11242 + Mcqs in Chemistry Page 84 McqOptions

4151.	Le-Chatelier?s principle is applicable only to a [MP PET/PMT 1988; KCET 1999; AFMC 2000; Pb. CET 2002]
A.	System in equilibrium
B.	Irreversible reaction
C.	Homogeneous reaction
D.	Heterogeneous reaction
Answer» B. Irreversible reaction

Discussion

4152.	Le-chatelier principle is applicable
A.	Both for physical and chemical equilibrium
B.	Only for chemical equilibrium
C.	Only for physical equilibrium
D.	Neither for B nor for C
Answer» B. Only for chemical equilibrium

Discussion

4153.	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
B.	Increase of temp. and decrease of pressure
C.	Decrease of both the temp. and pressure
D.	Increase of both the temp. and pressure
Answer» B. Increase of temp. and decrease of pressure

Discussion

4154.	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
B.	Some solid will precipitate out from the solution
C.	The solution will become supersaturated
D.	Solution concentration will remain unchanged
Answer» C. The solution will become supersaturated

Discussion

4155.	Which of the following equilibria will shift to right side on increasing the temperature [MP PMT 2000]
A.	\[C{{O}_{(g)}}+{{H}_{2}}{{O}_{(g)}}\]⇌\[C{{O}_{2}}_{(g)}+{{H}_{2}}_{(g)}\]
B.	\[2S{{O}_{2}}_{(g)}+{{O}_{2}}_{(g)}\]⇌\[2S{{O}_{3}}_{(g)}\]
C.	\[{{H}_{2}}{{O}_{(g)}}\]⇌\[{{H}_{2}}_{(g)}+\frac{1}{2}{{({{O}_{2}})}_{(g)}}\]
D.	\[4HC{{l}_{(g)}}+{{O}_{2}}_{(g)}\]⇌\[2{{H}_{2}}{{O}_{(g)}}+2C{{l}_{2}}_{(g)}\]
Answer» D. \[4HC{{l}_{(g)}}+{{O}_{2}}_{(g)}\]⇌\[2{{H}_{2}}{{O}_{(g)}}+2C{{l}_{2}}_{(g)}\]

Discussion

4156.	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
B.	Concentration of \[S{{O}_{2}}\] is reduced
C.	More \[S{{O}_{2}}C{{l}_{2}}\] is formed
D.	Concentration of \[S{{O}_{2}}C{{l}_{2}},\,S{{O}_{2}}\] and \[C{{l}_{2}}\] does not change
Answer» E.

Discussion

4157.	The equilibrium \[2S{{O}_{2(g)}}+{{O}_{2(g)}}\]⇌\[2S{{O}_{3(g)}}\] shifts forward, if [CPMT 1988]
A.	A catalyst is used
B.	An adsorbent is used to remove \[S{{O}_{3}}\] as soon as it is formed
C.	Low pressure
D.	Small amounts of reactants are used
Answer» C. Low pressure

Discussion

4158.	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
B.	Dissociation constant of a weak acid
C.	Equilibrium constant of a chemical reaction
D.	Shift in equilibrium position on changing value of a constant
Answer» E.

Discussion

4159.	In which of the following system, doubling the volume of the container cause a shift to the right [AIIMS 1996]
A.	\[{{H}_{2}}(g)+C{{l}_{2}}(g)=2HCl(g)\]
B.	\[2CO(g)+{{O}_{2}}(g)=2C{{O}_{2}}(g)\]
C.	\[{{N}_{2}}(g)+3{{H}_{2}}(g)=2N{{H}_{3}}(g)\]
D.	\[PC{{l}_{5}}(g)\]⇌\[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\]
Answer» E.

Discussion

4160.	In the reaction \[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\], the product increases on [Bihar MEE 1996]
A.	Increasing temperature
B.	Increasing pressure
C.	Increasing temperature and pressure both
D.	Decreasing temperature and pressure both
E.	None of these
Answer» C. Increasing temperature and pressure both

Discussion

4161.	In \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] reversible reaction, increase in pressure will favour [DPMT 1996]
A.	Reaction in forward direction
B.	Reaction in reverse direction
C.	Will not exert any effect
D.	In backward and forward direction equally
Answer» B. Reaction in reverse direction

Discussion

4162.	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
B.	Temperature only
C.	Pressure only
D.	Temperature, pressure and catalyst
Answer» B. Temperature only

Discussion

4163.	Which of the following reactions proceed at low pressure [MP PET 1985; CPMT 1984; MP PMT 1995; RPMT 1997]
A.	\[{{N}_{2}}+3{{H}_{2}}\] ⇌ \[2N{{H}_{3}}\]
B.	\[{{H}_{2}}+{{I}_{2}}\] ⇌ \[2HI\]
C.	\[PC{{l}_{5}}\] ⇌ \[PC{{l}_{3}}+C{{l}_{2}}\]
D.	\[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO\]
Answer» D. \[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO\]

Discussion

4164.	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
B.	Increase in pressure
C.	Removal of oxygen
D.	Increase in volume
Answer» C. Removal of oxygen

Discussion

4165.	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
B.	Less of the product will be formed
C.	More of the reactants will be formed
D.	It remains unaffected
Answer» E.

