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Equilibrium

Chemistry

Previous Years Questions

MCQ (Single Correct Answer)

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3O2(g) $$\rightleftharpoons$$ 2O3(g) for the above reaction at 298 K, Kc is found to be 3.0 $$\times$$ 10$$-$$59. If the...
NEET 2022
The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is [Given pKa of CH3COOH = ...
NEET 2022
The pKb of dimethyl amine and pKa of acetic acid are 3.27 and 4.77 respectively at T (K). The correct option for the pH ...
NEET 2021
Find out the solubility of Ni(OH)2 in 0.1M NaOH. Given that the ionic product of Ni(OH)2 is 2 $$ \times $$ 10-15....
NEET 2020 Phase 1
Hydrolysis of sucrose is given by the following reaction.Sucrose + H2O ⇌ Glucose + FructoseIf the equilibrium constant (...
NEET 2020 Phase 1
Which will make basic buffer?
NEET 2019
pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp) of Ca(OH)2 is :...
NEET 2019
Conjugate base for Bronsted acids H2O and HF are :
NEET 2019
Which one of the following conditions will favour maximum formation of the product in the reaction A2(g) + B2(g) ⇌ X2(g...
NEET 2018
The solubility of BaSO4 in water is 2.42 × 10–3 g L–1 at 298 K. The value of its solubility product (Ksp) will be (Give...
NEET 2018
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations : A. 60 mL $${...
NEET 2018
A 20 litre container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO)...
NEET 2017
Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 $$ \times $$ 10$$-$$4 mol L$$-$$1. Solubility pr...
NEET 2017
The equilibrium constants of the following are N2 + 3H2 $$\rightleftharpoons$$ 2NH3;     K1 N2...
NEET 2017
MY and NY3, two nearly insoluble salts, have the same Ksp values of 6.2 $$ \times $$ 10$$-$$13 at room temperature. Whic...
NEET 2016 Phase 1
The solubility of AgCl(s) with solubility product 1.6 $$ \times $$ 10$$-$$10 in 0.1 M NaCl solution would be...
NEET 2016 Phase 2
Which of the following fluro-compounds is most likely to behave as a Lewis base ?
NEET 2016 Phase 2
The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5N+H) ina 0.10 M aqueous pyridine solution (Kb for C5H...
NEET 2016 Phase 2
Consider the following liquid-vapour equilibrium. Liquid $$\rightleftharpoons$$ Vapour Which of the following relation...
NEET 2016 Phase 1
If the value of equilibrium constant for a particular reaction is 1.6 $$ \times $$ 1012, then at equilibrium the system ...
AIPMT 2015 Cancelled Paper
Which of the following statements is correct for a reversible process in a state of equilibrium?
AIPMT 2015 Cancelled Paper
The Ksp of Ag2CrO4,  AgCl,  AgBr  and Agl  are respectively, 1.1 $$ \times $$ 10$$-...
AIPMT 2015 Cancelled Paper
Which one of the following pairs of solution is not an acidic buffer ?
AIPMT 2015
Aqueous solution of which of the following compounds is the best conductor of electric current ?
AIPMT 2015
If the equilibrium constant for N2(g) + O2(g) $$\rightleftharpoons$$ 2NO(g) is K, the equilibrium constant for $${1 \o...
AIPMT 2015
What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?
AIPMT 2015
For the reversible reaction, N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g) + heat The equilibrium shifts in forward...
AIPMT 2014
For a given exothermic reaction, Kp and K'p are the equilibrium constants at temperatures T1 and T2, respectively. Ass...
