MCQOPTIONS
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MCQOPTIONS
This section includes 259 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
H2S2O8 is called |
| A. | Persulphuric acid |
| B. | Pyrosulphurus acid |
| C. | Pyrosulphuric acid |
| D. | Dithionic acid |
| Answer» B. Pyrosulphurus acid | |
| 52. |
Sulphur molecule is |
| A. | S |
| B. | S |
| C. | S |
| D. | S |
| Answer» E. | |
| 53. |
Which of the fuel gases has composition by volume 34% CH4 + 48% H2 + 15% O2 + 3% CO |
| A. | Oil gas |
| B. | Petrol gas |
| C. | Coal gas |
| D. | Water gas |
| Answer» D. Water gas | |
| 54. |
Leas dioxide is formed by |
| A. | PbO + KCIO |
| B. | PbO |
| C. | + NaOH |
| D. | PbO + O |
| E. | Pb + O |
| Answer» B. PbO | |
| 55. |
The acid employed for etching of glass is |
| A. | H |
| B. | SO |
| C. | HCIO |
| D. | HF |
| E. | Aqua-regia |
| Answer» D. HF | |
| 56. |
Which of the following oxide is neutral ? |
| A. | CO |
| B. | SiO |
| C. | ZnO |
| D. | P |
| E. | O |
| Answer» B. SiO | |
| 57. |
The reducing agent in thermite process is |
| A. | Mg |
| B. | BaO |
| C. | Al |
| D. | MnO |
| Answer» D. MnO | |
| 58. |
Which of the following is an acid ? |
| A. | B(OH) |
| B. | AI(OH) |
| C. | TI(OH) |
| D. | In(OH) |
| Answer» B. AI(OH) | |
| 59. |
Mo is used as catalyst in the manufacture of |
| A. | HCI |
| B. | NH |
| C. | HNO |
| D. | HNO |
| Answer» C. HNO | |
| 60. |
SO2 + CI 2sunlight Product. The product is |
| A. | Chloroform |
| B. | Sulphuryl chloride |
| C. | Sulphuric acid |
| D. | None of these |
| Answer» C. Sulphuric acid | |
| 61. |
The molarity of pure water at 4 C is |
| A. | 2.5 M |
| B. | 5 M |
| C. | 1 M |
| D. | 55.5 M |
| Answer» E. | |
| 62. |
The oxyacid of halogen has maximum acidic nature |
| A. | HCIO |
| B. | HCIO |
| C. | HCIO |
| D. | HCIO |
| Answer» E. | |
| 63. |
Assertion (A) : To dilute sulphuric acid, acid is added to water and not water to acidReason (R) : Specific heat of water is quite large Codes |
| A. | Both A and R are true and R is the correct explanation A |
| B. | Both A and R are true but R is the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» B. Both A and R are true but R is the correct explanation of A | |
| 64. |
Stannous fluoride is formede by |
| A. | Sn + HF |
| B. | SnO |
| C. | + HF |
| D. | Sn + F |
| E. | SnO + HF |
| Answer» E. SnO + HF | |
| 65. |
Consider the following statements. Hard water is not suitable for1. Drinking2. Washing clothes with soap3. Use in boilers4. Irrigating cropsWhich of these statements are correct ? |
| A. | 1 and 3 |
| B. | 2 and 3 |
| C. | 1, 2 and 4 |
| D. | 1, 2, 3 and 4 |
| Answer» C. 1, 2 and 4 | |
| 66. |
In the reaction N2 + 3H2 - 2NH3 the catalyst used as |
| A. | Pt and Cu |
| B. | Fe and Mo |
| C. | NO an Pt |
| D. | Ni and Ti |
| Answer» C. NO an Pt | |
| 67. |
Which one of the following is solid at room temperature ? |
| A. | CI |
| B. | F |
| C. | I |
| D. | Br |
| Answer» D. Br | |
| 68. |
Biogas and producer gas are made of |
| A. | Producer gas contains CO but not CO |
| B. | Biogas contains CO |
| C. | but producer gas does not |
| D. | Both biogas and producer gas have N |
| E. | All of them |
| Answer» E. All of them | |
| 69. |
The formula of white phosphorus is |
| A. | P |
| B. | P |
| C. | P |
| D. | P |
| Answer» B. P | |
| 70. |
H3PO3 is |
| A. | A tribasic |
| B. | A dibasic |
| C. | A monobasic |
| D. | Neutral |
| Answer» C. A monobasic | |
| 71. |
Nitrogen combines with metal to form |
| A. | Nitride |
| B. | Nitrite |
| C. | Nitrate |
| D. | Nitrosyl chloride |
| Answer» B. Nitrite | |
| 72. |
Animals die in nitrogen atmosphere because |
| A. | it is poisonous |
| B. | it is heavier than air |
| C. | they want oxygen |
| D. | it destroys haemoglobin |
| Answer» D. it destroys haemoglobin | |
| 73. |
Oxygen was discovered by |
| A. | Priestley |
| B. | Boyle |
| C. | Scheele |
| D. | Cavendish |
| Answer» B. Boyle | |
| 74. |
The most reactive among the halogen is |
| A. | Fluorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» B. Chlorine | |
| 75. |
Which gas is used in filling electric bulbs ? |
| A. | Neon |
| B. | Argon |
| C. | Radon |
| D. | Krypton |
