-
question_answer1)
When in any system at equilibrium state pressure, temperature and concentration is changed then the equilibria shifted to such a direction which neutralize the effect of change. This is known as [MP PMT/PET 1988; DPMT 1985]
A)
First law of thermodynamics done
clear
B)
Le-chatelier's principle done
clear
C)
Ostwald's rule done
clear
D)
Hess's law of constant heat summation done
clear
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question_answer2)
\[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO-Q\,cals\] In the above reaction which is the essential condition for the higher production of \[NO\] [CPMT 1971, 89; MP PMT 1985]
A)
High temperature done
clear
B)
High pressure done
clear
C)
Low temperature done
clear
D)
Low pressure done
clear
View Solution play_arrow
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question_answer3)
A reversible reaction is in equilibrium. If a factor is changed which affect it, then
A)
The speed of forward and backward reaction increases done
clear
B)
The speed of forward and backward reaction decreases done
clear
C)
Only the speed of that reaction increases which nullifies the factor causing increase of speed done
clear
D)
No difference done
clear
View Solution play_arrow
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question_answer4)
Which of the following reactions proceed at low pressure [MP PET 1985; CPMT 1984; MP PMT 1995; RPMT 1997]
A)
\[{{N}_{2}}+3{{H}_{2}}\] ⇌ \[2N{{H}_{3}}\] done
clear
B)
\[{{H}_{2}}+{{I}_{2}}\] ⇌ \[2HI\] done
clear
C)
\[PC{{l}_{5}}\] ⇌ \[PC{{l}_{3}}+C{{l}_{2}}\] done
clear
D)
\[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO\] done
clear
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question_answer5)
Le-chatelier principle is applicable
A)
Both for physical and chemical equilibrium done
clear
B)
Only for chemical equilibrium done
clear
C)
Only for physical equilibrium done
clear
D)
Neither for B nor for C done
clear
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question_answer6)
In the following reversible reaction \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}+Q\]\[Cal\] Most suitable condition for the higher production of \[S{{O}_{3}}\] is [NCERT 1974; DPMT 1983, 89; IIT 1981; MP PET 1992; MP PMT 1990, 91, 94, 99; CPMT 1973, 77, 84, 89, 94, 99]
A)
High temperature and high pressure done
clear
B)
High temperature and low pressure done
clear
C)
Low temperature and high pressure done
clear
D)
Low temperature and low pressure done
clear
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question_answer7)
When the pressure is applied over system ice ⇌ water what will happen? [MP PMT 1990; CPMT 1983; NCERT 1978; DPMT 2002]
A)
More water will form done
clear
B)
More ice will form done
clear
C)
There will be no effect over equilibrium done
clear
D)
Water will decompose in \[{{H}_{2}}\] and \[{{O}_{2}}\] done
clear
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question_answer8)
The reaction\[A+B\]⇌\[C+D\]+heat has reached equilibrium. The reaction may be made to proceed forward by [IIT 1978]
A)
Adding more C done
clear
B)
Adding more D done
clear
C)
Decreasing the temperature done
clear
D)
Increasing the temperature done
clear
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question_answer9)
On the velocity in a reversible reaction, the correct explanation of the effect of catalyst is [MP PMT 1987]
A)
It provides a new reaction path of low activation energy done
clear
B)
It increases the kinetic energy of reacting molecules done
clear
C)
It displaces the equilibrium state on right side done
clear
D)
It decreases the velocity of backward reaction done
clear
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question_answer10)
Select the correct statement from the following [MP PMT 1985]