Discussion

4166.	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
B.	Removing \[C{{l}_{2}}\]
C.	Increasing the volume of the container
D.	Adding \[{{F}_{2}}\]
Answer» E.

Discussion

4167.	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
B.	Backward direction
C.	No effect
D.	None of these
Answer» C. No effect

Discussion

4168.	According to Le-chatelier's principle, which of the following factors influence a chemical system [MP PMT 1996]
A.	Concentration only
B.	Pressure only
C.	Temperature only
D.	Concentration, pressure and temperature
Answer» E.

Discussion

4169.	Which of the following conditions is favourable for the production of ammonia by Haber's process [MP PET 1994]
A.	High concentration of reactants
B.	Low temperature and high pressure
C.	Continuous removal of ammonia
D.	All of these
Answer» E.

Discussion

4170.	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
B.	Introducing chlorine gas at constant volume
C.	Introducing an inert gas at constant pressure
D.	Decreasing the volume of the container
Answer» D. Decreasing the volume of the container

Discussion

4171.	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
B.	High pressure
C.	Low temperature
D.	Reduction in the mass of
Answer» C. Low temperature

Discussion

4172.	A reversible reaction is in equilibrium. If a factor is changed which affect it, then
A.	The speed of forward and backward reaction increases
B.	The speed of forward and backward reaction decreases
C.	Only the speed of that reaction increases which nullifies the factor causing increase of speed
D.	No difference
Answer» D. No difference

Discussion

4173.	In which of the following gaseous equilibrium an increase in pressure will increase the yield of the products [EAMCET 1988]
A.	\[2HI\]⇌\[{{H}_{2}}+{{I}_{2}}\]
B.	\[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\]
C.	\[{{H}_{2}}+B{{r}_{2}}\]⇌\[2HBr\]
D.	\[{{H}_{2}}O+CO\]⇌\[{{H}_{2}}+C{{O}_{2}}\]
Answer» C. \[{{H}_{2}}+B{{r}_{2}}\]⇌\[2HBr\]

Discussion

4174.	In which of the following equilibrium reactions, the equilibrium would shift to the right, if total pressure is increased [KCET 1993]
A.	\[{{N}_{2}}+3{{H}_{2}}\]⇌ \[2N{{H}_{3}}\]
B.	\[{{H}_{2}}+{{I}_{2}}\]⇌ \[2HI\]
C.	\[{{H}_{2}}+C{{l}_{2}}\] ⇌ \[2HCl\]
D.	\[{{N}_{2}}{{O}_{4}}\]⇌ \[2NO\]
Answer» B. \[{{H}_{2}}+{{I}_{2}}\]⇌ \[2HI\]

Discussion

4175.	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
B.	Increases
C.	Unaffected
D.	Cannot be described without the value of \[{{K}_{p}}\]
Answer» C. Unaffected

Discussion

4176.	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
B.	Lowering temperature
C.	Keeping temperature constant
D.	Decreasing the concentration of \[M\] and \[N\]
Answer» B. Lowering temperature

Discussion

4177.	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
B.	High temperature, low pressure and low concentrations of the reactants
C.	Low temperature and high pressure
D.	Low temperature, low pressure and low concentration of \[{{H}_{2}}\]
Answer» D. Low temperature, low pressure and low concentration of \[{{H}_{2}}\]

Discussion

4178.	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 \[NO\]
B.	Decrease the yield of \[NO\]
C.	Not effect the yield of \[NO\]
D.	Not help the reaction to proceed in forward direction
Answer» B. Decrease the yield of \[NO\]

Discussion

4179.	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.	\[{{N}_{2(g)}}+{{O}_{2(g)}}\] ⇌ \[2N{{O}_{(g)}}\]
B.	\[2S{{O}_{2(g)}}+{{O}_{2(g)}}\] ⇌ \[2S{{O}_{3(g)}}\]
C.	\[2{{O}_{3(g)}}\]⇌ \[3{{O}_{2(g)}}\]
D.	\[2N{{O}_{2(g)}}\] ⇌ \[{{N}_{2}}{{O}_{4(g)}}\]
Answer» B. \[2S{{O}_{2(g)}}+{{O}_{2(g)}}\] ⇌ \[2S{{O}_{3(g)}}\]

