Tuesday 7 May 2019
Sunday 5 May 2019
Chemistry MCQs /E book Library part 7
61. The blister form of copper is ____________ form.
(A) Impure
(B) Raw
(C) Pure
(D) Refined
(A) Impure
(B) Raw
(C) Pure
(D) Refined
62. Vitamin A is soluble in ?
(A) Water
(B) Fats
(C) Both A&B
(D) None of these
(A) Water
(B) Fats
(C) Both A&B
(D) None of these
63. Vitamin B is soluble in ?
(A) Fats
(B) Water
(C) Both A&B
(D) None of these
(A) Fats
(B) Water
(C) Both A&B
(D) None of these
64. There are __________ types of DNA.
(A) 1
(B) 2
(C) 3
(D) 4
(A) 1
(B) 2
(C) 3
(D) 4
65. Nucleic acid was first discovered in ?
(A) 1869
(B) 1870
(C) 1871
(D) 1872
(A) 1869
(B) 1870
(C) 1871
(D) 1872
66. Mutation is a sudden chemical change in ?
(A) DNA
(B) RNA
(C) Cell
(D) Cell wall
(A) DNA
(B) RNA
(C) Cell
(D) Cell wall
67. Amino acids are the building blocks of ?
(A) Lipids
(B) Fats
(C) Vitamins
(D) Protein
(A) Lipids
(B) Fats
(C) Vitamins
(D) Protein
68. Organic chemistry is the study of ?
(A) Carbon
(B) Metal
(C) Oxygen
(D) Carbon and its compounds
(A) Carbon
(B) Metal
(C) Oxygen
(D) Carbon and its compounds
69. Enzymes are made of ?
(A) Protein
(B) Lipids
(C) Fats
(D) Minerals
(A) Protein
(B) Lipids
(C) Fats
(D) Minerals
70. Cause of acidic rain is ?
(A) Nitrogen
(B) Sulphure Dioxide
(C) Carbonic Acid
(D) Carboxide
(A) Nitrogen
(B) Sulphure Dioxide
(C) Carbonic Acid
(D) Carboxide
Chemistry MCQs /E book Library part 6
51. Most of the aquatic animals cannot survive above ?
(A) 30 °C
(B) 35 °C
(C) 50 °C
(D) 44 °C
(A) 30 °C
(B) 35 °C
(C) 50 °C
(D) 44 °C
52. Which one of the following disease is caused by mercury ?
(A) Typhoid
(B) Cholera
(C) Hepatitis
(D) Parkinson
(A) Typhoid
(B) Cholera
(C) Hepatitis
(D) Parkinson
53. The blister copper is refined by ?
(A) Boiling
(B) Concentration
(C) Electrolysis
(D) Reduction
(A) Boiling
(B) Concentration
(C) Electrolysis
(D) Reduction
54. Chemical formula of Urea is ?
(A) NH2CONH2
(B) Na2CO3
(C) NH2COONH4
(D) NH4CL
(A) NH2CONH2
(B) Na2CO3
(C) NH2COONH4
(D) NH4CL
55. Sodium carbonate is commercially manufactured by ?
(A) Ostwald’s Process
(B) Haber’s Process
(C) Frisch Process
(D) Solvay Process
(A) Ostwald’s Process
(B) Haber’s Process
(C) Frisch Process
(D) Solvay Process
56. Urea is probably, most important fertilizer ?
(A) Nitrogenous
(B) Sulphur
(C) Organic
(D) Phosphate
(A) Nitrogenous
(B) Sulphur
(C) Organic
(D) Phosphate
57. Petroleum is a mixture of many ?
(A) Salt
(B) Hydrocarbons
(C) Hydroxide
(D) Acids
(A) Salt
(B) Hydrocarbons
(C) Hydroxide
(D) Acids
58. Raw materials used for manufacturing urea are ?
(A) H2 & NH3
(B) CO2 & NH3
(C) HCL & NH3
(D) None of these
(A) H2 & NH3
(B) CO2 & NH3
(C) HCL & NH3
(D) None of these
59. Which one is a step of metallurgical process ?
(A) Rustin
(B) Roasting
(C) Crystallization
(D) None of these
(A) Rustin
(B) Roasting
(C) Crystallization
(D) None of these
60. Different fractions of petroleum are separated by ?
(A) Cooling
(B) Fractional Distillation
(C) Steam distillation
(D) None of these
(A) Cooling
(B) Fractional Distillation
(C) Steam distillation
(D) None of these
Chemistry MCQs /E book Library part 5
41. The reason of unusual physical properties of water is due to the presence of ?
(A) Covalent bond
(B) Coordinate cov. Bond
(C) Hydrogen bonding
(D) None of these
(A) Covalent bond
(B) Coordinate cov. Bond
(C) Hydrogen bonding
(D) None of these
42. The density of water is one gram per centimeter cube at ?
(A) 60 °C
(B) 4 °C
(C) 100 °C
(D) 0 °C
(A) 60 °C
(B) 4 °C
(C) 100 °C
(D) 0 °C
43. The enormous quantity of water present on earth surface acts as giant thermostat due to its high ?
(A) Density
(B) Boiling Point
(C) Latent heat values
(D) Heat Capacity
(A) Density
(B) Boiling Point
(C) Latent heat values
(D) Heat Capacity
44. The latent heat of fusion of water is ?
(A) 4.2 KJ/Mol
(B) 5.2 KJ/Mol
(C) 6 KJ/Mol
(D) 5.7 KJ/Mol
(A) 4.2 KJ/Mol
(B) 5.2 KJ/Mol
(C) 6 KJ/Mol
(D) 5.7 KJ/Mol
45. Dielectric constant of water at 18 °C is ?
(A) 70
(B) 80
(C) 84
(D) 75
(A) 70
(B) 80
(C) 84
(D) 75
46. Water gas is a mixture of ?
(A) Hydrogen & Oxygen
(B) Steam & Air
(C) CO & H2
(D) None of these
(A) Hydrogen & Oxygen
(B) Steam & Air
(C) CO & H2
(D) None of these
47. Chlorine act as a bleaching agent in the presence of ?
(A) HNO3
(B) NaOH
(C) HCL
(D) H2O
(A) HNO3
(B) NaOH
(C) HCL
(D) H2O
48. The chemical formula of magnetic oxide is ?
(A) Fe3O4
(B) Fe2O3.H2O
(C) Fe2O3
(D) FeO
(A) Fe3O4
(B) Fe2O3.H2O
(C) Fe2O3
(D) FeO
49. Rain water is acidic in nature because air contain ?
(A) Carbon dioxide
(B) Nitrogen
(C) Oxygen
(D) All of these
(A) Carbon dioxide
(B) Nitrogen
(C) Oxygen
(D) All of these
50. Nutrient pollution of water bodies is caused by ?
(A) Nitrates & Phosphates
(B) Pathogens
(C) Acid rain
(D) Cal & Mag
(A) Nitrates & Phosphates
(B) Pathogens
(C) Acid rain
(D) Cal & Mag
