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## Equilibrium

### Chemistry

#### Previous Years Questions

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A compound 'X' is a weak acid and it exhibits colour change at pH close to the equivalence point during neutralization o...
JEE Main 2022 (Online) 29th July Evening Shift
$$200 \mathrm{~mL}$$ of $$0.01 \,\mathrm{M} \,\mathrm{HCl}$$ is mixed with $$400 \mathrm{~mL}$$ of $$0.01 \,\mathrm{M} \... JEE Main 2022 (Online) 29th July Evening Shift Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R Assertion A : Perm... JEE Main 2022 (Online) 28th July Evening Shift The plot of$$\mathrm{pH}$$-metric titration of weak base$$\mathrm{NH}_{4} \mathrm{OH}$$vs strong acid HCl looks like ... JEE Main 2022 (Online) 27th July Evening Shift Class XII students were asked to prepare one litre of buffer solution of$$\mathrm{pH} \,8.26$$by their Chemistry teach... JEE Main 2022 (Online) 26th July Evening Shift$$20 \mathrm{~mL}$$of$$0.1\, \mathrm{M} \,\mathrm{NH}_{4} \mathrm{OH}$$is mixed with$$40 \mathrm{~mL}$$of$$0.05 \m...
JEE Main 2022 (Online) 25th July Morning Shift
$$\Delta$$G$$^\circ$$ vs T plot for the formation of MgO, involving reaction 2Mg + O2 $$\to$$ 2MgO, will look like :...
JEE Main 2022 (Online) 30th June Morning Shift
For a reaction at equilibrium A(g) $$\rightleftharpoons$$ B(g) + $${1 \over 2}$$ C(g) the relation between dissociation ...
JEE Main 2022 (Online) 24th June Morning Shift
Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : The ...
JEE Main 2022 (Online) 25th June Evening Shift
The Ksp for bismuth sulphide (Bi2S3) is 1.08 $$\times$$ 10$$-$$73. The solubility of Bi2S3 in mol L$$-$$1 at 298 K is...
JEE Main 2022 (Online) 25th June Evening Shift
A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio of $${{[C{H_3}C{... JEE Main 2022 (Online) 28th June Evening Shift 4.0 moles of argon and 5.0 moles of PCl5 are introduced into an evacuated flask of 100 litre capacity at 610 K. The syst... JEE Main 2022 (Online) 29th June Evening Shift Given below are two statements.Statement I : In the titration between strong acid and weak base methyl orange is suitabl... JEE Main 2021 (Online) 26th August Morning Shift Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible react... JEE Main 2021 (Online) 27th July Morning Shift A solution is 0.1 M in Cl$$-$$and 0.001 M in CrO$$_4^{2 - }$$. Solid AgNO3 is gradually added to it. Assuming that the ... JEE Main 2021 (Online) 20th July Evening Shift Which of the following compound CANNOT act as a Lewis base? JEE Main 2021 (Online) 17th March Morning Shift The solubility of Ca(OH)2 in water is :[Given : The solubility product of Ca(OH)2 in water = 5.5$$\times$$10$$-$$6]... JEE Main 2021 (Online) 25th February Evening Shift The solubility of AgCN in a buffer solution of pH = 3 is x. The value of x is : [Assume : No cyano complex is formed; Ks... JEE Main 2021 (Online) 25th February Morning Slot The variation of equilibrium constant with temperature is given below : .tg {border-collapse:collapse;border-spacing:0... JEE Main 2020 (Online) 6th September Morning Slot For the reaction Fe2N(s) +$${3 \over 2}$$H2(g) ⇌ 2Fe(s) + NH3(g) JEE Main 2020 (Online) 6th September Morning Slot Arrange the following solutions in the decreasing order of pOH : (A) 0.01 M HCl (B) 0.01 M NaOH (C) 0.01 M CH3COONa (D) ... JEE Main 2020 (Online) 6th September Morning Slot Consider the following reaction: N2O4(g) ⇌ 2NO2(g);$$\Delta $$Ho = +58 kJ For each of the following cases (a, b), the d... JEE Main 2020 (Online) 5th September Morning Slot If the