Chemistry Fsc Part 1 Chapter 7 Online Test

Which process is endothermic and spontaneous

• Neutralization of NaOH with HCl A
• Formation of NH3 from H2 and N2 B
• Formation of H2O from H2 and O2 C
• Evaporation of sea water D

If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air

• Remains constant A
• Increase B
• Decrease C
• Increase a bit D

The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is known as

• Henry's law A
• Hess's law B
• Joule's principle C
• Law of conservation of energy D

The change in heat energy of a chemical reaction at constant temperature and pressure is called.

• Enthalpy change A
• Bond energy B
• Heat of sublimation C
• Internal energy change D

The standard heat of formation is measured at 1 atmosphere and

• 0 ^oC A
• 100 ^oC B
• 293 ^oC C
• 25 ^oC D

Spontaneous processes are mostly

• Reversible A
• Irreversible B
• Not irreversible C
• None of these D

Born Haber cycle is used to determine the

• Lattice energy A
• Enthalpy of formation B
• Enthalpy of ionization C
• Enthalpy of dissociation D

Which of the following statement is contrary to the first law of thermodynamics

• An equivalent amount of heart energy can neither be created nor destroyed A
• One form of energy can be transferred into an equivalent amount of other kinds of energy B
• In an adiabatic process, the work done is independent of its path C
• Continuous production of mechanical work without supplying an equivalent is amount of heat possible D

Which one of the following process is endothermic

• condensation of steam A
• Freezing of water B
• electrolysis of water C
• None of these D

The sum of all kinds of energies of atoms, ions or molecules of a system is known as.

• Kinetic energy A
• Potential energy B
• Internal energy C
• Solar energy D

The S.I. units for the molar heat capacity are

• Joule Cm^-3degree^-1 A
• Joule deg^-1atm^-1 B
• Joule deg^-1mol^-1 C
• Joule deg^-1kg^-1 D

Which substance have delta E = Delta H and no pressure - volume work.

• Liquids only A
• Solids only B
• Gases only C
• Liquids and solids D

In endothermic reactions, the heat content of the

• Products is more then that of reactants A
• Reactants is more than that of products B
• Both a and b C
• Reactant and products is equal D

One of the following statements about Born-Haber cycle is correct. Which is that statement

• Born-Haber cycle is different from Hess's law A
• The energy change in a cyclic process is not zero B
• The lattice energy of the crystalline substances can be calculated easily C
• Heat of formation of the product and the lattice energy of the substance can be calculated simultaneously D

For a given process, the heat change at constant pressure (q_p) and at constant volume (q_v) are related to each other as

• q_p= q_v A
• q_p< q_v B
• q_p> q_v C
• q_p= q_v/2 D

• 
  A
• 
  B
• 
  C
• 
  D

In endothermic reactions, the heat content of the.

• Products is more than that of reactants. A
• Reactants is more than that of products B
• Both a and b C
• Reactants and products are equal D