MCQOPTIONS
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MCQOPTIONS
This section includes 108 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The type of glass used in making lenses and prisms is |
| A. | jena glass |
| B. | soft glass |
| C. | pyrex glass |
| D. | flint glass |
| Answer» E. | |
| 52. |
Which one of the following is the petroleum wax? |
| A. | Paraffin wax |
| B. | Jonoba wax |
| C. | Carnauba wax |
| D. | Bees wax |
| Answer» B. Jonoba wax | |
| 53. |
What is the wavelength of visible spectrum? |
| A. | 8500 - 9800 angstrom |
| B. | 7800 - 8000 angstrom |
| C. | 3900 - 7600 angstrom |
| D. | 1300 - 3000 angstrom |
| Answer» D. 1300 - 3000 angstrom | |
| 54. |
Who suggested that most of the mass of the atom is located in the nucleus? |
| A. | Thompson |
| B. | Bohr |
| C. | Rutherford |
| D. | Einstein |
| Answer» D. Einstein | |
| 55. |
The dark lines in the solar spectrum are due to |
| A. | absorption of corresponding wavelengths by the outer layers of the sun |
| B. | destructive interference between waves of certain definite wavelengths |
| C. | absorption of corresponding wavelengths by the prism used in the photograph |
| D. | absence of corresponding wavelengths from the light emitted by the core of the sun |
| Answer» B. destructive interference between waves of certain definite wavelengths | |
| 56. |
Which of the following shows the masses of the three elementary particles in decreasing order? |
| A. | Leptons, Baryons, Mesons |
| B. | Mesons, Baryons, Leptons |
| C. | Baryons, Mesons, Leptons |
| D. | Leptons, Mesons Baryons |
| Answer» D. Leptons, Mesons Baryons | |
| 57. |
Mesons are found in |
| A. | Laser beam |
| B. | X-rays |
| C. | Gamma rays |
| D. | Cosmic rays |
| Answer» E. | |
| 58. |
Which of the following has a least penetrating power? |
| A. | All have same penetrating power |
| B. | Beta Particles |
| C. | Alpha particles |
| D. | Gamma rays |
| Answer» D. Gamma rays | |
| 59. |
The wavelength of X-rays is of the order of |
| A. | 10 micron |
| B. | 1 angstrom |
| C. | 1 cm |
| D. | 1 m |
| Answer» C. 1 cm | |
| 60. |
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material? |
| A. | Thorium |
| B. | Radium |
| C. | Plutonium |
| D. | Radan |
| Answer» B. Radium | |
| 61. |
Epoxy resins are used as |
| A. | detergents |
| B. | insecticides |
| C. | adhesives |
| D. | moth repellents |
| Answer» D. moth repellents | |
| 62. |
Detergents used for cleaning clothes and utensils contain? |
| A. | bicarbonates |
| B. | bismuthates |
| C. | sulphonates |
| D. | nitrates |
| Answer» D. nitrates | |
| 63. |
Isotopes are separated by |
| A. | crystallisation |
| B. | sublimation |
| C. | distillation |
| D. | filtration |
| Answer» D. filtration | |
| 64. |
Which among the following is a positively charged particle emitted by a radioactive element? |
| A. | Beta ray |
| B. | Alpha ray |
| C. | Cathode ray |
| D. | Gamma ray |
| Answer» C. Cathode ray | |
| 65. |
In an atomic explosion, enormous energy is released which is due to |
| A. | conversion of chemical energy into heat energy |
| B. | conversion of mechanical energy into nuclear energy |
| C. | conversion of mass into energy |
| D. | conversion of neutrons into protons |
| Answer» D. conversion of neutrons into protons | |
| 66. |
Monazite is an ore of |
| A. | titanium |
| B. | zirconium |
| C. | iron |
| D. | thorium |
| Answer» E. | |
| 67. |
Carbon, diamond and graphite are together called |
| A. | allotropes |
| B. | isomers |
| C. | isomorphs |
| D. | isotopes |
| Answer» B. isomers | |
| 68. |
The group of metals Fe, Co, Ni may best called as |
| A. | transition metals |
| B. | main group metals |
| C. | alkali metals |
| D. | rare metals |
| Answer» B. main group metals | |
| 69. |
Heavy water is |
| A. | deuterium oxide |
| B. | PH7 |
| C. | rain water |
| D. | tritium oxide |
| Answer» B. PH7 | |
| 70. |
Non stick cooking utensils are coated with |
| A. | Teflon |
| B. | PVC |
| C. | black paint |
| D. | polystyrene |
| Answer» B. PVC | |
| 71. |
When an iron nail gets rusted, iron oxide is formed |
| A. | without any change in the weight of the nail |
| B. | with decrease in the weight of the nail |
| C. | with increase in the weight of the nail |
| D. | without any change in colour or weight of the nail |
| Answer» D. without any change in colour or weight of the nail | |
| 72. |
Among the various allotropes of carbon, |
| A. | coke is the hardest, graphite is the softest |
| B. | diamond is the hardest, coke is the softest |
| C. | diamond is the hardest, graphite is the softest |
| D. | diamond is the hardest, lamp black is the softest |