equilibrium constant for A ⇌ B + C is$$K_{eq}^{(1)}$$and that of B + C ⇌ P is$$K_{eq}^{(2)}$$, the equilibrium... JEE Main 2020 (Online) 4th September Evening Slot For the equilibrium A ⇌ B , the variation of the rate of the forward (a) and reverse (b) reaction with time is given by JEE Main 2020 (Online) 4th September Morning Slot 100 mL of 0.1 M HCl is taken in a beaker and to it 100 mL of 0.1 M NaOH is added in steps of 2 mL and the pH is continuo... JEE Main 2020 (Online) 3rd September Evening Slot While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required? JEE Main 2020 (Online) 2nd September Morning Slot An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of glucose are added... JEE Main 2020 (Online) 2nd September Morning Slot For the following Assertion and Reason, the correct option is Assertion (A): When Cu (II) and sulphide ions are mixed, t... JEE Main 2020 (Online) 2nd September Morning Slot The solubility product of Cr(OH)3 at 298 K is 6.0 × 10–31. The concentration of hydroxide ions in a saturated solution o... JEE Main 2020 (Online) 9th January Evening Slot In the figure shown below reactant A (represented by square) is in equilibrium with product B (represented by circle). T... JEE Main 2020 (Online) 9th January Evening Slot The Ksp for the following dissociation is 1.6 × 10–5$$PbC{l_{2(s)}} \leftrightharpoons Pb_{(aq)}^{2 + } + 2Cl_{(aq)}^ -...
JEE Main 2020 (Online) 9th January Morning Slot
For the following Assertion and Reason, the correct option is : Assertion : The pH of water increases with increase in t...
JEE Main 2020 (Online) 8th January Evening Slot
The stoichiometry and solubility product of a salt with the solubility curve given below is, respectively : ...
JEE Main 2020 (Online) 8th January Morning Slot
Oxidation number of potassium in K2O. K2O2 and KO2 respectively is :
JEE Main 2020 (Online) 7th January Morning Slot
The molar solubility of Cd(OH)2 is 1.84 × 10–5 M in water. The expected solubility of Cd(OH)2 in a buffer solution of p...
JEE Main 2019 (Online) 12th April Evening Slot
In which one of the following equilibria, Kp $$\ne$$ KC ?
JEE Main 2019 (Online) 12th April Evening Slot
What is the molar solubility of Al(OH)3 in 0.2 M NaOH solution ? Given that, solubility product of Al(OH)3 = 2.4 × 10–24...
JEE Main 2019 (Online) 12th April Morning Slot
The pH of a 0.02 M NH4Cl solution will be [given Kb (NH4OH) = 10–5 and log 2 = 0.301]...
JEE Main 2019 (Online) 10th April Evening Slot
For the reaction, 2SO2(g) + O2(g) = 2SO3(g), $$\Delta$$H = –57.2 kJ mol–1 and KC = 1.7 × 1016 Which of the following ...
JEE Main 2019 (Online) 10th April Evening Slot
Consider the following statements (a) The pH of a mixture containing 400 mL of 0.1 M H2SO4 and 400 mL of 0.1 M NaOH will...
JEE Main 2019 (Online) 10th April Morning Slot
For the following reactions, equilibrium constants are given : S(s) + O2(g) ⇋ SO2(g); K1 = 1052 2S(s) + 3O2(g) ⇋ 2SO3...
JEE Main 2019 (Online) 8th April Evening Slot
Two solids dissociate as follows – The total pressure when both the solids dissociated simultaneously is - ...
JEE Main 2019 (Online) 12th January Morning Slot
In a chemical reaction, the initial concentration of B was 1.5 times of the concentration of A, but the equilibrium co...
JEE Main 2019 (Online) 12th January Morning Slot
Given the equilibrium constant: KC of the reaction : Cu(s) + 2Ag+ (aq) $$\to$$ Cu2+ (aq) + 2Ag(s) is 10 $$\times$$...
JEE Main 2019 (Online) 11th January Evening Slot
For the equilibrium, 2H2O $$\rightleftharpoons$$ H3O+ + OH$$-$$, the value of $$\Delta$$Go at 298 K is approximately...
