Chemistry MCQ Quiz Hub

1. Ice is ___________ crystal
Metallic
Molecular
Covalent
Ionic

2. Select a pair of compounds which are isomorphic in nature.
NaCI and KNO3
MgO and NaF
KNO3 and MgO
NaF and CaCO3

3. The viscosity of solids is
Infinite
Negligible
Medium
No concept of viscosity in solid

4. a?b?c ?????#90? is representation of crystal system
Monoclinic
Triclinic
Hexagonal
Trigonal

5. The phenomenon in which a compound exists in two or more crystalline forms is called
Isomorphism
Polymorphism
Anisotropy
Allotropy

6. Which solids are called true solids?
Metallic
Amorphous
Crystalline
Vitreous

7. Bucky balls is an allotropic from of
Sulphur
Carbon
Silica
Tin

8. The number amino acid units for each turn of helix on average are
21
23
25
27

9. Isomorphic substances have
Same physical and chemical properties
Same physical and different chemical properties
Different physical and same chemical properties
Different physical and chemical properties

10. If a physical and chemical change takes place at a constant pressure then the heat change during the process is called
Heat of transition
Heat of fusion
Enthalpy change
All of above

11. The pressure during the molar heat of fusion is kept
0 atmosphere
one atmosphere
2 atmosphere
10 atmosphere

12. The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is
Molar heat of sublimation
Molar heat of fusion
Molar heat of vapourization
Latent heat of that liquid

13. All the enthalpy changes are
Negative
Positive
May or may not be a or b
none

14. Which one is not state function
Internal energy
Enthalpy
Gibbs free energy
Work

15. If ?H value is less than zero than reaction will be
Exothermic
Endothermic
May or may not be Exothormic or Endothermic
None of these

16. If internal energy of the system is increased
Change in state of the system is increased
Temperature of the ystem may rise
Chemical reaction may take place
All

17. Which is true for a spontaneous endothermic process?
?H<0
?G<0
?S<0
?G>0

18. A reaction has values of ?H and ?S which are both positive. The reaction
Is spontaneous
Spontaneity is temperature dependent
Has an increasing free energy
Is non-spontaneous

19. ________________ is study about energy of a chemical system
thermochemistry
thermodynamics
chemical kinetics
stoichiometry

20. The environment in which a system is studied is
State function
phase
surrounding
state

21. Unit of heat in SI system is
J
KCaL
Cal
GJ

22. Anything which depends upon initial and final state of a system is
environment
surrounding
state function
enthalpy

23. Total energy of a system is
P.E + K.E
P.E + heat energy
K.E + heat energy
P.E + mechanical energy

24. Mathematical form of first law of thermodynamics is
?H=qp
?E = q + W
?E = q x v
all of the above

25. Reaction in which heat evolves is called
endothermic
spontaneous
non-spontaneous
exothermic

26. CuSO4 + Zn?ZnSO4+Cu is
Spontaneous reaction
Non-spontaneous reaction
Endothermic
Exothermic

27. Pumping of water uphill is
spontaneous process
non-spontaneous process
irreversible process
reversible process

28. State function the macroscopic property of system depends upon
path of reaction
initial state
final state
initial and final state

29. Which one of the following is a state function?
pressure
temperature
enthalpy
all of the above

30. When enthalpy of reactants is higher than product then reaction will be
endothermic
spontaneous
non-spontaneous
exothermic

31. Enthalpy of a reaction can be measured by
glass calorimeter
manometer
Barometer
thermometer

32. Enthalpy of combustion for food fuel and other compounds can be measured accurately by
glass calorimeter
bomb calorimeter
thermometer
manometer

33. The attice energy of NaCl is
?787 KJ/mole
787 J/mole
780 KJ/mole
790 KJ/mole

34. Most of thermodynamic parameters are
system
surrounding
phase
state functions

35. ?H of a system can be calculated by which of following relationship
q=m x s x ?T
q=?E
q=m x v x ?T
q = pv

36. Change in enthalpy (H) of a system can be calculated by following relationship
?H=?E+P?V
?H=?E-PV
?H=?E-q
?H=?E+q

37. Which of the following is correct
qp>qv
?E < ?H
?E>?H
Both a & b

38. Two fundamental ways to transfer energy are
pressure and temperature
pressure and volume
heat and work
heat and volume

39. Which of the following processes has always ?H = -ve
formation of compound
combustion
dissolution of ionic compound
dilution of a solution

40. Enthalpy change can be
calculated by Hess law
can be measured by calorimeter
both a and b
none

41. If there is interconversion of solid and liquid states then
?V = 0
?H= ?E
?H > ?E
both a & b

42. In order to determine ?hlatt of ionic compound which is correct relationship
?hlatt = ?Hf - ?Hx
?hlatt = ?Hf + ?Hx
?hlatt = ?Ha + ?Hv
?hlatt = ?Hf - ?hsol

43. Hess law can be applied to determine
?Hf
?Hlatt
?Hcomb
All of the above

44. Which of the following element act as inert electrode
Cu
Ag
Pt
None

45. If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs?
H2 is deposited at cathode
Colour of the solution becomes fade
Cu is deposited at anode
All are possible

46. Stronger the oxidizing agent greater is the
Oxidation potential
Reduction potential
Redox potential
emf of cell

47. Which has maximum oxidation number?
N
Cr
S
Mn

48. Which of the following cell is not rechargeable?
Lead storage battery
Silver oxide cell
Fuel cell
Ni-Cd cell

49. In an electrolytic cell current flows ?
From cathode to anode in outer circuit
From anode to cathode outside the cell
From cathode to anode inside the cell
both b & c

50. Which of the following is true in the case of Zn-Cu cell?
The flow of electrons takes place from copper to zinc
E0red of copper electrode is less than that of zinc electrode
Zinc acts as an anode and copper as cathode
All are correct