A)
Equilibrium constant changes with addition of catalyst done
clear
B)
Catalyst increases the rate of forward reaction done
clear
C)
The ratio of mixture at equilibrium is not changed by catalyst done
clear
D)
Catalyst are active only in solution done
clear
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question_answer11)
According to Le-chatelier principle, if heat is given to solid-liquid system, then [MNR 1990]
A)
Quantity of solid will reduce done
clear
B)
Quantity of liquid will reduce done
clear
C)
Increase in temperature done
clear
D)
Decrease in temperature done
clear
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question_answer12)
In the reaction \[A(g)+2B(g)\] ⇌ \[C(g)+Q\,kJ\], greater product will be obtained or the forward reaction is favoured by [MNR 1988; MP PMT 1989, 97]
A)
At high temperature and high pressure done
clear
B)
At high temperature and low pressure done
clear
C)
At low temperature and high pressure done
clear
D)
At low temperature and low pressure done
clear
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question_answer13)
Following gaseous reaction is undergoing in a vessel \[{{C}_{2}}{{H}_{4}}+{{H}_{2}}\]⇌ \[{{C}_{2}}{{H}_{6}}\]; \[\Delta H=-32.7\,Kcal\] Which will increase the equilibrium concentration of \[{{C}_{2}}{{H}_{6}}\] [IIT 1984; MP PET/PMT 1988; MADT Bihar 1995]
A)
Increase of temperature done
clear
B)
By reducing temperature done
clear
C)
By removing some hydrogen done
clear
D)
By adding some \[{{C}_{2}}{{H}_{6}}\] done
clear
View Solution play_arrow
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question_answer14)
The effect of increasing the pressure on the equilibrium \[2A+3B\]⇌\[3A+2B\] is [EAMCET 1980; MP PMT 1991]
A)
Forward reaction is favoured done
clear
B)
Backward reaction is favoured done
clear
C)
No effect done
clear
D)
None of the above done
clear
View Solution play_arrow
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question_answer15)
For the equilibrium \[2N{{O}_{2}}(g)\] ⇌ \[{{N}_{2}}{{O}_{4}}(g)\] \[+14.6\,kcal\] the increase in temperature would [CPMT 1974, 78]
A)
Favour the formation of \[{{N}_{2}}{{O}_{4}}\] done
clear
B)
Favour the decomposition of \[{{N}_{2}}{{O}_{4}}\] done
clear
C)
Not alter the equilibrium done
clear
D)
Stop the reaction done
clear
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question_answer16)
Which of the following factors will favour the reverse reaction in a chemical equilibrium [AIIMS 1982]
A)
Increase in the concentration of one of the reactants done
clear
B)
Removal of at least one of the product at regular time intervals done
clear
C)
Increase in the concentration of one or more products done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer17)
In the formation of \[S{{O}_{3}}\] by contact process, the conditions used are [CPMT 1984]
A)
Catalyst, optimum temperature and higher concentration of reactants done
clear
B)
Catalyst, optimum temperature and lower concentration of reactants done
clear
C)
Catalyst, high temperature and higher concentration of reactants done
clear
D)
Catalyst, low temperature and lower concentration of reactants done
clear
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question_answer18)
Given reaction is \[2{{X}_{(gas)}}+{{Y}_{(gas)}}\] ⇌ \[2{{Z}_{(gas)}}+80\,kcal\] Which combination of pressure and temperature gives the highest yield of Z at equilibrium [NCERT 1979]
A)
1000 atm and \[{{500}^{o}}C\] done
clear
B)
500 atm and \[{{500}^{o}}C\] done
clear
C)
1000 atm and \[{{100}^{o}}C\] done
clear
D)
500 atm and \[{{100}^{o}}C\] done
clear
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question_answer19)
Consider the reaction \[HC{{N}_{(aq)}}\] ⇌ \[H_{(aq)}^{+}+CN_{(aq)}^{-}\] . At equilibrium, the addition of \[CN_{(aq)}^{-}\] would [NCERT 1979]
A)
