Chemistry Fsc Part 1 Online Test With Answers

Chemistry Fsc Part 1 Online Test

Sr. # Questions Answers Choice
1 The sign of Delta H during melting is. Negative Positive Zero Can't be predicted
2 When a bond is formed Energy is absorbed Energy is released Delta H is always zero No energy change
3 The system that exchanges heat but not mass Closed Rigid Open Isolated
4 Which law states that enthalpy change is independent of the path taken. Hess's law Boyle's law Avogadr's law Dalto's law
5 The SI unit of enthalpy Calorie eV kj mol-1 J mol-1
6 Delta H for an endothermic reaction is Positive Negative Zero Depends on temperature
7 Which of the following is always negative in an exothermic reaction. Delta H Activation energy Entropy  Delta S
8 Consider a reaction with Delta H > 0 and Delta S<0 this reaction will be Spontaneous at all temperaturres Non spontaneous at all temperature Spontaneous only at high temperatures Spontaneous only atlow temperature
9 The enthalpy change for a reaction depends on. Pathway taken from reactants to products Presence of a catalyst Intitial and final states of the reactants and products Rate of the reaction
10 Which of the followng factors would lead to a greater enthalpy chage of hydration . A larger ionic reduis and a smaller charge A smaller ionic radius and a smaller charge A larger ionic radius and a larger charge A smaller ionic radius and alarger charge
11 Which of the followng quantitites is NOT typically determined using Hess's Law. Enthalpy change of formation  Activation energy Enthalpy chage f combustion Enthalpy chage of reaction 
12 The calorie content of food, often expressed in Calories (keal), is fundamentally related to which thermodynamic quantity during its metabolism or combustion. Enthealpy change Entropy change Gibbs free engnergy change Specific heat capacity
13 Suppose there are 100 molecules of a gas initially in jar A, which is connected to an evacuated jar B, When the stopcock is opened, the positive ways of arrangement of molecules will be  100 1/100 2/100 1/2 
14

Liquid crystals are used in thermometers becasue.

 <p>They arehighly reflective</p> <p>They glow at high temperatures</p> <p>Their color changes with temperature</p> <p>They conduct electricity</p>
15

Which of the following is NOT a property of liqud crystals.

 <p>Fludity</p> <p>Rigidity like crystals</p> <p>Complete isotropy</p> <p>Viscosity</p>
16

Why are cholestric liuquid crystals useful in medical diagonostics.

 <p>They kill bacteria</p> <p>They reat with tumors chemically</p> <p>They detect temperatur edifferences</p> <p>They absorb X -rays</p>
17

Which of the following is a unique optical property of liquid crystals.

 <p>They reflect ultravolet light</p> <p>They are always opaque</p> <p>They are anisotropic</p> <p>They are isotropic</p>
Download This Set

Is this page helpful?