AIPMT 2014
Using the Gibb's energy change, $$\Delta $$Go = +63.3 kJ, for the following reaction, Ag2CO3(s) $$\rightleftharpoons$$...
AIPMT 2014
Which of the following salts will give highest pH in water?
AIPMT 2014
The dissociation constant of weak acid is 1 $$ \times $$ 10$$-$$4. In order to prepare a buffer solution with a pH = 5, ...
NEET 2013 (Karnataka)
The values of Ksp of CaCO3 and CaC2O4 are 4.7 $$ \times $$ 10$$-$$9 and 1.3 $$ \times $$ $$-$$9 respectively at 25oC. I...
NEET 2013 (Karnataka)
At 100oC the Kw of water is 55 times its value at 25oC. What will be the pH of neutral solution? (log 55 = 1.74)...
NEET 2013 (Karnataka)
Accumulation of lactic acid (HC3H5O3), a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 M a...
NEET 2013 (Karnataka)
Which of these is least likely to act as a lewis base ?
NEET 2013
KMnO4 can be prepared from K2MnO4 as per the reaction, 3MnO42$$-$$ + 2H2O $$\rightleftharpoons$$ 2MnO4$$-$$ + MnO2 + ...
NEET 2013
Buffer solutions have constant acidity and alkalinity because
AIPMT 2012 Prelims
Given that the equilibrium constant for the reaction, 2SO2(g) + O2(g) $$\rightleftharpoons$$ 2SO3(g) has a value of 27...
AIPMT 2012 Mains
Given the reaction between 2 gases represented by A2 and B2 to give the compound AB(g), A2(g) + B2(g) $$\rightlefthar...
AIPMT 2012 Mains
Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH ...
AIPMT 2012 Prelims
pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp) of Ba(OH)2 is ...
AIPMT 2012 Prelims
In qualitative analysis, the metals of group I can be separated from other ions by precipitating them as chloride salts....
AIPMT 2011 Mains
For the reaction, N2(g) + O2(g) $$\rightleftharpoons$$ 2NO(g), the equilibrium constant is K1. The equilibrium constant...
AIPMT 2011 Prelims
Which of the following is least likely to behave as Lewis base?
AIPMT 2011 Prelims
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH+4 is 0.20 M. If t...
AIPMT 2011 Prelims
The value of $$\Delta $$H for the reaction X2(g) + 4Y2(g) $$\rightleftharpoons$$ 2XY4(g) is less than zero. Formation ...
AIPMT 2011 Prelims
The reaction, 2A(g) + B(g) $$\rightleftharpoons$$ 3C(g) + D(g) is begun with the concentrations of A and B both at an...
AIPMT 2010 Mains
What is [H+] in mol/L of a solution that is 0.20 M in CH3COONa and 0.10 M in CH3COOH? Ka for CH3COOH = 1.8 $$ \times $...
AIPMT 2010 Prelims
In which of the following equilibrium Kc and Kp are not equal?
AIPMT 2010 Prelims
In a buffer solution containing equal concentration of B$$-$$ and HB, the Kb for B$$-$$ is 10$$-$$10. The pH of buffe...
AIPMT 2010 Prelims
If pH of a saturated solution of Ba(OH)2 is 12, the value of its Ksp is
AIPMT 2010 Prelims
Which of the following molecules acts as a Lewis acid?
AIPMT 2009
The ionization constant of ammonium hydroxide is 1.77 $$ \times $$ 10$$-$$5 at 298 K. Hydrolysis constant of ammonium ch...
AIPMT 2009
What is the [OH$$-$$] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2? ...
AIPMT 2009
The dissociation constants for acetic acid and HCN at 25oC are 1.5 $$ \times $$ 10$$-$$5 and 4.5 $$ \times $$ 10$$-$$...
AIPMT 2009
Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H+ ion concentration in t...
AIPMT 2008
The value of equilibrium constant of the reaction HI(g) $$\rightleftharpoons$$ $${1 \over 2}$$H2(g) + $${1 \over 2}$$I2...