Reduce \[HC{{N}_{(aq)}}\] concentration done
clear
B)
Decrease the \[H_{(aq)}^{+}\] ion concentration done
clear
C)
Increase the equilibrium constant done
clear
D)
Decrease the equilibrium constant done
clear
View Solution play_arrow
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question_answer20)
In the gaseous equilibrium \[{{H}_{2}}{{X}_{2}}+\] heat ⇌ \[2HX\], the formation of \[HX\] will be favoured by [CPMT 1977]
A)
High pressure and low temperature done
clear
B)
High temperature and low pressure done
clear
C)
Low temperature and low pressure done
clear
D)
High temperature and high pressure done
clear
View Solution play_arrow
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question_answer21)
Raising the temperature of an equilibrium system [MP PMT 1987]
A)
Favours the exothermic reaction only done
clear
B)
Favours the endothermic reaction only done
clear
C)
Favours both the exothermic and endothermic reactions done
clear
D)
Favours neither the exothermic nor endothermic reactions done
clear
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question_answer22)
Reaction in which yield of product will increase with increase in pressure is [NCERT 1984]
A)
\[{{H}_{2(g)}}+{{I}_{2(g)}}\] ⇌ \[2H{{I}_{(g)}}\] done
clear
B)
\[{{H}_{2}}{{O}_{(g)}}+C{{O}_{(g)}}\] ⇌ \[C{{O}_{2(g)}}+{{H}_{2(g)}}\] done
clear
C)
\[{{H}_{2}}{{O}_{(g)}}+{{C}_{(s)}}\] ⇌ \[C{{O}_{(g)}}+{{H}_{2(g)}}\] done
clear
D)
\[C{{O}_{(g)}}+3{{H}_{2(g)}}\] ⇌ \[C{{H}_{4(g)}}+{{H}_{2}}{{O}_{(g)}}\] done
clear
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question_answer23)
In reaction \[{{N}_{2(g)}}+3{{H}_{2(g)}}\] ⇌ \[2N{{H}_{3(g)}};\,\Delta H=-93.6\,kJ\], the yield of ammonia does not increase when [CPMT 1988]
A)
Pressure is increased done
clear
B)
Temperature is lowered done
clear
C)
Pressure is lowered done
clear
D)
Volume of the reaction vessel is decreased done
clear
View Solution play_arrow
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question_answer24)
The equilibrium which remains uneffected by change in pressure of the reactants is [CPMT 1987; KCET 1991; EAMCET 1992; MP PET 1992, 95; MP PMT 1999]
A)
\[{{N}_{2(g)}}+{{O}_{2(g)}}\] ⇌ \[2N{{O}_{(g)}}\] done
clear
B)
\[2S{{O}_{2(g)}}+{{O}_{2(g)}}\] ⇌ \[2S{{O}_{3(g)}}\] done
clear
C)
\[2{{O}_{3(g)}}\]⇌ \[3{{O}_{2(g)}}\] done
clear
D)
\[2N{{O}_{2(g)}}\] ⇌ \[{{N}_{2}}{{O}_{4(g)}}\] done
clear
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question_answer25)
The endothermic reaction \[(M+N\]D\[P)\] is allowed to attain an equilibrium at \[{{25}^{o}}\]. Formation of \[P\] can be increased by [BHU 1981]
A)
Raising temperature done
clear
B)
Lowering temperature done
clear
C)
Keeping temperature constant done
clear
D)
Decreasing the concentration of \[M\] and \[N\] done
clear
View Solution play_arrow
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question_answer26)
According to Le-chatelier's principle, an increase in the temperature of the following reaction will \[{{N}_{2}}+{{O}_{2}}\]⇌\[2NO-43,200\,kcal\] [MP PMT 1985, 93]
A)
Increase the yield of \[NO\] done
clear
B)
Decrease the yield of \[NO\] done
clear
C)
Not effect the yield of \[NO\] done
clear
D)
Not help the reaction to proceed in forward direction done
clear
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question_answer27)
In the manufacture of \[N{{H}_{3}}\] by Haber's process, the condition which would give maximum yield is \[{{N}_{2}}+3{{H}_{2}}\]⇌ \[2N{{H}_{3}}+Q\,kcal\] [NCERT 1978; EAMCET 1980; MNR 1987; AFMC 1999; CPMT 1983, 84, 86, 94; MP PMT 1999]
A)
High temperature, high pressure and high concentrations of the reactants done
clear
B)
High temperature, low pressure and low concentrations of the reactants done
clear
C)
Low temperature and high pressure done
clear
D)
Low temperature, low pressure and low concentration of \[{{H}_{2}}\] done