JEE Main 2019 (Online) 11th January Evening Slot
Consider the reaction N2(g) + 3H2(g)&nbsp;$$\rightleftharpoons$$ 2NH3(g) The equilibrium constant of the above reaction...
JEE Main 2019 (Online) 11th January Morning Slot
5.1 g NH4SH is introduced in 3.0 L evacuated flask at 327ºC. 30% of the solid NH4SH decomposed to NH3 and H2S as gases ....
JEE Main 2019 (Online) 10th January Evening Slot
If the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction Zn(s) + C...
JEE Main 2019 (Online) 9th January Evening Slot
The pH of rain water, is approximately :
JEE Main 2019 (Online) 9th January Evening Slot
20 mL of 0.1 M H2SO4 solution is added to 30 mL of of 0.2 M NH4OH solution. The pH of the resultant mixture is : [pkb of...
JEE Main 2019 (Online) 9th January Morning Slot
The gas phase reaction 2NO2(g) $$\to$$ N2O4(g) is an exothermic reaction. The decomposition of N2O4, in equilibrium ...
JEE Main 2018 (Online) 16th April Morning Slot
At a certain temperature in a $$5$$ $$L$$ vessel, 2 moles of carbon monoxide and 3 moles of chlorine were allowed to rea...
JEE Main 2018 (Online) 15th April Evening Slot
Following four solutions are prepared by mixing different volumes of NaOH and HCl of different concentrations, pH of whi...
JEE Main 2018 (Online) 15th April Evening Slot
Which of the following is a Lewis acid ?
JEE Main 2018 (Online) 15th April Morning Slot
In which of the following reactions, an increase in the volume of the container will favour the formation of products?
JEE Main 2018 (Online) 15th April Morning Slot
The minimum volume of water required to dissolve 0.1 g lead (II) chloride to get a saturated solution (Ksp of PbCl2 = 3...
JEE Main 2018 (Online) 15th April Morning Slot
Which of the following salts is the most basic in aqueous solution?
JEE Main 2018 (Offline)
Which of the following are Lewis acids?
JEE Main 2018 (Offline)
An aqueous solution contains 0.10 M H2S and 0.20 M HCl. If the equilibrium constants for the formation of HS– from H2S i...
JEE Main 2018 (Offline)
An aqueous solution contains an unknown concentration of Ba2+. When 50 mL of a 1 M solution of Na2SO4 is added, BaSO4 ju...
JEE Main 2018 (Offline)
50 mL of 0.2 M ammonia solution is treated with 25 mL of 0.2 M HCl. If pKb of ammonia solution is 4.75, the pH of the mi...
JEE Main 2017 (Online) 9th April Morning Slot
Additin of sodium hydroxide solution to a weak acid (HA)results in a buffer of pH 6. If ionition constant of HA is 10$$-... JEE Main 2017 (Online) 8th April Morning Slot pKa of a weak acid (HA) and pKb of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution i... JEE Main 2017 (Offline) A solid XY kept in an evacuated sealed container undergoes decomposition to form a mixture of gases X and Y at temperatu... JEE Main 2016 (Online) 10th April Morning Slot The plot shows the variation of −$$ln$$Kp versus temperature for the two reactions. M(s) +$${1 \over 2}$$O2(g)$$ \to...
JEE Main 2016 (Online) 9th April Morning Slot
For the reaction, A(g) + B(g) $$\to$$ C(g) + D(g), $$\Delta$$Ho and $$\Delta$$So are, respectively, − 29.8 kJ mol−...
JEE Main 2016 (Online) 9th April Morning Slot
The equilibrium constant at 298 K for a reaction A + B $$\leftrightharpoons$$ C + D is 100. If the initial concentration...
JEE Main 2016 (Offline)
The following reaction is performed at 298 K 2NO(g) + O2 (g) $$\leftrightharpoons$$ 2NO2 (g) The standard free energy ...
JEE Main 2015 (Offline)
The standard Gibbs energy change at 300 K for the reaction 2A $$\leftrightharpoons$$ B + C is 2494.2 J. At a given time,...
JEE Main 2015 (Offline)
For the reaction SO2 (g) + $${1 \over 2} O_2(g) \leftrightharpoons$$ SO3(g). if KP = KC(RT)x where the symbols have us...
