ECAT Chemistry Chapter 7 Thermo Chemistry Online Test With Answers

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ECAT Chemistry Chapter 7 Thermo Chemistry Online Test

Sr. # Questions Answers Choice
1 Work is a State function Only function Non-state function State
2 When a system absorbs energy, the sign of delta E is Neither positive nor negative Negative Positive None of above
3 When no work is done by the system The volume of system decreases The volume of system increases The volume of system does not change None of above
4 By state, we mean the Reaction of system Scope of a system Condition of a system None of above
5 Some non-spontaneous processes can be made to take place by supplying energy to the system from Internal source Any source External source All of above
6 Burning of coal and hydrocarbon in air are examples of Non-spontaneous reaction Spontaneous reaction Natural reaction Both b and c
7 A reaction will also be called a spontaneous if It does not 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 start with
8 The reaction of Zinc with copper sulphate solution is an example of Oxidation reduction reaction Spontaneous reaction Spontaneous redox reaction Non-spontaneous reaction
9 When a piece of zinc is added to the copper sulphate solution, _______ colour of solution disappear Pink Purple Blue Brown
10 Neutralization of a strong acid with a strong base is Natural acid base reaction Artificial acid base reaction Spontaneous acid base reaction both a and c
11 Which one of the following is not related to spontaneous process Unidirectional Real Irreversible Artificial
12 A process which takes place on its own without any outside assistance and moves from a non-equilibrium state towards an equilibrium state is termed as Spontaneous process Natural process Non-spontaneous process Both a and b
13 The subject matter of first law of thermochemistry is based on First law of Thermochemistry First law of Thermodynamics Second law of Thermochemistry Second law of Thermodynamics
14 The energy units in which heat changes usually expressed in SI-system are Joule Calorie Kilo Joule Both a and c
15 In a chemical change, the energy in the form of heat will either be evolved or absorbed and this is called Endothermic Heat of products Exothermic reaction Heat of reaction
16 It is noticed that energy in the form of heat is either evolved or absorbed as a result of a Physical change Chemical change Biological change All of above
17 The majority of reactions which give stable products are Exothermic Isothermal Endothermic Both a and c
18 In endothermic reactions, the heat contents of the surrounding air Remains constant Decreases Increases Fluctuates rapidly
19 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
20 The study of heat changes accompanying a chemical reaction is known as Thermochemistry Biochemistry Physical chemistry Analytical chemistry
21 The net heat 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 princile Hess's law law of conservation of energy
22 Which of the following statements is contrary to the first law of themodynamics Energy can neither be created nor destroyed One form of energy can be transferred into an equivalent amount of other kinds of energy In an adiabatic process, the work done is independent of its path Continuous production of mechanical work without supplying and equivalent amount of heat is possible
23 The change in heat energy of a chemical reaction at constant temperature and pressure is called entahlpy change heat of sublimation bond energy internal energy change
24 Calorie is equivalent to 0.4184 J 41.84 J 4.184 J 418.4 J
25 If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air remains constant increases decreases remain unchanged
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