clear
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question_answer28)
Suppose the reaction \[PC{{l}_{5(s)}}\]⇌ \[PC{{l}_{3(s)}}+C{{l}_{2(g)}}\] is in a closed vessel at equilibrium stage. What is the effect on equilibrium concentration of \[C{{l}_{2(g)}}\] by adding \[PC{{l}_{5}}\] at constant temperature [MP PMT 1992]
A)
Decreases done
clear
B)
Increases done
clear
C)
Unaffected done
clear
D)
Cannot be described without the value of \[{{K}_{p}}\] done
clear
View Solution play_arrow
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question_answer29)
In which of the following equilibrium reactions, the equilibrium would shift to the right, if total pressure is increased [KCET 1993]
A)
\[{{N}_{2}}+3{{H}_{2}}\]⇌ \[2N{{H}_{3}}\] done
clear
B)
\[{{H}_{2}}+{{I}_{2}}\]⇌ \[2HI\] done
clear
C)
\[{{H}_{2}}+C{{l}_{2}}\] ⇌ \[2HCl\] done
clear
D)
\[{{N}_{2}}{{O}_{4}}\]⇌ \[2NO\] done
clear
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question_answer30)
In which of the following gaseous equilibrium an increase in pressure will increase the yield of the products [EAMCET 1988]
A)
\[2HI\]⇌\[{{H}_{2}}+{{I}_{2}}\] done
clear
B)
\[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\] done
clear
C)
\[{{H}_{2}}+B{{r}_{2}}\]⇌\[2HBr\] done
clear
D)
\[{{H}_{2}}O+CO\]⇌\[{{H}_{2}}+C{{O}_{2}}\] done
clear
View Solution play_arrow
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question_answer31)
In the reaction \[A(g)+B(g)\] ⇌ \[C(g)\], the backward reaction is favoured by [EAMCET 1986]
A)
Decrease of pressure done
clear
B)
Increase of pressure done
clear
C)
Either of the two done
clear
D)
None of the two done
clear
View Solution play_arrow
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question_answer32)
The formation of \[N{{O}_{2}}\] in the reaction \[2NO+{{O}_{2}}\]⇌\[2N{{O}_{2}}\]+ heat is favoured by [Rookee Qualifying 1998]
A)
Low pressure done
clear
B)
High pressure done
clear
C)
Low temperature done
clear
D)
Reduction in the mass of done
clear
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question_answer33)
For the reaction \[PC{{l}_{5}}(g)\]⇌ \[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\], the forward reaction at constant temperature is favoured by [IIT 1991; AMU 2001]
A)
Introducing an inert gas at constant volume done
clear
B)
Introducing chlorine gas at constant volume done
clear
C)
Introducing an inert gas at constant pressure done
clear
D)
Decreasing the volume of the container done
clear
View Solution play_arrow
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question_answer34)
Which of the following conditions is favourable for the production of ammonia by Haber's process [MP PET 1994]
A)
High concentration of reactants done
clear
B)
Low temperature and high pressure done
clear
C)
Continuous removal of ammonia done
clear
D)
All of these done
clear
View Solution play_arrow
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question_answer35)
According to Le-chatelier's principle, which of the following factors influence a chemical system [MP PMT 1996]
A)
Concentration only done
clear
B)
Pressure only done
clear
C)
Temperature only done
clear
D)
Concentration, pressure and temperature done
clear
View Solution play_arrow
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question_answer36)
If pressure increases then its effect on given equilibrium \[C(s)+{{H}_{2}}O(g)\]⇌\[CO(g)+{{H}_{2}}(g)\] it is satisfied in [BCECE 2005]
A)
Forward direction done
clear
B)
Backward direction done
clear
C)
No effect done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer37)
The exothermic formation of \[Cl{{F}_{3}}\] is represented by the equation \[C{{l}_{2(g)}}+3{{F}_{2(g)}}\] ⇌ \[2Cl{{F}_{3(g)}}\]; \[\Delta H=-329\,kJ\] Which of the following will increase the quantity of \[Cl{{F}_{3}}\] in an equilibrium mixture of \[C{{l}_{2}},\,{{F}_{2}}\] and \[Cl{{F}_{3}}\] [AIEEE 2005]
