MCQOPTIONS
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MCQOPTIONS
This section includes 1262 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The radioactive isotope of hydrogen is called___________? |
| A. | tritium |
| B. | deuterium |
| C. | protium |
| D. | ortho-hydrogen |
| Answer» B. deuterium | |
| 52. |
Electron was discovered by? |
| A. | Michael Faraday |
| B. | James Maxwell |
| C. | Yuri Gagarin |
| D. | J.J Thomson |
| Answer» E. | |
| 53. |
Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________? |
| A. | ionic substances |
| B. | metallic substances |
| C. | molecular solids |
| D. | covalent network solids |
| Answer» C. molecular solids | |
| 54. |
All of the following substances are crystalline except_____________? |
| A. | Ice |
| B. | Diamond |
| C. | Sucrose |
| D. | Plastic |
| Answer» E. | |
| 55. |
Sodium carbonate is produced by____________? |
| A. | haber process |
| B. | Amonia solvay process |
| C. | decons process |
| D. | lead chamber process |
| Answer» C. decons process | |
| 56. |
Covalent network crystals have_____________? |
| A. | higher melting point then molecular crystals |
| B. | lower melting point then molecular crystals |
| C. | discrete molecules linked by Van der waals forces |
| D. | hydrogen bonding |
| Answer» B. lower melting point then molecular crystals | |
| 57. |
The use of antifreeze in the automobile radiator is an important application of__________________? |
| A. | constitutive property |
| B. | additive property |
| C. | colligative property |
| D. | intrinsic property |
| Answer» D. intrinsic property | |
| 58. |
Increase in atomic number is observed during_________________? |
| A. | Alpha emission |
| B. | Beta emission |
| C. | Both A & B |
| D. | Radioactivity |
| Answer» C. Both A & B | |
| 59. |
Which of the following statements is wrong about isotopes ? |
| A. | they possess different mass number |
| B. | they possess different physical properties |
| C. | they possess same chemical properties |
| D. | they possess different position in the periodic table |
| Answer» E. | |
| 60. |
Combustion analysis is performed to determine__________________? |
| A. | Empirical formula |
| B. | Molecular mass |
| C. | Molecular formula |
| D. | Formula mass |
| Answer» B. Molecular mass | |
| 61. |
Which of the following methods is used to estimate hydrogen in an organic compound ? |
| A. | Combustion method |
| B. | Dumas method |
| C. | Kjeldahls method |
| D. | All of the above methods are for different purposes |
| Answer» B. Dumas method | |
| 62. |
Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse ? |
| A. | 20cm3/min |
| B. | 40cm3/min |
| C. | 160cm3/min |
| D. | 2.5cm3/min |
| Answer» C. 160cm3/min | |
| 63. |
Isotopes differ in_________________? |
| A. | properties which depend upon mass |
| B. | arrangement of electrons in orbitals |
| C. | chemical properties |
| D. | all of the above |
| Answer» B. arrangement of electrons in orbitals | |
| 64. |
Methyl alcohol is not used as___________________? |
| A. | a solvent |
| B. | an anti freezing agent |
| C. | a substitute for petrol |
| D. | for denaturing of ethyl alcohol |
| Answer» D. for denaturing of ethyl alcohol | |
| 65. |
As a substance moves from a solid to a liquid all of the following changes occur except ? |
| A. | molecules become more disordered. |
| B. | K.E of the molecules decreases |
| C. | intermolecular forces become weaker |
| D. | molecules move more frequently |
| Answer» C. intermolecular forces become weaker | |
| 66. |
When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained ? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 67. |
Which of the following solids show anisotropy___________________? |
| A. | Plastic |
| B. | Glass |
| C. | Rubber |
| D. | None of the above |
| Answer» E. | |
| 68. |
1 mole of electron has mass in microgram_________________? |
| A. | 1.008 x 10-3 |
| B. | 5.5 x 10-4 |
| C. | 1.84 x 10-4 |
| D. | 1.673 x 10-3 |
| Answer» C. 1.84 x 10-4 | |
| 69. |
Which statement is consistent with Hunds rule ? |
| A. | Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel |
| B. | The electrons in the same atom cannot have the same four quantum numbers |
| C. | There is maximum of two electrons is an orbital. |
| D. | None |
| Answer» B. The electrons in the same atom cannot have the same four quantum numbers | |
| 70. |
Which of the following is mineral fiber ? |
| A. | Teflon |
| B. | asbestos |
| C. | saran |
| D. | acrylic |
| Answer» C. saran | |
| 71. |
Quantum number values for 3p orbitals are____________________? |
| A. | n=3 l=2 |
| B. | n=3 l=0 |
| C. | n=3 l=1 |
| D. | n=3 l=3 |
| Answer» D. n=3 l=3 | |
| 72. |
Which of following metals can be displaced by all other metals from its solution ? |
| A. | Ag |
| B. | A |
| C. | Au |
| D. | Cu |
| Answer» D. Cu | |
| 73. |
In which of the following type of reactions energy of reactant is greater than energy of product________________? |
| A. | endothermic |
| B. | exothermic |
| C. | unpredictable |
| D. | same |
| Answer» C. unpredictable | |
| 74. |
At which electrode the reduction of the solution is occurring in Al-Ag cell_____________? |
| A. | A |
| B. | Ag |
| C. | Both |
| D. | Neither |
| Answer» C. Both | |
| 75. |
