Solved Physical Chemistry MCQs for Undergraduate Programs online Exams
Physical Chemistry MCQs
Amount of solute dissolved in unit volume is called
A. mass
B. concentration
C. molality
D. ppm
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If 2g of NaCl is dissolved in 20g H2O,then percentage of solution is
A. 5%
B. 7%
C. 9%
D. 12%
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Select the incorrect expression related to percentage composition.
A. m/m%
B. v/v %
C. m/v %
D. m/d%
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SI unit of pressure is Pa. it is equal to
A. 1Nm
B. 1N/M
C. 1N/m
D. 1N/m2
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Which one is more compressible?
A. gas
B. liquid
C. solid
D. solution
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Which one of following is not related to one another?
A. 1L=1dm3
B. 1ml=1cm3
C. 100L=100dm3
D. 1m3=10cm3
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1 mole of gas at STP would have
A. 6.02×1022 molecules
B. 6.02×1023 molecules
C. 6.02+1023 molecules
D. 6.02+1022molecules
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Select the concentrated solution from following
A. 1N
B. 10ppm
C. 5ppm
D. 10%
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Molar volume of gas at STP is
A. 22.4 dm2
B. 22.4 dm-2
C. 22.4dm3
D. 22.4m3
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Energy required to overcome a reaction is called
A. minimum potential energy
B. activation energy
C. maximum potential energy
D. specific heat
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Read Also >> Analytical Chemistry MCQs
Unit of activation energy is
A. J/mol
B. J
C. Cal/mol
D. erg/mol
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Moles of solute in kg of solvent is given as
A. Molarity
B. Molality
C. percentage
D. parts per million
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Which of the following is temperature independent quantity?
A. mass
B. volume
C. density
D. molarity
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1 atm =
A. 600torr
B. 760torr
C. 670torr
D. 700torr
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1J=
A. 1N
B. 1N/m
C. 1N/m2
D. 1N.m
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Relation between amount of energy absorbed by a substance and its concentration is given by
A. Lambert law
B. Beer’s law
C. Avogadro’s law
D. Snell’s law
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Unit of conductivity is
A. ohm-1
B. ohm
C. N
D. Nm
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Formula of surfactant is
A. NaC12H25SO4
B. NaC4H2SO4
C. NaC10H25SO4
D. NC12H25SO4
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Surfactants are the substances that get adsorbed at the surface and surface tension is
A. increased
B. decreased
C. varied
D. remain constant
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The instrument used for measuring number of drops is
A. gravity bottle
B. Stalagmometer
C. pycnometer
D. both b and c
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What volume of 0.1M stock solution is required to prepare 25 ml of 0.06 M solution.
A. 10 ml
B. 15ml
C. 20ml
D. 25ml
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If 10ml of urea solution is dissolved in 90ml H2O,
then percentage of solution is
A. v/v%
B. v/m%
C. m/m%
D. m/v%
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When unsaturated solution is concentratedup to limit,it changes into
A. unsaturated solution
B. supersaturated solution
C. saturated solution
D. colloidal solution
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Surface tension can be measured by using
A. gravity bottle
B. pycnometer
C. conductometer
D. both a and b
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Mass of KCl required to prepare 8% KCl is
A. 5g
B. 8g
C. 10g
D. 13g
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Molecular weight of n-hexane is
A. 75g/mol
B. 86g/mol
C. 88 g/mol
D. 77g/mol
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Select the statement which is not related to homogeneous mixture.
A. It has single phase
B. It has homogeneous composition
C. Its example is solution of sand in water
D. It is composed of two or more different molecular or ionic substances
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A sample with white color demonstrates that absorption is
A. 1%
B. 10%
C. 100%
D. 0%
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One mole of SO2 has
A. NA atoms
B. NA Molecules
C. NA formula unit
D. None
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Molecular weight of methane is
A. 16g/mol
B. 14g/mol
C. 18 g/mol
D. 17g/mol
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Acid turns litmus paper
A. Red-blue.
B.blue-red.
C. Yellow.
D. orange
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Which of the molecule is not linked by covalent bond?
A. water
B. common salt
C. ammonia
D. methane
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For 1 mole of carbon and 1 mole of helium which term is same?
A. Mass
B. atom
C. molecules
D. density
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Which of the following is a concentration unit?
A. nm
B. ml
C. Gram
D. ppm
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Maximum value of transmittance is
A. 1
B. 10
C. 100
D. 2
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The kinetics of fading of phenolphthalein in basic solution is
A. 1st order
B. 2nd order
C. 3rd order
D. 0th order
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Concentration of solute and solvent can be expressed in
A. mass
B. volume
C. moles
D. all of these
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Carbon exist in
A. isomers
B. Tautomer
C. isotopes
D. all of these
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Helium doesnot contain
A. Two protons.
B. One electron.
C. Two neutrons.
D. Two electrons
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In Tautomerism, there is change in position
A. O
B. H
C. bond
D. molecule
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In aqueous solutions,
A. solvent is used in small quantity
B. solvent is not water
C. water is solvent
D. solvent is used in large quantity
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Which one of the following is optically active substance?
A. water
B. sodium chloride
C. sucrose
D. ethanol
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In spectrophotometer light is studied as function of its
A. frequency
B. amplitude
C. wavelength
D. speed
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Infrared radiations are feel as
A. visible light
B. heat
C. sunburn
D. light
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Height of wave is known as
A. frequency
B. amplitude
C. wavelength
D. speed
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Colored compounds show absorption at
A. all wavelengths
B. no wavelength
C. at specific wavelengths
D. visible region
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Photometer measures
A. polarity
B. absorption
C. transmittance
D. reflection
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In Photometer path length through the sample containing specie is measured in
A. cm
B. m
C. mm
D. nm
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In general, plot of absorbance as a function of concentration is
A. curved
B. non-linear
C. linear
D. varied
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Method of photometer is used to determine
A. wavelength
B. absorption
C. transmittance
D. concentration
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