Chemistry Question Bank

Which of the following is correct for equilibrium state?

H O l H O vap. In this equation, the double half arrows indicate that

Purification of camphor involves

Equilibrium can be established for

The stage of the system is the dynamic equilibrium in which

Equilibrium involving ions in aqueous solutions is called as

Solid Liquid Liquid Gas Solid Gas The above examples are called

For the reaction C(s) CO (g) 2CO(g) The partial pressure of CO and CO are 2.0 and 4.0 atm respectively then equilibrium p K for the reaction will be (BCECE 2008)

Equimolar concentrations of H and I are heated to equilibrium in a 2 L flask. At equilibrium, the forward and the backward rate constants are found to be equal. NH N NH What percentage of initial concentration of H …

In the equilibrium 2NH N 3H , 6 moles of is taken in 10 L flask. If concentration of at equilibrium is x, then concentration of at equilibrium is (DUMET 2008)

Now, the total pressure at equilibrium, p(1 α)+pα+0.5pα = P P p = ...(2) 1+0.5α From eq (1) and eq(2), p P P P K 0.5 1 + 0.5α K P 0.5 2K P x x

The dissociation equilibrium of a gas AB can be represented as 2AB (g) 2AB(g) B (g) The degree of dissociation is ‘x’ and is small compared to 1. The expression relating the degree of dissociation (x) with equilibr…

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 For the reaction, N (g) 3H (g) 2NH (g) Unit of Kc = L2 mol–2 Reason For the reaction N (g) 3H (g) 2NH (g) Equilibrium constant, c [NH ] K [N ][H ] (AIIMS 2008)

Ice and water kept in a perfectly insulated thermos flask (no exchange of heat between its contents and the surroundings) at 273 K and the atmospheric pressure are in equilibrium state and the system shows

For any pure substance at atmospheric pressure, the temperature at which the solid and liquid phases are at equilibrium is called the normal …(X)… or normal …(Y)… of the substance.

H O l H O vap. Point out the correct statement for this equilibrium

For any pure liquid at 1 atm pressure (1.013 bar), the temperature at which the liquid and vapours are at equilibrium is called normal …(X)… of the liquid. Here, (X) refers to

Which of the following statement is correct?

The solid-vapour equilibrium can be represented as I. I2 (solid) I2 (vapour) II. Camphor (solid) Camphor (vapour) III. NH4Cl (solid) NH4Cl (vapour) Point out the correct option(s).

When no more solute can be dissolved in solution at a given temperature is known as

The rate of dissolution of sugar is equal is equal to rate of crystallization of sugar can be represented as

CO gas CO insolution This equilibrium is governed by

Chemical equilibrium is …(X)… in nature as it consists of a …(Y)… reaction in which the reactants give product(s) and ….(Z)… reaction in which products gives the original reactants. Here, (X), (Y) and (Z) refer to

When the two reactions occur at the same rate, the system reaches