A)
Increasing the temperature done
clear
B)
Removing \[C{{l}_{2}}\] done
clear
C)
Increasing the volume of the container done
clear
D)
Adding \[{{F}_{2}}\] done
clear
View Solution play_arrow
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question_answer38)
What would happen to a reversible reaction at equilibrium when an inert gas is added while the pressure remains unchanged [MP PMT 1997]
A)
More of the product will be formed done
clear
B)
Less of the product will be formed done
clear
C)
More of the reactants will be formed done
clear
D)
It remains unaffected done
clear
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question_answer39)
Formation of \[S{{O}_{3}}\] takes place according to the reaction \[2S{{O}_{2}}+{{O}_{2}}\]D \[2S{{O}_{3}};\Delta H=-45.2\,kcal\] Which of the following factors favours the formation of \[S{{O}_{3}}\] [MP PET/PMT 1998]
A)
Increase in temperature done
clear
B)
Increase in pressure done
clear
C)
Removal of oxygen done
clear
D)
Increase in volume done
clear
View Solution play_arrow
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question_answer40)
For the chemical reaction \[3X(g)+Y(g)\]⇌\[{{X}_{3}}Y(g)\], the amount of \[{{X}_{3}}Y\] at equilibrium is affected by [IIT 1999]
A)
Temperature and pressure done
clear
B)
Temperature only done
clear
C)
Pressure only done
clear
D)
Temperature, pressure and catalyst done
clear
View Solution play_arrow
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question_answer41)
In \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] reversible reaction, increase in pressure will favour [DPMT 1996]
A)
Reaction in forward direction done
clear
B)
Reaction in reverse direction done
clear
C)
Will not exert any effect done
clear
D)
In backward and forward direction equally done
clear
View Solution play_arrow
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question_answer42)
In the reaction \[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\], the product increases on [Bihar MEE 1996]
A)
Increasing temperature done
clear
B)
Increasing pressure done
clear
C)
Increasing temperature and pressure both done
clear
D)
Decreasing temperature and pressure both done
clear
E)
None of these done
clear
View Solution play_arrow
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question_answer43)
In which of the following system, doubling the volume of the container cause a shift to the right [AIIMS 1996]
A)
\[{{H}_{2}}(g)+C{{l}_{2}}(g)=2HCl(g)\] done
clear
B)
\[2CO(g)+{{O}_{2}}(g)=2C{{O}_{2}}(g)\] done
clear
C)
\[{{N}_{2}}(g)+3{{H}_{2}}(g)=2N{{H}_{3}}(g)\] done
clear
D)
\[PC{{l}_{5}}(g)\]⇌\[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] done
clear
View Solution play_arrow
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question_answer44)
Which of the following information can be obtained on the basis of Le-chatelier's principle [AIIMS 1998; Pb. PMT 1999; BHU 2000; DPMT 2004]
A)
Entropy change in a reaction done
clear
B)
Dissociation constant of a weak acid done
clear
C)
Equilibrium constant of a chemical reaction done
clear
D)
Shift in equilibrium position on changing value of a constant done
clear
View Solution play_arrow
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question_answer45)
The equilibrium \[2S{{O}_{2(g)}}+{{O}_{2(g)}}\]⇌\[2S{{O}_{3(g)}}\] shifts forward, if [CPMT 1988]
A)
A catalyst is used done
clear
B)
An adsorbent is used to remove \[S{{O}_{3}}\] as soon as it is formed done
clear
C)
Low pressure done
clear
D)
Small amounts of reactants are used done
clear
View Solution play_arrow
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question_answer46)
