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 A system absorbs 100 kJ heat and performs 50 kJ work on the surroundings. The increase in internal energy of the system is 50kJ 100 kJ 150kJ 5000 kJ
2 The enthalpy change AH of a process is given by the relation ΔΗ =ΔΕ + P∆V ΔH=ΔE +W ΔH =ΔΕ-ΔnRT ΔΕ =ΔΗ + P∆V
3 ΔH° represent the enthalpy change at 0°C and 1 atm pressure 25°Cand 1atm 0K and I atm pressure 25°C and 2 atm pressure
4 Born-Haber cycle is an application of Hess's law 1" law of thermodynamics Avogadro's law 1law of thermochemistry
5 Neutralization of acid-base is Spontaneous Exothermic Non spontaneous Both "a" and "c
6 The change in enthalpy when one mole of a substance is dissolved in a specified quantity of solvent at a given temperature is called Heat of reaction Heat of solvation Heat of combustion Heat of solvent
7 Which of the following enthalpy change always have a negative value ∆Hf ∆H sol ∆Hc ∆Hat
8 The change in enthalpy of a system when one mole of the substance is completely burnt in excess of air or oxygen is called Heat of reaction Heat of formation Heat of atomization Heat of combustion
9
By convention, the standard heat of formation of all elements is assumed to be
 Zero positive Negative Infinity
10 One kilo calorie is equal to 4.184J 1000J 4184J 1kJ
11 ∆H=∆E is true for which of the following reaction K+H2O----->KOH+H2 N2+3H2------>2NH3 AlCl3+3NaOH--->Al(OH)3+3 NaCl 4Na + O2----->2Na2O
12 Which of the following processes has always. ∆H=-ve Formation of compound Dilution of a solution Dissolution of ionic compound Combustion
13 Enthalpy of a system can be calculated by which of following relationship q=ΔΕ q=m×S×∆T q=pv q=m×v×∆T
14 One of the best applications of Hess's law to calculate the lattice energy of ionic compound is Measurement of enthalpy change in a calorimeter Studying of first law of thermodynamics Measurement of a heat of formation of a compound Born-Haber cycle
15 How much heat is absorbed by 100 g of water when its temperature decreases from 25°C to 5°C? (heat capacity is 4.2 J/gK) 84,000J 2000/4.2J -2000/4.2j -8400J
16 Whenever a reaction is endothermic, then it means that Heat is transferred system to the surrounding Heat is transferred from surrounding to the system Heat content of the products is less than that of reactants Heat content of the reactants is greater than the products
17 Enthalpy of neutralization (∆H°n) per mole of H2SO4/ Ba(OH)2 is +57.4 kJmol-1 -114.8 kJmol-1 -57.4 kJmol-1 -57.4 kJmol-1
18 In order to determine ∆H (latt) of ionic compound which is correct relationship ∆H latt. = ∆Hf - ∆Hx ∆H latt. = ∆Ha + ∆Hv ∆H latt. = ∆Hf + ∆Hx ∆H latt. = ∆Hf - ∆H sol.
19 Enthalpy of a reaction can be measured by Glass calorimeter Barometer Manometer Thermometer
20 If internal energy of the system is increased Change in state of the system may occur Temperature of the system may rise Chemical reaction may take place All of these
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