PPSC Chemistry Part I Physical Chemistry Online Test With Answers

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PPSC Chemistry Part I Physical Chemistry Online Test

Sr. # Questions Answers Choice
1 The rate constant of a reaction has same units as the rate of the reaction The reaction is of. Second order First order Three order Zero order
2 The dimensions for first order rate constant are. s-1 s mol-1 mol-1 s-1 s
3 The rate constant of a reaction depends on Concentration of reactants Concentration of products Temperature Time
4 The rate at which a substance reacts depends on its. Molecular mass Active mass Equivalent mass Molar mass
5 Usually the rate of the reactions is expressed as. mol dm-1 mol dm-3 s-1 mol dm-2 s-1 mol 2 dm-3 s-1
6 The change in the concentration of the reactant of product per units time is called. Order of the reaction Melecularity of the reaction Rate of reaction None of the above
7 Which of the following factors does not effect the rate of the reaction. Pressure Temperature Concentration Catalyst All of the above
8 The branch of chemistry which deals with the rate of reaction as well as mechanism is known as Wave mechanism Classical thermodynamcis Chemical kinetics Phtochemistry
9 A compound with an congruent melting point decomposes on heating into. A liquid of the same composition as the solid A new solid phase and a solution with a compositional from that of the solid phase A new solid phase and a solution with the same composition as that of the solid phase A solution of fixed composition
10 The temperature of which the compound melts into a liquid to the same composition as the solid is called the Congruent melting point Incongruent melting point Peritectic temperatures Metastable point
11 The number of degree freedom at the triple point for the water system in. One Two Three Zero
12 The number of degrees of freedom and number of components for a system of containing undissolved salt , in equilibrium with water vapor are. 2,2 3 , 2 1 , 1 1 , 2
13 For a single -component system, the maximum degree of freedom in 1 2 3 Between 3 and 6
14 Sulphur can exist in One phase Two phase Three phase Four phase
15 The maximum degree of freedom for a pure substance under equilibrium constitutions is 1 2 3 zero
16 In a one -component system the maximum number of phase that can consist in equilibrium is. 1 2 3 4
17 In a system , when the chemical potential of each component is the same for all phases. the equilibrium is said to be in Metastable equilibrium Thermal equilibrium Composition equilibrium Mechanical equilibrium
18 The phase rule was deduced by Gibbs Thomson Troution Henry
19 In terms of number of phases (p) components (C) and degree of freedom (F) the phase rule is expressed as. P + C = F + 2 F = P+ C - 2 P + F= C + 2 P - F = C = 2
20 The number of phases of mixtures of four gases enclosed in a container is 1 4 4-1 zero
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