Solved Physical Chemistry MCQs for Undergraduate Programs online Exams
Physical Chemistry MCQs
Amount of solute dissolved in unit volume is called
If 2g of NaCl is dissolved in 20g H2O,then percentage of solution is
Select the incorrect expression related to percentage composition.
B. v/v %
C. m/v %
SI unit of pressure is Pa. it is equal to
Which one is more compressible?
Which one of following is not related to one another?
1 mole of gas at STP would have
A. 6.02×1022 molecules
B. 6.02×1023 molecules
C. 6.02+1023 molecules
Select the concentrated solution from following
Molar volume of gas at STP is
A. 22.4 dm2
B. 22.4 dm-2
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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Unit of activation energy is
Moles of solute in kg of solvent is given as
D. parts per million
Which of the following is temperature independent quantity?
1 atm =
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
Unit of conductivity is
Formula of surfactant is
Surfactants are the substances that get adsorbed at the surface and surface tension is
D. remain constant
The instrument used for measuring number of drops is
A. gravity bottle
D. both b and c
What volume of 0.1M stock solution is required to prepare 25 ml of 0.06 M solution.
A. 10 ml
If 10ml of urea solution is dissolved in 90ml H2O,
then percentage of solution is
When unsaturated solution is concentratedup to limit,it changes into
A. unsaturated solution
B. supersaturated solution
C. saturated solution
D. colloidal solution
Surface tension can be measured by using
A. gravity bottle
D. both a and b
Mass of KCl required to prepare 8% KCl is
Molecular weight of n-hexane is
C. 88 g/mol
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
A sample with white color demonstrates that absorption is
One mole of SO2 has
A. NA atoms
B. NA Molecules
C. NA formula unit
Molecular weight of methane is
C. 18 g/mol
Acid turns litmus paper
Which of the molecule is not linked by covalent bond?
B. common salt
For 1 mole of carbon and 1 mole of helium which term is same?
Which of the following is a concentration unit?
Maximum value of transmittance is
The kinetics of fading of phenolphthalein in basic solution is
A. 1st order
B. 2nd order
C. 3rd order
D. 0th order
Concentration of solute and solvent can be expressed in
D. all of these
Carbon exist in
D. all of these
Helium doesnot contain
A. Two protons.
B. One electron.
C. Two neutrons.
D. Two electrons
In Tautomerism, there is change in position
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
Which one of the following is optically active substance?
B. sodium chloride
In spectrophotometer light is studied as function of its
Infrared radiations are feel as
A. visible light
Height of wave is known as
Colored compounds show absorption at
A. all wavelengths
B. no wavelength
C. at specific wavelengths
D. visible region
In Photometer path length through the sample containing specie is measured in
In general, plot of absorbance as a function of concentration is
Method of photometer is used to determine