The equilibrium \[S{{O}_{2}}C{{l}_{2(g)}}\]⇌\[S{{O}_{2(g)}}+C{{l}_{2(g)}}\] is attained at 25°C in a closed container and an inert gas helium is introduced which of the following statement is correct [MP PMT 2000]
A)
More chlorine is formed done
clear
B)
Concentration of \[S{{O}_{2}}\] is reduced done
clear
C)
More \[S{{O}_{2}}C{{l}_{2}}\] is formed done
clear
D)
Concentration of \[S{{O}_{2}}C{{l}_{2}},\,S{{O}_{2}}\] and \[C{{l}_{2}}\] does not change done
clear
View Solution play_arrow
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question_answer47)
Which of the following equilibria will shift to right side on increasing the temperature [MP PMT 2000]
A)
\[C{{O}_{(g)}}+{{H}_{2}}{{O}_{(g)}}\]⇌\[C{{O}_{2}}_{(g)}+{{H}_{2}}_{(g)}\] done
clear
B)
\[2S{{O}_{2}}_{(g)}+{{O}_{2}}_{(g)}\]⇌\[2S{{O}_{3}}_{(g)}\] done
clear
C)
\[{{H}_{2}}{{O}_{(g)}}\]⇌\[{{H}_{2}}_{(g)}+\frac{1}{2}{{({{O}_{2}})}_{(g)}}\] done
clear
D)
\[4HC{{l}_{(g)}}+{{O}_{2}}_{(g)}\]⇌\[2{{H}_{2}}{{O}_{(g)}}+2C{{l}_{2}}_{(g)}\] done
clear
View Solution play_arrow
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question_answer48)
Sodium sulphate dissolves in water with evolution of heat. Consider a saturated solution of sodium sulphate. If the temperature is raised, then according to Le-Chatelier principle [MP PET 2000]
A)
More solid will dissolve done
clear
B)
Some solid will precipitate out from the solution done
clear
C)
The solution will become supersaturated done
clear
D)
Solution concentration will remain unchanged done
clear
View Solution play_arrow
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question_answer49)
Consider the equilibrium \[{{N}_{2}}(g)+3{{H}_{2}}(g)\]⇌\[2N{{H}_{3}}(g)\]; \[\Delta \]H = ? 93.6 KJ. The maximum yield of ammonia is obtained by [UPSEAT 1999; AMU 2000]
A)
Decrease of temp. and increase of pressure done
clear
B)
Increase of temp. and decrease of pressure done
clear
C)
Decrease of both the temp. and pressure done
clear
D)
Increase of both the temp. and pressure done
clear
View Solution play_arrow
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question_answer50)
In the equilibrium \[AB\]⇌\[A+B\]; if the equilibrium concentration of A is doubled, the equilibrium concentration of B would become: [AMU 2000]
A)
Twice done
clear
B)
Half done
clear
C)
1/4th done
clear
D)
1/8th done
clear
View Solution play_arrow
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question_answer51)
Le-Chatelier?s principle is applicable only to a [MP PET/PMT 1988; KCET 1999; AFMC 2000; Pb. CET 2002]
A)
System in equilibrium done
clear
B)
Irreversible reaction done
clear
C)
Homogeneous reaction done
clear
D)
Heterogeneous reaction done
clear
View Solution play_arrow
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question_answer52)
In a vessel containing \[S{{O}_{3}},\,S{{O}_{2}}\] and \[{{O}_{2}}\] at equilibrium, some helium gas is introduced so that the total pressure increases while temperature and volume remain constant. According to Le?Chatelier principle the dissociation of \[S{{O}_{3}}\] [UPSEAT 2000]
A)
Increases done
clear
B)
Decreases done
clear
C)
Remains unaltered done
clear
D)
Changes unpredictably done
clear
View Solution play_arrow
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question_answer53)
\[{{H}_{2(g)}}+{{I}_{2(g)}}\]⇌\[2H{{I}_{(g)}}\,\,\,\Delta H=+q\]cal, then formation of HI: [AMU 2000]
A)
Is favoured by lowering the temperature done
clear
B)
Is favoured by increasing the pressure done
clear
C)
Is unaffected by change in pressure done
clear
D)
Is unaffected by change in temperature done
clear
View Solution play_arrow
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question_answer54)
In which of the following equilibrium systems is the rate of the backward reaction favoured by increase of pressure [KCET 2001]
A)