AIPMT 2008
The values of for the reactions, X $$\rightleftharpoons$$ Y + Z      . . . .(i) A $$\r...
AIPMT 2008
If the concentration of OH$$-$$ ions in the reaction Fe(OH)3(s) $$\rightleftharpoons$$ Fe3+(aq) + 3OH$$-$$(aq) is decr...
AIPMT 2008
The dissociation equilibrium of a gass AB2 can be represented as : 2AB2(g) $$\rightleftharpoons$$ 2AB(g) + B2(g) The d...
AIPMT 2008
Calculate the pOH of a solution at 25oC that contains 1 $$ \times $$ 10$$-$$10 M of hydronium ions, i.e. H3O+....
AIPMT 2007
A weak acid, HA, has a Ka of 1.00 $$ \times $$ 10$$-$$5. If 0.100 mol of this acid is dissolved in one litre of water, t...
AIPMT 2007
The equilibrium constants of the following are N2 + 3H2 $$\rightleftharpoons$$ 2NH3;     K1 N2...
AIPMT 2007
For the reaction : CH4(g) + 2O2(g) $$\rightleftharpoons$$ CO2(g) + 2H2O(l), $$\Delta $$Hr = $$-$$ 170.8 kJ mol$$-$$1....
AIPMT 2006
The hydrogen ion concentration of a 10$$-$$8 M, HCl aqueous solution at 298 K (Kw = 10$$-$$14) is ...
AIPMT 2006
Which of the following pairs constitutes a buffer?
AIPMT 2006
Equilibrium constants K1 and K2 for the following equilibriam: are related as ...
AIPMT 2005
H2S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative...
AIPMT 2005
At 25oC, the dissociation constant of a base, BOH, is 1.0 $$ \times $$ 10$$-$$12. The concentration of hydroxyl ions in ...
AIPMT 2005
The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. pH o...
AIPMT 2004
The solubility product of a sparingly soluble salt AX2 is 3.2 $$ \times $$ 10$$-$$11. Its solubility (in moles/L) is ...
AIPMT 2004
The solubility product of AgI at 25oC is 1.0 $$ \times $$ 10$$-$$16 mol2 L$$-$$2. The solubility of AgI in 10$$-$$4 N so...
AIPMT 2003
The reaction quotient (Q) for the reaction N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g) is given by $$Q = {{{{\left[ ...
AIPMT 2003
In Haber process 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of t...
AIPMT 2003
Which one of the following statements is not true?
AIPMT 2003
The equilibrium constants of the following are N2 + 3H2 $$\rightleftharpoons$$ 2NH3;     K1 N2...
AIPMT 2003
Solution of 0.1 N NH4OH and 0.1 N NH4Cl has pH 9.25. Then find out pKb of NH4OH...
AIPMT 2002
Reaction BaO2(g) $$\rightleftharpoons$$ BaO(s) + O2(g); $$\Delta $$H = +ve. In equilibrium condition, pressure of O2...
AIPMT 2002
Which has highest pH?
AIPMT 2002
Solubility of MX2 type electrolytes is 0.5 $$ \times $$ 10$$-$$4 mole/lit., then find out Ksp of electrolytes. ...
AIPMT 2002
Correct relation between dissociation constants of a dibasic acid is
AIPMT 2001
Ionisation constant of CH3COOH is 1.7 $$ \times $$ 10$$-$$5 and concentration of H+ ions is 3.4 $$ \times $$ 10$$-...
AIPMT 2001
Solubility of M2S salt is 3.5 $$ \times $$ 10$$-$$6 then find out solubility product.
AIPMT 2001
In HS$$-$$, I$$-$$, R $$-$$ NH2, NH3 order of proton accepting tendency will be...
AIPMT 2001
Equilibrium constant Kp for following reaction MgCO3(s) $$\rightleftharpoons$$ MgO(s) + CO2(g)...
AIPMT 2000
Which statement is wrong about pH and H+?
AIPMT 2000
For any reversible reaction, if we increase concentration of the reactants, then effect on equilibrium constant
AIPMT 2000
Conjugate acid of NH2$$-$$ is
AIPMT 2000

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