| Answer» C. Radon | |
| 76. |
Which noble gas was discovered in chromosphere of the sun ? |
| A. | Helium |
| B. | Neon |
| C. | Xenon |
| D. | Radon |
| Answer» B. Neon | |
| 77. |
Which of the following noble gases is least polarisable ? |
| A. | He |
| B. | Ar |
| C. | Nr |
| D. | Xe |
| Answer» B. Ar | |
| 78. |
Ozone molecule is |
| A. | Linear |
| B. | Paramagnetic |
| C. | Diamagnetic |
| D. | Tetrahedral |
| Answer» D. Tetrahedral | |
| 79. |
Alum is water purifier because it |
| A. | Gives taste |
| B. | Softens hard water |
| C. | Coagulates the impurities |
| D. | Destroys the pathogenic bacteria |
| Answer» E. | |
| 80. |
The element which shows least metallic character is |
| A. | Indium |
| B. | Aluminium |
| C. | Boron |
| D. | Gallium |
| Answer» D. Gallium | |
| 81. |
The characteristics odour of garlic is due to |
| A. | A chloro compound |
| B. | A sulphur compound |
| C. | A fluorine compound |
| D. | Acetic acid |
| Answer» C. A fluorine compound | |
| 82. |
Which is the best fertilizer ? |
| A. | Phosphatic slag |
| B. | Triple phosphate |
| C. | Super phosphate |
| D. | None of these |
| Answer» C. Super phosphate | |
| 83. |
Which of the following is not chalcogen ? |
| A. | O |
| B. | Na |
| C. | S |
| D. | Se |
| Answer» C. S | |
| 84. |
When CO |
| A. | Chlorine |
| B. | Oxygen |
| C. | Ozone |
| D. | Chlorine dioxide |
| Answer» B. Oxygen | |
| 85. |
The mixture of white and red phosphorus can be separated by using - |
| A. | Kerosene |
| B. | Iodine |
| C. | NaOH |
| D. | HNO |
| E. | <sub>3</sub> |
| Answer» D. HNO | |
| 86. |
Which one of the following is associated with the formation of brown air in traffic congested cities |
| A. | Sulphur dioxide |
| B. | Nitrogen oxide |
| C. | Carbon dioxide |
| D. | Carbon monoxide |
| Answer» B. Nitrogen oxide | |
| 87. |
Which one of the following is produced during the formation of photochemical smog ? |
| A. | Hydrocarbons |
| B. | Nitrogen oxide |
| C. | Ozone |
| D. | Methane |
| Answer» C. Ozone | |
| 88. |
The number of unpaired electrons is O |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | None of these |
| Answer» C. 2 | |
| 89. |
Which one of the following is used for writing on glass ? |
| A. | Silicon |
| B. | Graphite |
| C. | Hydrogen fluoride |
| D. | Hydrogen iodide |
| Answer» D. Hydrogen iodide | |
| 90. |
Which of the following is not a source of sulphur ? |
| A. | Carnalite |
| B. | Galena |
| C. | Gypsum |
| D. | Cinnabar |
| Answer» B. Galena | |
| 91. |
Which one of the following is not an essential micronutrient for plants ? |
| A. | Boron |
| B. | Zinc |
| C. | Sodium |
| D. | Copper |
| Answer» D. Copper | |
| 92. |
The gas obtained by radioactive disintegration of radium (226) is |
| A. | Argon |
| B. | Neon |
| C. | Radon |
| D. | Krypton |
| Answer» D. Krypton | |
| 93. |
The mixture of noble gases is separated by |
| A. | Ramsay-Rayleigh's first method |
| B. | Ramsay-Rayleigh's second method |
| C. | Fisher and Ringe's method |
| D. | Dewar's coconut charcoal adsorption method |
| Answer» E. | |
| 94. |
Radon is a |
| A. | Drug |
| B. | Noble gas |
| C. | Trade name of nylon |
| D. | Explosive |
| Answer» C. Trade name of nylon | |
| 95. |
Mark the halogen that does not give disproportionation reaction with alkalies |
| A. | Iodine |
| B. | Chlorine |
| C. | Fluorine |
| D. | Bromine |
| Answer» D. Bromine | |
| 96. |
Which one is a good conductor of electricity ? |
| A. | Red phosphorus |
| B. | Black phosphorus |
| C. | Violet phosphorus |
| D. | Scarlet phosphorus |
| Answer» C. Violet phosphorus | |
| 97. |
The gas is commonly used in anaesthesia |
| A. | Methane |
| B. | Nitrous oxide |
| C. | Nitrogen |
| D. | Hydrogen peroxide |
| Answer» C. Nitrogen | |
| 98. |
The credit of discovery of hydrogen peroxide goes to |
| A. | Cavandish |
| B. | Bernard |
| C. | Cay-Lussac |
| D. | Thenard |
| Answer» C. Cay-Lussac | |
| 99. |
Decomposition od H |
| A. | MnO |
| B. | Acetanilide |
| C. | Traces of acid |
| D. | All of them |
| Answer» B. Acetanilide | |
| 100. |
Heavy water is used as |
| A. | Washing water |
| B. | Detergent |
| C. | Drinking water |
| D. | Moderator |
| Answer» E. | |