Chemical Equilibrium With Answers

Chemical Equilibrium

Sr. # Questions Answers Choice
1 A reversibel reaction is one which  Proceeds to completion Occurs only in one direction  Proceeds in both directions Has no products
2 The reversibel reation cannot be achieved in Open system Closed system Both a and b None of these
3 Which one of the following is not an example of reversible reaction. Formation of ammonia Foramtion ow water Decomposition of PCl5 Decomposition of NO2
4 For a specific reaction the valu eof the equilibrium constant, Kc? Always remains the same at differrent reaction conditions Increases if the concentration of one ofthe product is increased Changes with changes in the temperature Increasees if the concentration of one of the ratants is increased
5 Consider the equilibrium 2H2 +O2................ 2H2O. If the concentration of H2O is increased, the concentrations of H2 and O2 will Increses Decrease Remain the same Change irregularly
6 Kc = 0.040 at 450 oC for the teh given reaction, evaluate Kp for the reaction.
Pcl5        ......................... PCl2 + Cl2		 0.40 2.4 0.64 0.052
7 Consider the gas phase equilibrium sysem represented by teh equation 2 H2O................ 2H2+O2 Givent that the forward reactio is endothermic, which of the following chagnes will decrease the equilibrium amount of H2O. Adding more oxygen Adding a solid phase catalyst Decreasing the volume of the container  Increaseing the temperature at constant pressure
8 Which of the following statemetns correctly describes the effect of temperature on the equilirium constant. Kc is directly proportional to temperature Kc is inversely proportional to temperature. Kc depends on the enthalpy change of the reaction Temperature has no effect on the value of Kc
9 A saturted solution represents a dynamic equilibrium Macroscopically, the concentration of dissolved solute is constant, Microscopically this occurs because. No more solute particles are dissolving The rate of dissolution of solute is zero Solute particles are dissolving and precipitating at the same rate All solute particles have dissolved
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