Which of the following molecule is polar__________________? |
| A. | CCI4 |
| B. | CO2 |
| C. | BF3 |
| D. | none of the above |
| Answer» E. | |
| 76. |
Which of the following elements has greater 1st ionization energy__________________? |
| A. | B |
| B. | C |
| C. | N |
| D. | O |
| Answer» D. O | |
| 77. |
Which of the elements do not fall in stair case of the modern periodic table__________________? |
| A. | Si |
| B. | As |
| C. | Te |
| D. | None of the above |
| Answer» E. | |
| 78. |
Which of the following is the formula of chrome red ? |
| A. | Pb3 O4 |
| B. | 2Pb CO3 – Pb (OH)2 |
| C. | Pb Cr O4 – Pb (OH)2 |
| D. | Pb2O |
| Answer» B. 2Pb CO3 – Pb (OH)2 | |
| 79. |
Which catalyst is used in contact process ? |
| A. | Fe2O3 |
| B. | V2O5 |
| C. | SO3 |
| D. | Ag2O |
| Answer» C. SO3 | |
| 80. |
Across short period the melting and boiling point increase upto __________________? |
| A. | IIIA group |
| B. | IVA group |
| C. | VA group |
| D. | VIA group |
| Answer» C. VA group | |
| 81. |
The inhaled breath of diabetics patient contain acetone. A medical student wishes to test for diabetes by asking patient to bubble their breath through a reagent ? |
| A. | alkaline aquenous iodine |
| B. | aqueous bromine |
| C. | Fehling solution |
| D. | aqueous NaOH |
| Answer» B. aqueous bromine | |
| 82. |
Which of the following points are important in connection with equilibrium constant ? |
| A. | Kc is constant at given temperature |
| B. | Kc is unaffected by change in concentration of reactants or products |
| C. | Kc indicates the extent of reaction but not about the rate of reaction. |
| D. | All of the above |
| Answer» E. | |
| 83. |
What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ? |
| A. | 6 |
| B. | 4 |
| C. | 3 |
| D. | 2 |
| Answer» E. | |
| 84. |
Solubility of CaF2 is 2.0×10-4 gdm-3 then Ksp of CaF2 is_______________? |
| A. | 4.0 x 10-8 |
| B. | 3.2 x 10-11 |
| C. | 2.0 x 10-8 |
| D. | 4.0 x 10-12 |
| Answer» C. 2.0 x 10-8 | |
| 85. |
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________? |
| A. | Ethylene iodide |
| B. | Ethylene bromide |
| C. | Ethylene chloride |
| D. | Ethylene fluoride |
| Answer» C. Ethylene chloride | |
| 86. |
The unit of the rate constant (k) is same as that of rate of reaction________________? |
| A. | First order reaction |
| B. | Second order reaction |
| C. | Zero order reaction |
| D. | Third order reaction |
| Answer» D. Third order reaction | |
| 87. |
The unit of molality is__________________? |
| A. | moles dm-3 |
| B. | moles kg-1 |
| C. | gram dm-3 |
| D. | none |
| Answer» C. gram dm-3 | |
| 88. |
A solution can be both____________________? |
| A. | dilute and concentrated |
| B. | dilute and saturated |
| C. | saturated and unsaturated |
| D. | saturated and super saturated |
| Answer» B. dilute and saturated | |
| 89. |
Which of the following elements conduct electricity and also melts below 100°C ? |
| A. | Aluminium |
| B. | Sodium |
| C. | Carbon |
| D. | Sulphur |
| Answer» C. Carbon | |
| 90. |
Acid present in acid rain may be_________________? |
| A. | H2SO4 |
| B. | HNO3 |
| C. | both A and B |
| D. | none of the above |
| Answer» D. none of the above | |
| 91. |
Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________? |
| A. | one / seventeen |
| B. | sixteen / seventeen |
| C. | one / three |
| D. | two / three |
| Answer» D. two / three | |
| 92. |
The molecules of CO2 in dry ice form__________________? |
| A. | Ionic crystal |
| B. | Covalent crystal |
| C. | Molecular crystal |
| D. | Any type of crystal |
| Answer» D. Any type of crystal | |
| 93. |
Only London dispersion forces are present among the_________________? |
| A. | Molecules of water in liquid state |
| B. | Atoms of helium in gaseous state at high temperature |
| C. | Molecules of hydrogen chloride gas |
| D. | Molecules of solid iodine |
| Answer» E. | |
| 94. |
Which specie has unpaired electrons in antibonding molecular orbitals_______________? |
| A. | O2+2 |
| B. | N2-2 |
| C. | B2 |
| D. | O2-2 |
| Answer» C. B2 | |
| 95. |
Chemical properties of first member of homologous series with respect to other members are_________________? |
| A. | same |
| B. | different |
| C. | depends upon number of C atoms |
| D. | depends upon number of H atoms |
| Answer» B. different | |
| 96. |
Which is carnalite________________? |
| A. | KCI |
| B. | NaCI |
| C. | KCI MgCl2 6H2O |
| D. | Na2CO3. 10H2O |
| Answer» D. Na2CO3. 10H2O | |
| 97. |
Benzene is a good solvent for__________________? |
| A. | fats |
| B. | resins |
| C. | iodine |
| D. | all the above |
| Answer» E. | |
| 98. |
A real gas obeying vander waals equation will resemble the ideal gas if_______________________? |
| A. | Both a and b are small |
| B. | Both a and b are large |
| C. | a is small and b is large |
| D. | a is large and b is small |
| Answer» B. Both a and b are large | |
| 99. |
Which molecule has the highest bond energy among the halogens_________________? |
| A. | Fluorine |
| B. | Chlorine |
| C. | Iodine |
| D. | Bromine |
| Answer» C. Iodine | |
| 100. |
Which one does not give borax bead test_________________? |
| A. | Copper sulphate |
| B. | Barium sulphate |
| C. | Cobalt sulphate |
| D. | Nickel sulphate |
| Answer» C. Cobalt sulphate | |