B.Sc. First year
Undergraduate degree course Semester second Physical chemistry paper IV
Chapter -Liquid state
Multiple Choice questions:
1. The molecules which have partial positive charge at one end and a partial negative charge at the other are called
a) ion-pairs
b) charged molecules
c) dipoles
d) electric molecules
2. The momentary attractions between the molecules of a liquid caused by instantaneous dipole and induced-dipole attractions are called
a) van der Waals forces
b) polar forces
c) French forces
d) London forces
3. Association of molecules in water is due to
a) surface tension
b) viscosity
c) hydrogen bonding
d) optical activity
4. The liquid crystals have
a) properties of super cooled liquid
b) properties of amorphous solids
c) the fluidity of a liquid and optical properties of a solid
d) none of these
5. p-Ozoxyanisole is an example of
a) semi conductor
b) super conductor
c) liquid crystal
d) none of these
6. The strength of H-bonding is about _______ as that of a covalent bond
a) 1/2
b) 1/3
c) 1/10
d) 1/100
7.------may be regarded as a collection of molecules held close to each other and executing random motion through intervening spaces.
a) Amorphous solid
b) crystalline solid
c) gas
d) liquid
8. The intermolecular forces in liquids are collectively called-------
a) Van der Waals forces
b) London forces
c) dipole forces
d) Hydrogen bonds
9. London dispersion forces exist in ----- molecules.
a) ionic
b) covalent
c) monoatomic
d) non-polar
10. What type of inter particle forces holds liquid N2 together?
a) ionic bonding
b) London forces
c) hydrogen bonding
d) dipole-dipole interaction
11. Dipole interactions exist in ------molecules.
a) non-polar
b) polar
c) metallic
d) ionic molecules
12. Which response includes only those compounds that can exhibit hydrogen bonding?
a) AsH3, H2Te
b) AsH3, CH3NH2
c) CH4, AsH3, H2Te
d) CH3NH2, HF
13. The molecules having partial positive charge at one end and a partial negative charge at the other are called---------
a) ion-pairs
b) charged molecules
c) dipoles
d) electric
14. Which one of the following elements is not likely to participate in a hydrogen bond?
a) O
b) F
c) S
d) N
15. The momentary attraction between the molecules of a liquid caused by instantaneous dipole and induced-dipole attractions are called -------forces.
a) London
b) polar
c) Van der Waals
d) French
16. Which one of the following substances has London dispersion force as its only intermolecular force? (No hydrogen bonding, no dipole-dipole forces.)
a) CH3OH
b) NH3
c) H2S
d) CH4
17. Which of the following states of matter has a definite volume but not definite shape
a) solid
b) Liquid
c) gas
d) none of these
18. Which of the following statement is correct about smectic liquid crystals?
a) they tlow readily thansmectic liquid crystals
b) they have liquid like character
c) their viscosity is lower than that of liquids
d) all of these
19. Liquid crystals are usually composed of
a) circular molecules
b) rod like molecules
c) oval molecules
d) triangular molecules
20. Which of the following statements is not true about smectic liquid crystals?
a) They have limited mobility
b) They do not flow as normal liquids
c) The concept of viscosity is applicable to them
d) They show X-ray diffraction patterns.
21. Nematic is a type of liquid crystal which is based upon
a) ordering
b) molecules
c) surface area
d) surface tension
22. Cholesteryl benzoate is an example of -----------crystal
a) smectic
b) nematic
c) cholesteric
d) solid
23. In liquid crystals, temperature affect the
a) magnetic field
b) electric field
c) neutron field
d) electromagnetic field
Click here For pdf file
1) Mathematical concepts MCQ
2) Gaseous State MCQ
3)Liquid State MCQ
4) Solid State MCQ
5)Chemical kinetics MCQ
6) Catalysis MCQ
7) Colloidal State MCQ
For regular updates Join with us on TELEGRAM
 Semester second, Physical chemistry paper IV ){kind=link}