Discussion

4180.	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
B.	Temperature is lowered
C.	Pressure is lowered
D.	Volume of the reaction vessel is decreased
Answer» D. Volume of the reaction vessel is decreased

Discussion

4181.	Reaction in which yield of product will increase with increase in pressure is [NCERT 1984]
A.	\[{{H}_{2(g)}}+{{I}_{2(g)}}\] ⇌ \[2H{{I}_{(g)}}\]
B.	\[{{H}_{2}}{{O}_{(g)}}+C{{O}_{(g)}}\] ⇌ \[C{{O}_{2(g)}}+{{H}_{2(g)}}\]
C.	\[{{H}_{2}}{{O}_{(g)}}+{{C}_{(s)}}\] ⇌ \[C{{O}_{(g)}}+{{H}_{2(g)}}\]
D.	\[C{{O}_{(g)}}+3{{H}_{2(g)}}\] ⇌ \[C{{H}_{4(g)}}+{{H}_{2}}{{O}_{(g)}}\]
Answer» E.

Discussion

4182.	Raising the temperature of an equilibrium system [MP PMT 1987]
A.	Favours the exothermic reaction only
B.	Favours the endothermic reaction only
C.	Favours both the exothermic and endothermic reactions
D.	Favours neither the exothermic nor endothermic reactions
Answer» C. Favours both the exothermic and endothermic reactions

Discussion

4183.	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
B.	High temperature and low pressure
C.	Low temperature and low pressure
D.	High temperature and high pressure
Answer» C. Low temperature and low pressure

Discussion

4184.	\[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO-Q\,cals\] In the above reaction which is the essential condition for the higher production of \[NO\] [CPMT 1971, 89; MP PMT 1985]
A.	High temperature
B.	High pressure
C.	Low temperature
D.	Low pressure
Answer» B. High pressure

Discussion

4185.	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
B.	Decrease the \[H_{(aq)}^{+}\] ion concentration
C.	Increase the equilibrium constant
D.	Decrease the equilibrium constant
Answer» C. Increase the equilibrium constant

Discussion

4186.	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 \[{{500}^{o}}C\]
B.	500 atm and \[{{500}^{o}}C\]
C.	1000 atm and \[{{100}^{o}}C\]
D.	500 atm and \[{{100}^{o}}C\]
Answer» D. 500 atm and \[{{100}^{o}}C\]

Discussion

4187.	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
B.	Catalyst, optimum temperature and lower concentration of reactants
C.	Catalyst, high temperature and higher concentration of reactants
D.	Catalyst, low temperature and lower concentration of reactants
Answer» B. Catalyst, optimum temperature and lower concentration of reactants

Discussion

4188.	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
B.	Removal of at least one of the product at regular time intervals
C.	Increase in the concentration of one or more products
D.	None of these
Answer» D. None of these

Discussion

4189.	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 \[{{N}_{2}}{{O}_{4}}\]
B.	Favour the decomposition of \[{{N}_{2}}{{O}_{4}}\]
C.	Not alter the equilibrium
D.	Stop the reaction
Answer» C. Not alter the equilibrium

Discussion

4190.	The effect of increasing the pressure on the equilibrium \[2A+3B\]⇌\[3A+2B\] is [EAMCET 1980; MP PMT 1991]
A.	Forward reaction is favoured
B.	Backward reaction is favoured
C.	No effect
D.	None of the above
Answer» D. None of the above

Discussion

4191.	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
B.	By reducing temperature
C.	By removing some hydrogen
D.	By adding some \[{{C}_{2}}{{H}_{6}}\]
Answer» C. By removing some hydrogen

Discussion

4192.	According to Le-chatelier principle, if heat is given to solid-liquid system, then [MNR 1990]
A.	Quantity of solid will reduce
B.	Quantity of liquid will reduce
C.	Increase in temperature
D.	Decrease in temperature
Answer» B. Quantity of liquid will reduce

Discussion

4193.	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
B.	At high temperature and low pressure
C.	At low temperature and high pressure
D.	At low temperature and low pressure
Answer» D. At low temperature and low pressure

Discussion

4194.	Select the correct statement from the following [MP PMT 1985]
A.	Equilibrium constant changes with addition of catalyst
B.	Catalyst increases the rate of forward reaction
C.	The ratio of mixture at equilibrium is not changed by catalyst
D.	Catalyst are active only in solution
Answer» D. Catalyst are active only in solution

Discussion

4195.	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
B.	Le-chatelier's principle
C.	Ostwald's rule
D.	Hess's law of constant heat summation
Answer» C. Ostwald's rule

Discussion

4196.	Different propartions of oxygen in the various oxides of nitrogen prove the [MP PMT 1985]
A.	Equivalent proportion
B.	Multiple proportion
C.	Constant proportion
D.	Conservation of matter
Answer» C. Constant proportion

