ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 There is no change in temperature No change in volume Heat is absorbed Heat is released
2 Positive sign Negative sign Without any sign None
3 In an exothermic reaction Enthalpy of reactants is lesser than that of products Enthalpy of reactants is greater than that of products Heat is transferred form surrounding into the system Enthalpy of reactants and products same
4 A state function of the system which describes together the internal energy and the work done is called Enthaply Internal energy Work Free energy
5 The heat energy change during a chemical reaction at constant pressure and at a given temperature is called Change in internal energy Enthaply change Temperature change Work done by the system
6 Heat absorbed by a system when its volume does not change is equal to Internal energy of system Enthalpy of system Increase in internal energy of system Increase in enthalpy of system
7 The heat contents of all the elements in their standard states are taken to be 1 2 0 None
8 Internal energy of a system is equal to Kinetic energy of particles Potential energy due to binding forces between particles Sum of kinetic energy plus potential energy of the particles Heat contents
9 Born-Haber cycle is an application of First of thermodynamics Second law of thermodynamics First law of thermodynamics Hess's law
10 For a given process, the heat change at constant pressure (p) and constant volume (v) are related to each other as
11 Which is not state function Temperature Enthaply Entropy Internal energy
12 The energy required to break one mole of bonds to form neutral atoms is called Bond length Bond strength Bond energy None of these
13 Which property depends on the state of system Enthaply Free energy Entropy All these
14 The sun of all the energies of atoms, molecule, ion, within system is called Enthalpy K.E. of the system Internal energy None
15 Lattice energy of NaCI +5000 KJ -344 KJ -776 KJ -411 KJ
16 The amount of heat evolved or absorbed in a chemical reaction, when the molar quantities of products and reactants being the same as represented in chemical equation. is called Heat of reaction Free energy of reaction Entropy of reaction None of these
17 If heat absorbed in the reaction, the process is said to be Exothermic Isothermal Adiabatic Endothermic
18 The branch of chemistry which deals with thermal energy changes in chemical reactions is called Chemical kinetic Thermodynamics Thermochemistry Mechanics
19 One kilocalrie is equal to 4.184 x 10<sup>3</sup>J 4.184 x 10<sup>4</sup>J 4.184 x 10<sup>2</sup>J None of these
20 One calorie is equal to 5.184 J 3.184 J 4.184 J 7.184 J
21 Pressure volume work is
22 A macroscopic property of a system which describes the initial and final state of the system is called Physical property Chemical property Energy property State function
23 Any substance under going physical or chemical change is said to be Surrounding System Losphere Lithosphere
24 In endothermic reaction, the heat content of the Products is more than that of reactants Reactants is more than that of products Both a and b None of the above
25 N2and O2are present in air but they don't react chemically at ordinary conditions of temperature and pressure because it is a Spontaneous reaction Reversible reaction Exothermic reaction Non-spontaneous reaction
26 Any property which depends upon the T.P and V is said to be Property due to k.E. Property due to PE Both a and b Thermodynamic state
27 The amount of heat evolved or absorbed by keeping reactants and products at one atmospheric pressure at room temperature is called Heat of formation Standard heat of formation Standard enthaply change None
28 Which of the following is not a state function Pressure Temperature Enthalpy Amount of substance
29 Spontaneous reaction is such in which the system decreases its ______ Energy Free energy Entropy All
30 According to the SI-system heat contents are measured in units of Calorie Joules Ergs Watts
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