| Answer» D. diamond is the hardest, lamp black is the softest | |
| 73. |
Which of the following is used in pencils? |
| A. | Graphite |
| B. | Silicon |
| C. | Charcoal |
| D. | Phosphorous |
| Answer» B. Silicon | |
| 74. |
Chlorophyll is a naturally occurring chelate compound in which central metal is |
| A. | copper |
| B. | magnesium |
| C. | iron |
| D. | calcium |
| Answer» C. iron | |
| 75. |
Which of the following metals forms an amalgam with other metals? |
| A. | Tin |
| B. | Mercury |
| C. | Lead |
| D. | Zinc |
| Answer» C. Lead | |
| 76. |
Which of the following is not an isotope of hydrogen? |
| A. | Tritium |
| B. | Deuterium |
| C. | Protium |
| D. | Yttrium |
| Answer» E. | |
| 77. |
Permanent hardness of water can be removed by adding |
| A. | chlorine |
| B. | washing soda |
| C. | potassium permanganate |
| D. | bleaching powder |
| Answer» C. potassium permanganate | |
| 78. |
In fireworks, the green flame is produced because of |
| A. | sodium |
| B. | barium |
| C. | mercury |
| D. | potassium |
| Answer» C. mercury | |
| 79. |
Marsh gas is |
| A. | nitrogen |
| B. | ethane |
| C. | methane |
| D. | hydrogen |
| Answer» D. hydrogen | |
| 80. |
The main constituents of pearls are |
| A. | calcium oxide and ammonium chloride |
| B. | calcium carbonate and magnesium carbonate |
| C. | aragonite and conchiolin |
| D. | ammonium sulphate and sodium carbonate |
| Answer» C. aragonite and conchiolin | |
| 81. |
Actinides are the elements with atomic numbers from |
| A. | 97 to 104 |
| B. | 101 to 115 |
| C. | 89 to 103 |
| D. | 36 from 43 |
| Answer» D. 36 from 43 | |
| 82. |
The two elements that are frequently used for making transistors are |
| A. | boron and aluminium |
| B. | silicon and germanium |
| C. | iridium and tungsten |
| D. | niobium and columbium |
| Answer» C. iridium and tungsten | |
| 83. |
Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products? |
| A. | Television |
| B. | Refrigerator |
| C. | Tube light |
| D. | Cooking gas |
| Answer» C. Tube light | |
| 84. |
Which of the following is the lightest metal? |
| A. | Mercury |
| B. | Lithium |
| C. | Lead |
| D. | Silver |
| Answer» C. Lead | |
| 85. |
What is laughing gas? |
| A. | Nitrous Oxide |
| B. | Carbon monoxide |
| C. | Sulphur dioxide |
| D. | Hydrogen peroxide |
| Answer» B. Carbon monoxide | |
| 86. |
Soda water contains |
| A. | carbonic acid |
| B. | sulphuric acid |
| C. | carbon dioxide |
| D. | nitrous acid |
| Answer» D. nitrous acid | |
| 87. |
Which of the following was to be discovered first in the chromospheres of the sun? |
| A. | Krypton |
| B. | Xenon |
| C. | Neon |
| D. | Helium |
| Answer» E. | |
| 88. |
Which of the following is in liquid form at room temperature? |
| A. | Lithium |
| B. | Sodium |
| C. | Francium |
| D. | Cerium |
| Answer» D. Cerium | |
| 89. |
Which of the following are the ingredients of gun metal? |
| A. | Iron, Zinc, Titanium |
| B. | Iron, tin |
| C. | Iron, Brass, Tin |
| D. | Copper, Tin |
| Answer» E. | |
| 90. |
The filament of an electric bulb is made of |
| A. | tungsten |
| B. | nichrome |
| C. | graphite |
| D. | iron |
| Answer» B. nichrome | |
| 91. |
LPG consists of mainly |
| A. | methane, ethane and hexane |
| B. | ethane, hexane and nonane |
| C. | methane, hexane and nonane |
| D. | methane, butane and propane |
| Answer» E. | |
| 92. |
Diamond is an allotropic form of |
| A. | germanium |
| B. | carbon |
| C. | silicon |
| D. | sulphur |
| Answer» C. silicon | |
| 93. |
The most important ore of aluminium is |
| A. | galena |
| B. | calamine |
| C. | calcite |
| D. | bauxite |
| Answer» E. | |
| 94. |
Most soluble in water is |
| A. | camphor |
| B. | sulphur |
| C. | common salt |
| D. | sugar |
| Answer» E. | |
| 95. |
From which mineral is radium obtained? |
| A. | Rutile |
| B. | Haematite |
| C. | Limestone |
| D. | Pitchblende |
| Answer» E. | |
| 96. |
Bell metal is an alloy of |
| A. | nickel and copper |
| B. | zinc and copper |
| C. | brass and nickel |
| D. | tin and copper |
| Answer» E. | |
| 97. |
Which metal pollute the air of a big city? |
| A. | Copper |
| B. | Chromium |
| C. | Lead |
| D. | Cadmium |
| Answer» D. Cadmium | |
| 98. |
Air is a/an |
| A. | compound |
| B. | element |
| C. | electrolyte |
| D. | mixture |
| Answer» E. | |
| 99. |
Balloons are filled with |
| A. | nitrogen |
| B. | helium |
| C. | oxygen |
| D. | argon |
| Answer» C. oxygen | |
| 100. |
Which of the following does not contain a coinage metal? |
| A. | Silver and Gold |
| B. | Zinc and Gold |
| C. | Copper and Silver |
| D. | Copper and Gold |
| Answer» C. Copper and Silver | |