MDCAT Chemistry Chapter 7 Reaction Kinetics Online Test With Answers

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MDCAT Chemistry Chapter 7 Reaction Kinetics Online Test

Sr. # Questions Answers Choice
1 Change in enthalpy (∆H) of a system can be calculated by ∆H=∆E - PV ΔH =ΔE +q ∆H = ∆E - q ∆Η = ΔΕ + P∆V
2 Choose from the followings the correct statement about Born Haber cycle Born Haber cycle is different from Hess's law The energy changes in a cyclic process is not zero The lattice energy of crystalline substances can be calculated easily None
3 Enthalpy of formation of one mole of ionic compound form gaseous ion under standard condition is called Gibb's energy Gibb's energy Bond energy Lattice energy
4 According to Hess's law, the enthalpy change for a reaction Depends on path Independent of the path The sum of ∆E and ∆H None of these
5 Decomposition of H2O is Endothermic reaction Nuclear reaction Exothermic reaction Zero nuclear reaction
6 The lattice energy of NaCl is 787 j/ mole 790 kj/mol 780 kJ/ mol -787 kI / mole
7 The value of ∆V being very small. The term P∆V can be neglected for process involving Liquid and gas Solids and gases Liquid and solid None of these
8 The enthalpy change for the reaction C2H2 + 5/2 O2 --------> 2CO2 + H2O is known as enthalpy of Fomation of CO2 Fusion ofC2H4 Combustion of C2H4 Vaporization of C2H2
9 A state function which describes together the internal energy and product of pressure and volume is called Enthalpy internal energy Work Kinetic energy
10 The enthalpies of all elements in their standard states are Unity always +ve always -ve zero
11 Total heat content of a system is called Internal energy Entropy Enthalpy All of these
12 The measurement of enthalpy change at standard conditions means that we should manage the measurement at 24°C at 1 atm 25°C at 1 atm 0C° at 1 atm 100C° 1 atm
13 Most of the reactions which give stable products are Endothermic Exothermic Isothermal Non of these
14 During an exothermic or endothermic reaction which one of the following formula is used to calculate the amount of heat evolved or absorbed ΔΗ = ΔΕ+PV ∆E= q+w Δp =ΔΗ q = m x s x ∆T
15 The exothermic process is Evaporation Sublimation Respiration Boiling
16 The heat of reaction depends upon Temperature of the reactants Physical states of the reactants and the products Both A) and B) Path of the reaction and the temperature
17 One Joule is equivalent to 4.184 cal. 0.4184cal. 1/2 cal. 1/4.184 cal
18 If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air will Remains constant Increase Decrease Either increase or decrease One Joule is equivalent to
19 What is not correct about ∆HF It is always negative Ìts value gives an idea about the relative stability of reactants and the products. Its value can be greater or less than zero Value depends upon nature of bonds
20 What is correct about heat of combustion It is applicable to gaseous substances only It is always negative It is always positive It is positive in some cases while negative in other
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