MCQOPTIONS
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MCQOPTIONS
This section includes 80 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
I2 is the example of? |
| A. | Atomic crystal |
| B. | Ionic crystal |
| C. | Covalent crystal |
| D. | Molecular crystal |
| Answer» E. | |
| 52. |
When α = β = 90° and γ = 120° then the system is said to be? |
| A. | Hexagonal |
| B. | Monodinic |
| C. | Trigonal |
| D. | Orthorhombic |
| Answer» B. Monodinic | |
| 53. |
When α ? β ? γ ? 90° then the system is said to be? |
| A. | Triclinic |
| B. | Hexagonal |
| C. | Trigonal |
| D. | Monodlinic |
| Answer» B. Hexagonal | |
| 54. |
To cook the food at a high mountain is difficult as compared to sea level because? |
| A. | The hydrogen bonding in water changes with the change of height. |
| B. | The density of water decreases at the mountains. |
| C. | The temperature at the top of the mountain is low. |
| D. | The boiling point of water decreases at the mountains. |
| Answer» E. | |
| 55. |
The conversion of solid state directly into a gaseous state without passing through liquid state is called? |
| A. | Evaporation |
| B. | Freezing |
| C. | Sublimation |
| D. | Boiling |
| Answer» D. Boiling | |
| 56. |
Ionic solids are characterized by? |
| A. | Low melting points. |
| B. | High vapour pressure. |
| C. | Good conductivity in solid state. |
| D. | Solubility in polar solvents. |
| Answer» E. | |
| 57. |
Diamond is the example of? |
| A. | Ionic crystal |
| B. | Covalent Crystal |
| C. | Atomic crystal |
| D. | Molecular crystal |
| Answer» C. Atomic crystal | |
| 58. |
Which of the following pair form cubic crystals? |
| A. | ZnSO4 and NiSO4 |
| B. | NaF and MgO |
| C. | CaCO3 and NaNO3 |
| D. | ZnSO4 and NaNO3 |
| Answer» C. CaCO3 and NaNO3 | |
| 59. |
oiling point increases with the presence of? |
| A. | Covalent bond |
| B. | lone pair |
| C. | Double covalent bond |
| D. | H—bonding |
| Answer» E. | |
| 60. |
Glycerin is a polar compound. It boils at 290°C under l atm. It should be distilled under reduced pressure due to the reason that? |
| A. | It decomposes at 290°C. |
| B. | low pressure makes the liquid to boil at high temperature. |
| C. | There are strong intermolecular forces between molecules of glycerin. |
| D. | The reduced pressure decreases the boiling point of liquids. |
| Answer» E. | |
| 61. |
The state of matter in which the tendency of compressibility is almost zero is? |
| A. | Liquid state |
| B. | Solid state |
| C. | Gaseous state |
| D. | In all the states |
| Answer» C. Gaseous state | |
| 62. |
Effusion is the escape of gas through? |
| A. | Porous container |
| B. | A small pin hole |
| C. | Permeable membrane |
| D. | Semi permeable membrane |
| Answer» B. A small pin hole | |
| 63. |
Lighter gas diffuses ___ than heavier gases |
| A. | More readily |
| B. | Less readily |
| C. | Very slowly |
| D. | None of above |
| Answer» B. Less readily | |
| 64. |
The Boiling point of pure' water as? |
| A. | 100°F |
| B. | 373 K |
| C. | 32°C |
| D. | 273 K |
| Answer» C. 32°C | |
| 65. |
The two substances having same.crystals are said to be? |
| A. | Isomers |
| B. | Polymorphous |
| C. | Isotopes |
| D. | Isomorphous |
| Answer» E. | |
| 66. |
Boyle's Law relates? |
| A. | Pressure & Temperature |
| B. | Temperature & volume |
| C. | Pressure & volume |
| D. | Volume & number of molecules |
| Answer» D. Volume & number of molecules | |
| 67. |
When all the angles of system is equal to 90°, i.e. α = β = γ = 90° but the sides are not equal the system is said to be? |
| A. | Orthorhombic |
| B. | Cubic |
| C. | Tetragonal |
| D. | Trigonal |
| Answer» D. Trigonal | |
| 68. |
The existence of different crystalline forms of the same substance is called? |
| A. | Isotopes |
| B. | Isomerism |
| C. | Polymorphism |
| D. | Isomorphism |
| Answer» D. Isomorphism | |
| 69. |
The property of crystals in which the physical properties are different in different direction is called? |
| A. | Cleavage |
| B. | Isomerism |
| C. | Anisotropy |
| D. | Isotropy |
| Answer» D. Isotropy | |
| 70. |
The internal resistance of a liquid to flow is called? |
| A. | Viscosity |
| B. | Vapour pressure |
| C. | Surface tension |
| D. | Capillary action |
| Answer» B. Vapour pressure | |
| 71. |
700 tort is equal to? |
| A. | 760 atm |
| B. | 700 atm |
| C. | 1 atm |
| D. | 0.92 atm |
| Answer» E. | |
| 72. |
At constant temperature, if the pressure is doubled, the volume of the gas will be? |
| A. | Reduced by half |
| B. | Doubled |
| C. | Not changed |
| D. | Increased four times |
| Answer» B. Doubled | |
| 73. |
A graph between pressure and inverse of volume and constant temperature and number of moles? |
| A. | Straight line parallel to x-axis |
| B. | Straight line passing through the origin |
| C. | Straight line parallel to v-axis |
| D. | The curve showing the maximum. |
| Answer» C. Straight line parallel to v-axis | |
| 74. |
Gas equation is the combination of? |
| A. | Avogadro's Law, Charle's Law & Boyle's law. |
| B. | Charle's Law and Boyle's Law |
| C. | Avogadro's Law and Charle's Law |
| D. | Boyle's Law and Avogadro's Law |
| Answer» B. Charle's Law and Boyle's Law | |
| 75. |
If the temperature and pessure of 2dm3 ofCO2 are doubled, then volume ofCO2 would become? |
| A. | 5dm3 |
| B. | 4dm3 |
| C. | 2dm3 |
| D. | 8dm3 |
| Answer» D. 8dm3 | |
| 76. |
A gas occupies a volume of 4dm3 at 25°C and l atm, pressure. What volume it occupies at S.T.P? |
| A. | 325.4 |
| B. | 36 |
| C. | 40.4 |
| D. | 66 |
| Answer» E. | |
| 77. |
The ideal gas constant R, when expressed in dm3 — atm unit, be a value of? |
| A. | 821 |
| B. | 81 |
| C. | 821 |
| D. | 0.0821 |
| Answer» E. | |
| 78. |
At 50°C a gas has l atm pressure, and 20dm3 volume, its volume at S.T.P would be |
| A. | 16.94dm3 |
| B. | 10.92dm3 |
| C. | 42 dm3 |
| D. | 66dm3 |
| Answer» B. 10.92dm3 | |
| 79. |
If both temperature and volume of a gas doubled,. the pressure? |
| A. | increases four times |
| B. | Remain unchanged |
| C. | Is reduced to half |
| D. | Also doubled |
| Answer» C. Is reduced to half | |
| 80. |
The energy of gas molecules increases |
| A. | The number of moles of gas increase |
| B. | Pressure of a gas increases |
| C. | The rate of collision increases |
| D. | The energy of gas molecules increases |
| Answer» B. Pressure of a gas increases | |