Discussion

4197.	Two elements X and Y have atomic weights of 14 and 16. They form a series of compounds A, B, C, D and E in which the same amount of element X, Y is present in the ratio 1 : 2 : 3 : 4 : 5. If the compound A has 28 parts by weight of X and 16 parts by weight of Y, then the compound of C will have 28 parts weight of X and [NCERT 1971]
A.	32 parts by weight of Y
B.	48 parts by weight of Y
C.	64 parts by weight of Y
D.	80 parts by weight of Y
Answer» C. 64 parts by weight of Y

Discussion

4198.	Chemical equation is balanced according to the law of [AMU 1984]
A.	Multiple proportion
B.	Reciprocal proportion
C.	Conservation of mass
D.	Definite proportions
Answer» D. Definite proportions

Discussion

4199.	Avogadro number is
A.	Number of atoms in one gram of element
B.	Number of millilitres which one mole of a gaseous substances occupies at NTP
C.	Number of molecules present in one gram molecular mass of a substance
D.	All of these
Answer» D. All of these

Discussion

4200.	Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. The data illustrates [AMU 1983]
A.	Law of reciprocal proportions
B.	Law of constant proportions
C.	Law of multiple proportions
D.	Law of equivalent proportions
Answer» D. Law of equivalent proportions

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

Le-Chatelier?s principle is applicable only to a [MP PET/PMT 1988; KCET 1999; AFMC 2000; Pb. CET 2002]

Le-chatelier principle is applicable

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]

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]

Which of the following equilibria will shift to right side on increasing the temperature [MP PMT 2000]

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]

The equilibrium \[2S{{O}_{2(g)}}+{{O}_{2(g)}}\]⇌\[2S{{O}_{3(g)}}\] shifts forward, if [CPMT 1988]

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]

In which of the following system, doubling the volume of the container cause a shift to the right [AIIMS 1996]

In the reaction \[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\], the product increases on [Bihar MEE 1996]

In \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] reversible reaction, increase in pressure will favour [DPMT 1996]

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]

Which of the following reactions proceed at low pressure [MP PET 1985; CPMT 1984; MP PMT 1995; RPMT 1997]

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]

What would happen to a reversible reaction at equilibrium when an inert gas is added while the pressure remains unchanged [MP PMT 1997]

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]

According to Le-chatelier's principle, which of the following factors influence a chemical system [MP PMT 1996]

Which of the following conditions is favourable for the production of ammonia by Haber's process [MP PET 1994]

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]

The formation of \[N{{O}_{2}}\] in the reaction \[2NO+{{O}_{2}}\]⇌\[2N{{O}_{2}}\]+ heat is favoured by [Rookee Qualifying 1998]

A reversible reaction is in equilibrium. If a factor is changed which affect it, then

In which of the following gaseous equilibrium an increase in pressure will increase the yield of the products [EAMCET 1988]

In which of the following equilibrium reactions, the equilibrium would shift to the right, if total pressure is increased [KCET 1993]

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]

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]

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]

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]

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]

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]

Reaction in which yield of product will increase with increase in pressure is [NCERT 1984]

Raising the temperature of an equilibrium system [MP PMT 1987]

In the gaseous equilibrium \[{{H}_{2}}{{X}_{2}}+\] heat ⇌ \[2HX\], the formation of \[HX\] will be favoured by [CPMT 1977]

\[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO-Q\,cals\] In the above reaction which is the essential condition for the higher production of \[NO\] [CPMT 1971, 89; MP PMT 1985]

Consider the reaction \[HC{{N}_{(aq)}}\] ⇌ \[H_{(aq)}^{+}+CN_{(aq)}^{-}\] . At equilibrium, the addition of \[CN_{(aq)}^{-}\] would [NCERT 1979]

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]

In the formation of \[S{{O}_{3}}\] by contact process, the conditions used are [CPMT 1984]

Which of the following factors will favour the reverse reaction in a chemical equilibrium [AIIMS 1982]

For the equilibrium \[2N{{O}_{2}}(g)\] ⇌ \[{{N}_{2}}{{O}_{4}}(g)\] \[+14.6\,kcal\] the increase in temperature would [CPMT 1974, 78]

The effect of increasing the pressure on the equilibrium \[2A+3B\]⇌\[3A+2B\] is [EAMCET 1980; MP PMT 1991]

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]

According to Le-chatelier principle, if heat is given to solid-liquid system, then [MNR 1990]

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]

Select the correct statement from the following [MP PMT 1985]

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]

Different propartions of oxygen in the various oxides of nitrogen prove the [MP PMT 1985]

Chemical equation is balanced according to the law of [AMU 1984]

Avogadro number is

Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. The data illustrates [AMU 1983]