| 1 |
Some Non-spontaneous process can be made to take place by supplying energy to the system from : |
Internal source.
Any source.
External source.
All of above.
|
| 2 |
Burning of coal and hydrocarbon in air are examples of : |
Non-spontaneous reaction.
Spontaneous reaction.
Natural reaction
Both (a) and (C)
|
| 3 |
A reaction will also be called a spontaneous if : |
It does no need energy to start with.
It needs energy to carry the whole process.
It needs energy at the end of reaction.
It needs energy to stat with.
|
| 4 |
The reaction of zinc with the copper sulfate solution is an example of. |
Oxidation reduction reaction.
Spontaneous reaction.
Spontaneous redox reaction.
Non-spontaneous reaction.
|
| 5 |
When a piece of zinc is added to the copper sulfate solution,____________ color of solution disappear. |
Pink.
Purple.
Blue.
Brown.
|
| 6 |
Neutralization of a strong acid with a strong abase is: |
Natural acid base reaction.
Artificial acid base reaction.
Spontaneous acid base reaction.
Both (a) and (c).
|
| 7 |
Which one of the following is not related to spontaneous process. |
<p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Unidirectional.</span><sup><o:p></o:p></sup></p>
Real.
<p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Irreversible.</span><o:p></o:p></p>
Artificial.
|
| 8 |
A process which takes place on its own without any outside assistance and moves from a non-equilibrium stat towards an equilibrium stat is termed as: |
Spontaneous process.
Natural process.
Non-Spontaneous process.
Both (a) and (b).
|
| 9 |
The subject matter of first law of thermochemistry is based on: |
First law of Themochemistry.
First law of Thermodynamics.
Second law of Themochemistry.
Second law of Thermodynamics.
|
| 10 |
The energy units in which heat changes usually expressed in Sl-system are: |
Joule.
Calorie.
Kilo Joule.
Both (a) and (c)
|
| 11 |
In a chemical change, the energy in the from of heat will either be evolved or absorbed and this is called: |
Endothermic.
Heat of products.
Exothermic reaction.
Heat of reaction.
|
| 12 |
It is noticed that energy in the from of heat is either evolved or absorbed as a result of a: |
Physical change.
Chemical change.
Biological change.
All of above.
|
| 13 |
The majority of reactions which give stable products are: |
Exothermic.
Isothermal.
Endothermic.
Both (b) and (c).
|
| 14 |
In endothermic reactions, the heat contents of the: |
Products equal to the reactants.
Reactants more than that of products.
Products more than that of reactants
Both (b) and (c)
|
| 15 |
If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air : |
Remains constant.
Decreases.
Increases.
Fluctuates rapidly.
|
| 16 |
The study of heat changes accompanying a chemical reaction is known as : |
Thermochemistry.
Biochemistry.
Physical chemistry.
Analytical chemistry.
|
| 17 |
Enthalpy of neutralization of all the strong acids and strong bases has the same value because: |
Neutralization leads to the formation of salt and water.
Strong acids and bases are ionic substances.
Acids always give rise to H<sup>+</sup>ions and bases always furnish OH<sup>-</sup>ions.
The net chemical change involve the combination of H<sup>+</sup> and OH<sup>-</sup>ions to form water.
|
| 18 |
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.
Joule's principle.
Hess's law.
Law of conservation of energy.
|
| 19 |
For the reaction : NaOH + HCl---------------> NaCl + H2O the change in enthalpy is called: |
Heat of reaction.
Heat of formation.
Heat of neutralization.
Heat of combustion.
|
| 20 |
For a given process, the heat changes at constant volume ( qv)are related to other as: |
<p class="MsoNormal">q<sub>p</sub>= q<sub>v</sub><o:p></o:p></p>
<p class="MsoNormal">q<sub>p</sub><q<sub>v</sub><o:p></o:p></p>
<p class="MsoNormal">q<sub>p</sub>>q<sub>v</sub><o:p></o:p></p>
<p class="MsoNormal">q<sub>p</sub>=q<sub>v/2</sub><o:p></o:p></p>
|
| 21 |
Which of the following statements is contrary to the first law of thermodynamics? |
Energy can neither be created no destroyed.
One form of energy can be transferred into an equivalent amount of the kinds of energy.
In a adiabatic process, the work done is independent of its path.
Continuous production of mechanical work without supplying an equivalent amount of heat is possible.
|
| 22 |
The change in heat energy of a chemical reaction at constant temperature and pressure is called : |
Enthalpy change.
Seat of sublimation.
Bind energy.
Internal energy change.
|
| 23 |
Calorie is equivalent to : |
0.4184 J
4184 J
4.184 J
418.4 J
|
| 24 |
In endothermic reactions, the heat content of the: |
Products is more than that of reactants.
Reactants is more than than to products.
Both (a) and (b).
Reactants and products are equal.
|
| 25 |
If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air: |
Remains constant.
Increase.
Decreases.
Remain unchanged.
|
| 26 |
A state function is a |
Microscopic property
Macroscopic
Unique property
Both a and c
|
| 27 |
By comparing both initial and final states of the system, we can describe the change taking place in the |
Surrounding
Both a and c
System
None of above
|
| 28 |
Reaction between Zn and CuSO4can be called a system under |
Surrounding
Observation
system
None of above
|
| 29 |
One mole of oxygen confined in a cylinder fitted with a piston is an example of |
Surrounding
System and surrounding
System
State function
|
| 30 |
The real or imaginary surface separating the system from the surrounding is called |
Imaginary line
Boundary
Real line
All of above
|
.gif)
Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