JEE Main 2014 (Offline)
How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solu...
JEE Main 2013 (Offline)
The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionization constant, Ka of this acid is :...
AIEEE 2012
The equilibrium constant (KC) for the reaction N2(g) + O2(g) $$\to$$ 2NO(g) at temperature T is 4 $$\times$$ 10–4. The v...
AIEEE 2012
A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of grap...
AIEEE 2011
At 25°C, the solubility product of Mg(OH)2 is 1.0 $$\times$$ 10–11. At which pH, will Mg2+ ions start precipitating in t...
AIEEE 2010
In aqueous solution the ionization constants for carbonic acid are K1 = 4.2 x 10–7 and K2 = 4.8 x 10–11 Select the corre...
AIEEE 2010
Solubility product of silver bromide is 5.0 $$\times$$ 10–13. The quantity of potassium bromide (molar mass taken as 120...
AIEEE 2010
Three reactions involving $$H_2PO_4^−$$ are given below : (i) H3PO4 + H2O $$\to$$ H3O+ + $$H_2PO_4^−$$ (ii) $$H_2PO_4^−... AIEEE 2010 Solid Ba(NO3)2 is gradually dissolved in a 1.0$$\times$$10-4 M Na2CO3 solution. At what concentration of Ba2+ will a p... AIEEE 2009 The pKa of a weak acid, HA, is 4.80. The pKb of a weak base, BOH, is 4.78. The pH of an aqueous solution of the correspo... AIEEE 2008 For the following three reactions a, b and c, equilibrium constants are given: a. CO (g) + H2O (g)$$\leftrightharpoons...
AIEEE 2008
Four species are listed below i. $$HCO_3^−$$ ii. $$H_3O^+$$ iii. $$HSO_4^−$$ iv. $$HSO_3F$$ Which one of the following...
AIEEE 2008
The equilibrium constants KP1 and KP2 for the reactions X $$\leftrightharpoons$$ 2Y and Z $$\leftrightharpoons$$ P + Q,...
AIEEE 2008
In a sautrated solution of the sparingly soluble strong electrolyte AgIO3 (Molecular mass = 283) the equilibrium which s...
AIEEE 2007
The pKa of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which 50% of the acid is ionized is...
AIEEE 2007
The first and second dissociation constants of an acid H2A are 1.0 $$\times$$ 10−5 and 5.0 $$\times$$ 10−10 respectivel...
AIEEE 2007
Given the data at 25oC, Ag + I- $$\to$$ AgI + e- , Eo = 0.152 V Ag $$\to$$ Ag+ + e-, Eo = -0.800 V What is the value of...
AIEEE 2006
The equilibrium constant for the reaction SO3 (g) $$\leftrightharpoons$$ SO2 (g) + $$1 \over 2$$ O2 (g) is Kc = 4.9 $$... AIEEE 2006 Phosphorus pentachloride dissociates as follows, in a closed reaction vessel PCl5 (g)$$\leftrightharpoons$$PCl3 (g) + ... AIEEE 2006 An amount of solid NH4HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm. Pres... AIEEE 2005 What is the conjugate base of OH-? AIEEE 2005 Hydrogen ion concentration in mol / L in a solution of pH = 5.4 will be AIEEE 2005 For the reaction 2NO2 (g)$$\leftrightharpoons$$2NO (g) + O2 (g), (Kc = 1.8$$\times$$10-6 at 184oC) (R = 0.0831 kJ/(m... AIEEE 2005 The exothermic formation of ClF3 is represented by the equation: Cl2 (g) + 3F2 (g)$$\leftrightharpoons$$2ClF3 (g);$$...
AIEEE 2005
If $$\alpha$$ is the degree of dissociation of Na2SO4, the vant Hoff’s factor (i) used for calculating the molecular mas...
AIEEE 2005
The solubility product of a salt having general formula MX2, in water is: 4 $$\times$$ 10-12 . The concentration of M2+ ...
AIEEE 2005
The molar solubility (in ol L-1) of a sparingly soluble salt MX4 is "s". The corresponding solubility product is Ksp. 's...
