Chemistry MCQs Class 11

• Here are the detailed chemistry mcqs test for class 11 to help you prepare for your exams.
• Important Multiple Choice Questions (MCQs) of every chapter of Chemistry Class 11.
• Formula mass of MgSO4 is g/mole:  (a) 150 (b) 120 (c) 130 (d) 140
• Height of peak in mass spectrum shows: (a) Number of isotopes (b) Mass number (c) Relative abundance (d) Number of protons
• Tin has isotopes:  (a) 7 (b) 9 (c) 11 (d) 5
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• The mass of CO2 containing 8 grams of oxygen (O2) in grams is: (a) 32 (b) 22 (c) 16 (d) 11
• Isotopes are sister atoms of same element with similar chemical properties but different: (a) Atomic number (b) Atomic volume (RWP 09) (c) Atomic weight (d) Atomic structure
• The atomicity of NH3 is: (a) One (b) Two (c) Three (d) Four
• Atoms of which one of the following element have independent existence: (a) Flourine (b) krypton (c) Oxygen (d) Nitrogen 
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• Dempster’s mass spectrometer was designed for the identification of isotopes of the elements which were available in:(a) Gaseous state (b) Liquid state (c) Solid state (d) Plasma state
• Silver has isotopes: (LHR 10) (a) 9 (b) 16 (c) 17 (d) 18
• How many isotopes are present in palladium? (a) Four (b) Five (c) Six (d) Seven
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• Which of the following element can exist in monoatomic form: (a) Oxygen (b) Chlorine (c) Nitrogen (d) Helium 
• In paper chromatography, the point to which the solvent rises to maximum extent is called: (a) Eluent (b) Chromatogram (c) Solvent front (d) Base line
• The iodine present in water can be separated by which one of the following techniques:(a) Sublimation (b) Chromatography (c) Filtration (d) Solvent extraction
• Rate of filtration can be increased using: (a) Desiccator (b) Chromatographic tank (c) Cold finger (d) Suction flask
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• A component having small value of K (distribution coefficient) mostly remains in: (a) Stationary phase (b) Mobile phase (c) Chromatographic tank (d) None of these
• Direct conversion of solid into vapors is called: (a) Crystallization (b) Sublimation (c) Distribution (d) Vaporization
• The most common solvent used in solvent extraction is: (a) Acetone (b) Ethanol (c) Rectified spirit (d) Diethyl ether
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• Which of the following substance shows the property of sublimation? (a) Sodium chloride (b) Ammonium chloride (c) Copper chloride (d) Acetic acid 
• When an organic compound which is volatile or thermally unstable it is separated by: (a) Crystallization (b) Sublimation (c) Solvent extraction (d) Chromatography
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• Iodine can be purified by process of: (a) Evaporation (b) Saponification (c) Sublimation (d) Crystallization
• Insoluble particles can be separated from a liquid by: (a) Sublimation (b) Solvent extraction (c) Filtration (d) Crystallization
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• Repeated extraction using small portion of solvent are more: (a) Accurate (b) Efficient (c) Slow (d) Rapid
• The chromatography in which stationary phase is liquid is called: (a) Partition chromatography (b) Column chromatography (c) Adsorption chromatography (d) All of these
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• Which one is the example of cubic crystals? (a) Graphite (b) Sugar (c) Borax (d) Diamond
• The boiling point of the halogens: (a) Increase down the group (b) Decrease down the group (c) Remains constant (d) can’t be predicted
• Vapor pressure of a liquid in a closed container depends upon: (a) Surface area of container (b) Temperature (c) Amount of liquid (d) All of these
• A crystal system in which all the axes and angles are unequal is called: (a) Tetragonal system (b) Monoclinic system (c) Triclinic system (d) Cubic system
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• At Murree hills water boils at: (a) 98oC (b) 100oC (c) 0 oC (d) 50oC
• Which of the following does not form a molecular crystal? (a) Ice (b) Graphite (c) Iodine (d) Sugar
• Evaporation causes: (a) Cooling (b) Heating (c) Boiling (d) irritation
• Diamond and graphite are example of: (a) Isomorphism (b) Polymorphism (c) Isomerism (d) Allotropy
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• Dipole-induced dipole forces are also called: (a) London dispersion forces (b) Debye forces (c) Huckel forces (d) Electrostatic forces
• Negative charge on cathode rays we established by: (a) William Crook (b) J. Perrin (c) R.A Millikan (d) Hittrof
• An orbital which is spherical and symmetrical is:  (a) s-orbital (b) p-orbital (c) d-orbital (d) f-orbital
• Angstrom is the unit of:  (a) time (b) length (c) mass (d) frequency