ECAT Chemistry Online Test With Answers

ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 The heat of formation of graphite and P(white) is ______ KJ/mole 0.00 -273.0 +8.7 813.99
2 The standard enthalpy change in the formation of 1 mole of a compound from its elements in their standard physical states is Enthalpy of formation Enthalpy of atomization Enthalpy of neutralization Internal energy change
3 Heat absorbed or released during the chemical reaction of physical process at constant pressure is equal to
4 There is no change in temperature No change in volume Heat is absorbed Heat is released
5 Positive sign Negative sign Without any sign None
6 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
7 A state function of the system which describes together the internal energy and the work done is called Enthaply Internal energy Work Free energy
8 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
9 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
10 The heat contents of all the elements in their standard states are taken to be 1 2 0 None
11 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
12 Born-Haber cycle is an application of First of thermodynamics Second law of thermodynamics First law of thermodynamics Hess's law
13 For a given process, the heat change at constant pressure (p) and constant volume (v) are related to each other as
14 Which is not state function Temperature Enthaply Entropy Internal energy
15 The energy required to break one mole of bonds to form neutral atoms is called Bond length Bond strength Bond energy None of these
16 Which property depends on the state of system Enthaply Free energy Entropy All these
17 The sun of all the energies of atoms, molecule, ion, within system is called Enthalpy K.E. of the system Internal energy None
18 Lattice energy of NaCI +5000 KJ -344 KJ -776 KJ -411 KJ
19 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
20 If heat absorbed in the reaction, the process is said to be Exothermic Isothermal Adiabatic Endothermic
21 The branch of chemistry which deals with thermal energy changes in chemical reactions is called Chemical kinetic Thermodynamics Thermochemistry Mechanics
22 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
23 One calorie is equal to 5.184 J 3.184 J 4.184 J 7.184 J
24 Pressure volume work is
25 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
26 Any substance under going physical or chemical change is said to be Surrounding System Losphere Lithosphere
27 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
28 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
29 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
30 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
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