AIEEE 2004
The equilibrium constant for the reaction N2(g) + O2(g) $$\leftrightharpoons$$ 2NO(g) at temperature T is 4 $$\times$$ 1...
AIEEE 2004
For the reaction, CO(g) + Cl2(g) $$\leftrightharpoons$$ COCl2(g) the $${{{K_p}} \over {{K_c}}}$$ is equal to...
AIEEE 2004
What is the equilibrium expression for the reaction P4 (s) + 5O2 $$\leftrightharpoons$$ P4O10 (s)?...
AIEEE 2004
The conjugate base of H2PO4- is
AIEEE 2004
When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
AIEEE 2003
For the reaction equilibrium N2O4 (g) $$\leftrightharpoons$$ 2NO2 (g) the concentrations of N2O4 and NO2 at equilibrium...
AIEEE 2003
Consider the reaction equilibrium 2 SO2 (g) + O2 (g) $$\leftrightharpoons$$ 2 SO3 (g); $$\Delta H^o$$ = -198 kJ One the ...
AIEEE 2003
Which one of the following statements is not true?
AIEEE 2003
The solubility in water of a sparingly soluble salt AB2 is 1.0 $$\times$$ 10-5 mol L-1. Its solubility product number wi...
AIEEE 2003
For the reaction CO (g) + (1/2) O2 (g) $$\leftrightharpoons$$ CO2 (g), Kp/Kc is...
AIEEE 2002
Change in volume of the system does not alter which of the following equilibria?
AIEEE 2002
Let the solubility of an aqueous solution of Mg(OH)2 be x then its Ksp is
AIEEE 2002
Species acting as both Bronsted acid and base is
AIEEE 2002
1 M NaCL and 1 M HCL are present in an aqueous solution. The solution is
AIEEE 2002

## Numerical

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If the solubility product of PbS is 8 $$\times$$ 10$$-$$28, then the solubility of PbS in pure water at 298 K is x $$\ti... JEE Main 2022 (Online) 29th July Morning Shift At$$600 \mathrm{~K}, 2 \mathrm{~mol}$$of$$\mathrm{NO}$$are mixed with$$1 \mathrm{~mol}$$of$$\mathrm{O}_{2}$$.$$2...
JEE Main 2022 (Online) 28th July Evening Shift
In the titration of $$\mathrm{KMnO}_{4}$$ and oxalic acid in acidic medium, the change in oxidation number of carbon at ...
JEE Main 2022 (Online) 27th July Morning Shift
At $$310 \mathrm{~K}$$, the solubility of $$\mathrm{CaF}_{2}$$ in water is $$2.34 \times 10^{-3} \mathrm{~g} / 100 \math... JEE Main 2022 (Online) 27th July Morning Shift At$$298 \mathrm{~K}$$, the equilibrium constant is$$2 \times 10^{15}$$for the reaction :$$\mathrm{Cu}(\mathrm{s})+2 ...
JEE Main 2022 (Online) 26th July Morning Shift
2O3(g) $$\rightleftharpoons$$ 3O2(g) At 300 K, ozone is fifty percent dissociated. The standard free energy change at th...
JEE Main 2022 (Online) 24th June Morning Shift
PCl5 dissociates as PCl5(g) $$\rightleftharpoons$$ PCl3(g) + Cl2(g) 5 moles of PCl5 are placed in a 200 litre vessel whi...
JEE Main 2022 (Online) 24th June Evening Shift
40% of HI undergoes decomposition to H2 and I2 at 300 K. $$\Delta$$G$$^\Theta$$ for this decomposition reaction at one ...
JEE Main 2022 (Online) 26th June Evening Shift
50 mL of 0.1 M CH3COOH is being titrated against 0.1 M NaOH. When 25 mL of NaOH has been added, the pH of the solution w...
JEE Main 2022 (Online) 26th June Morning Shift
2NOCl(g) $$\rightleftharpoons$$ 2NO(g) + Cl2(g) In an experiment, 2.0 moles of NOCl was placed in a one-litre flask and ...
