Chemistry Question Bank

Assertion : For a reversible reaction, Gibbs’ free energy is zero at equilibrium. Reason : As reaction approaches equilibrium, Gibbs’ free energy decreases.

Assertion : If the equation for a reaction is reversed, the equilibrium constant is inverted and if the equation is multiplied by 2, the equilibrium constant is squared. Reason : The numerical value of equilibrium con…

Assertion : Kp is equal to Kc for the following reaction: N2(g) + O2(g) 2NO(g) Reason : Kp and Kc are interrelated by the following equation : g n p c K K (RT) ng = Number of gaseous moles of products – Number of g…

Assertion : For the reaction g g g g A B C D at the given temperature, there will be no effect by addition of inert gas either at constant pressure or at constant volume. Reason : For the reaction where n = 0,…

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…

If standard heat of dissociation of PCl5 is 230 cal, then slope of the graph of log k vs 1 T is

For exothermic reaction is Sº < 0, then the sketch of log K vs 1/T may be (a) (b) (c) (d)

If for a particular reversible reaction : Kc = 57 at 355ºC and Kc = 69 at 450º, then

When a gas “X” is dissolved in water, the heat is evolved. Then solubility of ‘X’ will increase at

Au(s) Au(l) Above equilibrium is favoured at

For the reaction : N (g) O (g) NO(g) If pressure is increased by reducing the volume of the container, then

Chemical equilibria are important in numerous … (X) … and …. (Y) … processes. Here, (X) and (Y) refer to

Equilibria involving O2 molecules and the protein heamoglobin play a crucial role

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

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.