\[PC{{l}_{5}}\]⇌\[PC{{l}_{3}}+C{{l}_{2}}\] done
clear
B)
\[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\] done
clear
C)
\[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] done
clear
D)
\[{{N}_{2}}+{{O}_{2}}\]⇌\[2NO\] done
clear
View Solution play_arrow
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question_answer55)
Which of the following equilibrium is not shifted by increase in the pressure [MP PMT 2001]
A)
\[{{H}_{2}}_{(g)}+{{I}_{2}}_{(g)}\]⇌\[2H{{I}_{(g)}}\] done
clear
B)
\[{{N}_{2(g)}}+3{{H}_{2(g)}}\]⇌\[2N{{H}_{3}}_{(g)}\] done
clear
C)
\[2C{{O}_{(g)}}+{{O}_{2}}_{(g)}\]⇌\[2C{{O}_{2}}_{(g)}\] done
clear
D)
\[2{{C}_{(S)}}+{{O}_{2(g)}}\]⇌\[2C{{O}_{(g)}}\] done
clear
View Solution play_arrow
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question_answer56)
According to Le?Chatelier?s principal adding heat to a solid and liquid in equilibrium with endothermic nature will cause the [JIPMER 2000; MP PET 2001]
A)
Temperature to rise done
clear
B)
Temperature to fall done
clear
C)
Amount of solid to decrease done
clear
D)
Amount of liquid to decrease done
clear
View Solution play_arrow
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question_answer57)
On addition of an inert gas at constant volume to the reaction \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\]at equilibrium [Pb. PMT 2001]
A)
The reaction remains unaffected done
clear
B)
Forward reaction is favoured done
clear
C)
The reaction halts done
clear
D)
Backward reaction is favoured done
clear
View Solution play_arrow
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question_answer58)
Le-Chatelier principle is not applicable to [MH CET 2001]
A)
\[{{H}_{2(g)}}+{{I}_{2(g)}}\] ⇌\[2H{{I}_{(g)}}\] done
clear
B)
\[F{{e}_{(S)}}+{{S}_{(S)}}\] ⇌\[Fe{{S}_{(S)}}\] done
clear
C)
\[{{N}_{2(g)}}+3{{H}_{2(g)}}\]⇌\[2N{{H}_{3(g)}}\] done
clear
D)
\[{{N}_{2(g)}}+{{O}_{2(g)}}\]⇌\[2N{{O}_{(g)}}\] done
clear
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question_answer59)
For the reaction: A + B + Q ⇌ C + D, if the temperature is increased, then concentration of the products will [AFMC 2001]
A)
Increase done
clear
B)
Decrease done
clear
C)
Remain same done
clear
D)
Become Zero done
clear
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question_answer60)
\[{{H}_{2(g)}}\]+ \[{{I}_{2(g)}}\] ⇌\[2H{{I}_{(g)}}\] In this reaction when pressure increases, the reaction direction [RPMT 2002]
A)
Does not change done
clear
B)
Forward done
clear
C)
Backward done
clear
D)
Decrease done
clear
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question_answer61)
The rate of reaction of which of the following is not affected by pressure [MP PMT 2002]
A)
\[PC{{l}_{3}}+C{{l}_{2}}\]⇌\[PC{{l}_{5}}\] done
clear
B)
\[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] done
clear
C)
\[{{N}_{2}}+{{O}_{2}}\]⇌ 2NO done
clear
D)
\[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\] done
clear
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question_answer62)
In the equilibrium N2 + 3H2 ⇌ 2NH3 + 22 kcal, the formation of ammonia is favoured by [MP PET 2000, 02]
A)
Increasing the pressure done
clear
B)
Increasing the temperature done
clear
C)
Decreasing the pressure done
clear
D)
Adding ammonia done
clear
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question_answer63)
The reaction \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\]; \[\Delta H\] = ? ve is favoured by [CPMT 2002; Pb. PMT 2001]
A)
Low temperature, low pressure done
clear
B)
Low temperature, high pressure done
clear
C)
High temperature, high pressure done
clear
D)
High temperature, low pressure done
clear
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question_answer64)
Which of the following will favour the reverse reaction in a chemical equilibrium [Kerala (Med.) 2002]
A)