JEE Main 2022 (Online) 27th June Morning Shift
The molar solubility of Zn(OH)2 in 0.1 M NaOH solution is x $$\times$$ 10$$-$$18 M. The value of x is _________ (Nearest...
JEE Main 2021 (Online) 1st September Evening Shift
The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M NaOH is x $$\times$$ 10$$-$$4. The value of x ...
JEE Main 2021 (Online) 31st August Evening Shift
1.22 g of an organic acid is separately dissolved in 100 g of benzene (Kb = 2.6 K kg mol$$-$$1) and 100 g of acetone (Kb...
JEE Main 2021 (Online) 31st August Evening Shift
A3B2 is a sparingly soluble salt of molar mass M (g mol$$-$$1) and solubility x g L$$-$$1. The solubility product satisf...
JEE Main 2021 (Online) 31st August Morning Shift
When 5.1 g of solid NH4HS is introduced into a two litre evacuated flask at 27$$^\circ$$C, 20% of the solid decomposes i...
JEE Main 2021 (Online) 27th August Evening Shift
The number of moles of NH3, that must be added to 2L of 0.80 M AgNO3 in order to reduce the concentration of Ag+ ions to...
JEE Main 2021 (Online) 27th August Morning Shift
The equilibrium constant Kc at 298 K for the reaction A + B $$\rightleftharpoons$$ C + D is 100. Starting with an equimo...
JEE Main 2021 (Online) 26th August Evening Shift
The OH$$-$$ concentration in a mixture of 5.0 mL of 0.0504 M NH4Cl and 2 mL of 0.0210 M NH3 solution is x $$\times$$ 10\$...
JEE Main 2021 (Online) 26th August Morning Shift
2SO2(g) + O2(g) $$\to$$ 2SO3(g)The above reaction is carried out in a vessel starting with partial pressure PSO2 = 250 m...
JEE Main 2021 (Online) 27th July Evening Shift
The equilibrium constant for the reactionA(s) $$\rightleftharpoons$$ M(s) + $${1 \over 2}$$O2(g)is Kp = 4. At equilibriu...
JEE Main 2021 (Online) 27th July Evening Shift
PCl5 $$\rightleftharpoons$$ PCl3 + Cl3Kc = 1.8443.0 moles of PCl5 is introduced in a 1 L closed reaction vessel at 380 K...
JEE Main 2021 (Online) 27th July Morning Shift
Assuming that Ba(OH)2 is completely ionised in aqueous solution under the given conditions the concentration of H3O+ ion...
JEE Main 2021 (Online) 25th July Evening Shift
For the reactionA + B $$\rightleftharpoons$$ 2Cthe value of equilibrium constant is 100 at 298 K. If the initial concent...
JEE Main 2021 (Online) 25th July Morning Shift
CO2 gas is bubbled through water during a soft drink manufacturing process at 298 K. If CO2 exerts a partial pressure of...
JEE Main 2021 (Online) 25th July Morning Shift
Value of KP for the equilibrium reactionN2O4(g) $$\rightleftharpoons$$ 2NO2(g) at 288 K is 47.9. The KC for this reactio...
JEE Main 2021 (Online) 22th July Evening Shift
2SO2(g) + O2(g) $$\rightleftharpoons$$ 2SO3(g)In an equilibrium mixture, the partial pressures are PSO3 = 43 kPa; PO2 = ...
JEE Main 2021 (Online) 20th July Morning Shift
The solubility of CdSO4 in water is 8.0 $$\times$$ 10$$-$$4 mol L$$-$$1. Its solubility in 0.01 M H2SO4 solution is ____...
JEE Main 2021 (Online) 18th March Evening Shift
The gas phase reaction $$2A(g) \rightleftharpoons {A_2}(g)$$ at 400 K has $$\Delta$$Go = + 25.2 kJ mol-1.The equilibrium...
JEE Main 2021 (Online) 18th March Evening Shift
2 molal solution of a weak acid HA has a freezing point of 3.885$$^\circ$$C. The degree of dissociation of this acid is ...
JEE Main 2021 (Online) 18th March Morning Shift
In order to prepare a buffer solution of pH 5.74, sodium acetate is added to acetic acid. If the concentration of acetic...
