Chemistry Question Bank

The half-life period of a first order reaction is

In a first order reaction, reactant concentration ‘C’ varies with time ‘t’ as

In a first order reaction the concentration of reactant decreases from 800 mol/dm3 to 50 mol/dm3 in 2 × 104 sec. The rate constant of reaction in sec–1 is:

For a first order reaction, (A) -> product the concentration of A changes from 0.1 M to 0.025 M in40 min. The rate of reaction when the concentration of A is 0.01 M is

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)

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.

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