Increasing the concentration of the reactants done
clear
B)
Removal of at least one of the products at regular intervals done
clear
C)
Increasing the concentration of one or more of the products done
clear
D)
Increasing the pressure done
clear
E)
None of these done
clear
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question_answer65)
Under what conditions of temperature and pressure the formation of atomic hydrogen from molecular hydrogen will be favoured most [UPSEAT 2000, 01, 02]
A)
High temperature and high pressure done
clear
B)
Low temperature and low pressure done
clear
C)
High temperature and low pressure done
clear
D)
Low temperature and high pressure done
clear
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question_answer66)
The formation of nitric oxide by contact process \[{{N}_{2}}+{{O}_{2}}\] ⇌ 2NO. \[\Delta \]H = 43.200 kcal is favoured by [AMU 2002]
A)
Low temperature and low pressure done
clear
B)
Low temperature and high pressure done
clear
C)
High temperature and high pressure done
clear
D)
High temperature and excess reactants concentration done
clear
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question_answer67)
The chemical reaction: \[Ba{{O}_{2(S)}}\]⇌\[Ba{{O}_{(s)}}\]\[+{{O}_{2(g)}}\]? \[\Delta \]H = + ve. In equilibrium condition, pressure of O2 depends upon [CBSE PMT 2002]
A)
Increase mass of BaO done
clear
B)
Increase mass of BaO2 done
clear
C)
Increase in temperature done
clear
D)
Increase mass of BaO2 and BaO both done
clear
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question_answer68)
The yield of product in the reaction \[{{A}_{2(g)}}\]+ \[2{{B}_{\left( g \right)}}\]⇌ \[{{C}_{(g)}}\]+ Q.kJ. would be high at [UPSEAT 2002]
A)
High temperature and high pressure done
clear
B)
High temperature and low pressure done
clear
C)
Low temperature and high pressure done
clear
D)
Low temperature and low pressure done
clear
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question_answer69)
Which reaction is not effected by change in pressure [UPSEAT 2003]
A)
\[{{H}_{2}}+{{I}_{2}}\]⇌\[2HI\] done
clear
B)
\[2C+{{O}_{2}}\]⇌ 2CO done
clear
C)
\[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] done
clear
D)
\[PC{{l}_{5}}\]⇌\[PC{{l}_{3}}+C{{l}_{2}}\] done
clear
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question_answer70)
The gaseous reaction A + B ⇌ 2C + D; + Q is most favoured at [Karnataka CET 2003]
A)
Low temperature and high pressure done
clear
B)
High temperature and high pressure done
clear
C)
High temperature and low pressure done
clear
D)
Low temperature and low pressure done
clear
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question_answer71)
For a reaction if \[{{K}_{p}}>{{K}_{c}}\], the forward reaction is favoured by [RPET 2003]
A)
Low pressure done
clear
B)
High pressure done
clear
C)
High temperature done
clear
D)
Low temperature done
clear
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question_answer72)
\[{{A}_{2(g)}}+{{B}_{2(g)}}\]⇌\[2A{{B}_{(g)}}\]; \[\Delta H=+ve\] [BHU 2003]
A)
Unaffected by pressure done
clear
B)
It occurs at 1000 pressure done
clear
C)
It occurs at high temperature done
clear
D)
It occurs at high pressure and high temperature done
clear
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question_answer73)
Consider the reaction equilibrium, \[2S{{O}_{2(g)}}\]+\[{{O}_{2(g)}}\]⇌\[2S{{O}_{3(g)}}\]; \[\Delta H{}^\circ \]= ?198kJ. On the basis of Le-Chatelier?s principle, the condition favorable for the forward reaction is [AIEEE 2003]
A)
Lowering of temperature as well as pressure done
clear
B)
Increasing temperature as well as pressure done
clear
C)
Lowering the temperature and increasing the pressure done
clear
D)
Any value of temperature and pressure done
clear
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