JEE Main 2021 (Online) 18th March Morning Shift
A 1 molal K4Fe(CN)6 solution has a degree of dissociation of 0.4. Its boiling point is equal to that of another solution...
JEE Main 2021 (Online) 17th March Evening Shift
The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility of oxy...
JEE Main 2021 (Online) 17th March Morning Shift
0.01 moles of a weak acid HA (Ka = 2.0 $$\times$$ 10$$-$$6) is dissolved in 1.0 L of 0.1 M HCl solution. The degree of d...
JEE Main 2021 (Online) 17th March Morning Shift
Sulphurous acid (H2SO3) has Ka1 = 1.7 $$\times$$ 10$$-$$2 and Ka2 = 6.4 $$\times$$ 10$$-$$8. The pH of 0.588 M H2SO3 is ...
JEE Main 2021 (Online) 16th March Evening Shift
For the reaction $$A(g) \rightleftharpoons B(g)$$ at 495 K, $$\Delta$$rG$$^\circ$$ = $$-$$9.478 kJ mol$$-$$1.If we start...
JEE Main 2021 (Online) 16th March Morning Shift
Two salts A2X and MX have the same value of solubility product of 4.0 $$\times$$ 10$$-$$12. The ratio of their molar sol...
JEE Main 2021 (Online) 16th March Morning Shift
The pH of ammonium phosphate solution, if pka of phosphoric acid and pkb of ammonium hydroxide are 5.23 and 4.75 respect...
JEE Main 2021 (Online) 26th February Evening Shift
When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point of solution was found to be $$-$$0.93$$^\... JEE Main 2021 (Online) 26th February Evening Shift A homogeneous ideal gaseous reaction$$A{B_{2(g)}} \rightleftharpoons {A_{(g)}} + 2{B_{(g)}}$$is carried out in a 25 li... JEE Main 2021 (Online) 26th February Morning Shift Assuming ideal behaviour, the magnitude of log K for the following reaction at 25$$^\circ$$C is x$$\times$$10$$-$$1. T... JEE Main 2021 (Online) 24th February Evening Slot The solubility product of PbI2 is 8.0$$\times$$10$$-$$9. The solubility of lead iodide in 0.1 molar solution of lead n... JEE Main 2021 (Online) 24th February Evening Slot For the reaction A(g)$$ \to $$B(g) the value of the equilibrium constant at 300 K and 1 atm is equal to 100.0. The val... JEE Main 2021 (Online) 24th February Morning Slot At 1990 K and 1 atm pressure, there are equal number of Cl2, molecules and Cl atoms in the reaction mixture. The value o... JEE Main 2021 (Online) 24th February Morning Slot The stepwise formation of$${\left[ {Cu{{\left( {N{H_3}} \right)}_4}} \right]^{2 + }}$$is given below: The value of st... JEE Main 2021 (Online) 24th February Morning Slot For a reaction X + Y ⇌ 2Z , 1.0 mol of X, 1.5 mol of Y and 0.5 mol of Z were taken in a 1 L vessel and allowed to react.... JEE Main 2020 (Online) 5th September Evening Slot For the disproportionation reaction 2Cu+(aq) ⇌ Cu(s) + Cu2+(aq) at 298 K. ln K (where K is the equilibrium constant) is ... JEE Main 2020 (Online) 2nd September Evening Slot 10.30 mg of O2 is dissolved into a liter of sea water of density 1.03 g/mL. The concentration of O2 in ppm is__________.... JEE Main 2020 (Online) 9th January Evening Slot 3 g of acetic acid is added to 250 mL of 0.1 M HCL and the solution made up to 500 mL. To 20 mL of this solutions$${1 \...
JEE Main 2020 (Online) 7th January Evening Slot
Two solutions, A and B, each of 100L was made by dissolving 4g of NaOH and 9.8 g of H2SO4 in water, respectively. The pH...
JEE Main 2020 (Online) 7th January Morning Slot

## MCQ (More than One Correct Answer)

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Henry’s constant (in kbar) for four gases $$\alpha$$, $$\beta$$, $$\gamma$$ and $$\delta$$ in water at 298 K is give...
JEE Main 2020 (Online) 3rd September Morning Slot

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