache, visual difficulty, paralysis and even death?

– CO

97. The water pollution in river is measured by the dissolved amount of which gas?

– oxygen

98. What does higher Higher concentration of nitrogen dioxide in atmosphere air causes?

– Bronchitis

99. What was used as a chemical weapon in the first world war?

– Mustard gas

100. Persons working in cement plants and lime stone quarries are more prone to which disease?

– Silicosis