19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
According to law of mass action rate of a chemical reaction is proportional to
In chemical reaction A B, the system will be known in equilibrium when
“Use of isotope (deuterium) in the formation of ammonia clearly indicates that chemical reactions do not reach a state of dynamic equilibrium in which the rates of forward and reverse reactions are unequal and there i…
When the two reactions occur at the same rate, the system reaches
Solid Liquid Liquid Gas Solid Gas The above examples are called
Equilibrium involving ions in aqueous solutions is called as
The stage of the system is the dynamic equilibrium in which
Equilibrium can be established for
Purification of camphor involves
H O l H O vap. In this equation, the double half arrows indicate that
Which of the following is correct for equilibrium state?
If the concentration of OHions in the reaction Fe OH s Fe aq 3OH aq is decreased by 4 times, the equilibrium concentration of Fe will increase by (CBSE AIPMT 2008)
Assertion : Addition of an inert gas at constant pressure equilibrium will support the dissociation of PCl5 at the same temperature. Reason : The addition of an inert gas will tend to increase the total pressure.
Assertion : The addition of an inert gas under constant volume condition cause the total pressure of the system to increase. This would thus lower the degree of dissociation of PCl5. Reason : Addition of inert gas at …
Assertion :A catalyst does not influence the value of equilibrium constant. Reason : Catalyst influence the rate of both forward and backward reactions equally.
Assertion : For PCl5(g) PCl3(g) + Cl2(g). If more Cl2 is added, the equilibrium will shift in backward direction hence equilibrium constant will decrease. Reason : Addition of inert gas to the equilibrium mixture at…
Variation of log K with 1 T is shown by the following graph. Hº for the reaction will be :
In each of the following, total pressure set-up at equilibrium is assumed to be equal and is one atm with equilibrium constants KP given : I :CaCO3 (s) CaO (s) + CO2 (g), K1 II : NH4HS (s) NH3 (g) + H2S (g), K2 III :…
For the chemical equilibrium, CaCO (s) CaO(s) CO (g) , Hº can be determined from which one of the following graphs ? (a) (b) (c) (d)
If for the heterogeneous equilibrium CaCO3(s) CaO(s) + CO2 (g) ; K = 1 at 1 atm, the temperature is given by : (a) Sº T Hº (b) Hº T Sº (c) Gº T R (d) Gº T Hº
In reversible reaction k k A B , the initial concentration of A and B are a and b in moles per litre and the equilibrium concentration are (a – x) and (b + x) respectively ; express x in terms of k1, k2, a and b. (a…
For the all gas reaction at 1000 K : 2HI H2 + I2, K = 0.0344. If you were to begin with 8.0 M of HI in a fixed volume container, what would be the equilibrium concentration of H2 ?
Consider the reaction NaBr(aq) + H2SO4(aq) NaHSO4(aq) + HBr(aq). The equilibrium constant is 8.3 × 10 –2. If the equilibrium concentrations of NaBr, H2SO4 and NaHSO4 are 6.0 M, 9.0 M and 3.0 M respectively, what is th…
When A2 and B2 are allowed to react, the equilibrium constant of the reaction at 27ºC is found (Kc = 4). A2(g) + B2(g) 2AB(g) What will be the equilibrium concentration of AB ?
I I I This reaction is set-up in aqueous medium. We start with 1 mol of I2 and 0.5 mol of I– in 1L flask. After equilibrium is reached, excess of AgNO3 gave 0.25 mol of yellow ppt. Equilibrium constant is : [Given…