?H of a system can be calculated by which of following relationship
1.q=m x s x ?T
2.q=?E
3.q=m x v x ?T
4.q = pv
A reaction has values of ?H and ?S which are both positive. The reaction
1.Is spontaneous
2.Spontaneity is temperature dependent
3.Has an increasing free energy
4.Is non-spontaneous
a?b?c ?????#90? is representation of crystal system
1.Monoclinic
2.Triclinic
3.Hexagonal
4.Trigonal
All the enthalpy changes are
1.Negative
2.Positive
3.May or may not be a or b
4.none
Anything which depends upon initial and final state of a system is
1.environment
2.surrounding
3.state function
4.enthalpy
Bucky balls is an allotropic from of
1.Sulphur
2.Carbon
3.Silica
4.Tin
Change in enthalpy (H) of a system can be calculated by following relationship
1.?H=?E+P?V
2.?H=?E-PV
3.?H=?E-q
4.?H=?E+q
CuSO4 + Zn?ZnSO4+Cu is
1.Spontaneous reaction
2.Non-spontaneous reaction
3.Endothermic
4.Exothermic
Enthalpy change can be
1.calculated by Hess law
2.can be measured by calorimeter
3.both a and b
4.none
Enthalpy of a reaction can be measured by
1.glass calorimeter
2.manometer
3.Barometer
4.thermometer
Enthalpy of combustion for food fuel and other compounds can be measured accurately by
1.glass calorimeter
2.bomb calorimeter
3.thermometer
4.manometer
Hess law can be applied to determine
1.?Hf
2.?Hlatt
3.?Hcomb
4.All of the above
Ice is ___________ crystal
1.Metallic
2.Molecular
3.Covalent
4.Ionic
If ?H value is less than zero than reaction will be
1.Exothermic
2.Endothermic
3.May or may not be Exothormic or Endothermic
4.None of these
If a physical and chemical change takes place at a constant pressure then the heat change during the process is called
1.Heat of transition
2.Heat of fusion
3.Enthalpy change
4.All of above
If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs?
1.H2 is deposited at cathode
2.Colour of the solution becomes fade
3.Cu is deposited at anode
4.All are possible
If internal energy of the system is increased
1.Change in state of the system is increased
2.Temperature of the ystem may rise
3.Chemical reaction may take place
4.All
If there is interconversion of solid and liquid states then
1.?V = 0
2.?H= ?E
3.?H > ?E
4.both a & b
In an electrolytic cell current flows ?
1.From cathode to anode in outer circuit
2.From anode to cathode outside the cell
3.From cathode to anode inside the cell
4.both b & c
In order to determine ?hlatt of ionic compound which is correct relationship
1.?hlatt = ?Hf - ?Hx
2.?hlatt = ?Hf + ?Hx
3.?hlatt = ?Ha + ?Hv
4.?hlatt = ?Hf - ?hsol
Isomorphic substances have
1.Same physical and chemical properties
2.Same physical and different chemical properties
3.Different physical and same chemical properties
4.Different physical and chemical properties
Mathematical form of first law of thermodynamics is
1.?H=qp
2.?E = q + W
3.?E = q x v
4.all of the above
Most of thermodynamic parameters are
1.system
2.surrounding
3.phase
4.state functions
Pumping of water uphill is
1.spontaneous process
2.non-spontaneous process
3.irreversible process
4.reversible process
Reaction in which heat evolves is called
1.endothermic
2.spontaneous
3.non-spontaneous
4.exothermic
Select a pair of compounds which are isomorphic in nature.
1.NaCI and KNO3
2.MgO and NaF
3.KNO3 and MgO
4.NaF and CaCO3
State function the macroscopic property of system depends upon
1.path of reaction
2.initial state
3.final state
4.initial and final state
Stronger the oxidizing agent greater is the
1.Oxidation potential
2.Reduction potential
3.Redox potential
4.emf of cell
The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is
1.Molar heat of sublimation
2.Molar heat of fusion
3.Molar heat of vapourization
4.Latent heat of that liquid
The attice energy of NaCl is
1.?787 KJ/mole
2.787 J/mole
3.780 KJ/mole
4.790 KJ/mole
The environment in which a system is studied is
1.State function
2.phase
3.surrounding
4.state
The number amino acid units for each turn of helix on average are
1.21
2.23
3.25
4.27
The phenomenon in which a compound exists in two or more crystalline forms is called
1.Isomorphism
2.Polymorphism
3.Anisotropy
4.Allotropy
The pressure during the molar heat of fusion is kept
1.0 atmosphere
2.one atmosphere
3.2 atmosphere
4.10 atmosphere
The viscosity of solids is
1.Infinite
2.Negligible
3.Medium
4.No concept of viscosity in solid
Total energy of a system is
1.P.E + K.E
2.P.E + heat energy
3.K.E + heat energy
4.P.E + mechanical energy
Two fundamental ways to transfer energy are
1.pressure and temperature
2.pressure and volume
3.heat and work
4.heat and volume
Unit of heat in SI system is
1.J
2.KCaL
3.Cal
4.GJ
When enthalpy of reactants is higher than product then reaction will be
1.endothermic
2.spontaneous
3.non-spontaneous
4.exothermic
Which has maximum oxidation number?
1.N
2.Cr
3.S
4.Mn
Which is true for a spontaneous endothermic process?
1.?H<0
2.?G<0
3.?S<0
4.?G>0
Which of the following cell is not rechargeable?
1.Lead storage battery
2.Silver oxide cell
3.Fuel cell
4.Ni-Cd cell
Which of the following element act as inert electrode
1.Cu
2.Ag
3.Pt
4.None
Which of the following is correct
1.qp>qv
2.?E < ?H
3.?E>?H
4.Both a & b
Which of the following is true in the case of Zn-Cu cell?
1.The flow of electrons takes place from copper to zinc
2.E0red of copper electrode is less than that of zinc electrode
3.Zinc acts as an anode and copper as cathode
4.All are correct
Which of the following processes has always ?H = -ve
1.formation of compound
2.combustion
3.dissolution of ionic compound
4.dilution of a solution
Which one is not state function
1.Internal energy
2.Enthalpy
3.Gibbs free energy
4.Work
Which one of the following is a state function?
1.pressure
2.temperature
3.enthalpy
4.all of the above
Which solids are called true solids?
1.Metallic
2.Amorphous
3.Crystalline
4.Vitreous
________________ is study about energy of a chemical system
1.thermochemistry
2.thermodynamics
3.chemical kinetics
4.stoichiometry