Chemistry Question Bank

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).

Equilibrium constant for the reaction H I 2HI is correctly given by the expression (a) c [H ][I ] K [HI] (b) c [H ][I ] K [2 HI] (c) c [H ][I ] K [HI] (d) c [HI] K [H ][I ]

The active mass of 64 g of HI in a two litre flask would be

A mixture of reactants and products in the equilibrium state is called

The equilibrium equation is also known as the …X… because in the early days of chemistry, concentration was called …Y… Here, (X) and (Y) refer to

For a reaction, H g I g 2HI g c HI g K H g I g Point out the correct statement.

At a given temperature, the product of …X… of the reaction products raised to the respective stoichiometric of coefficient in the balanced chemical equation …Y… by the product of concentrations of the reactants raised…

Molar concentration of different species is indicated by enclosing these in square bracket and it is implied that these are

The following concentrations were obtained for the formation of NH3 from N2 and H2 at equilibrium at 500 K. N 1.5 10 M. x H 3.0 10 M x and NH 1.2 10 M. x Calculate the equilibrium constant. (a) 1.08 10 x (…

At equilibrium the concentrations of N 3.0 10 M x , O 4.2 10 M x and NO 2.8 10 M x in a sealed vessel at 800K. What will be Kc for the reaction, N g O g 2NO g ?

In a homogeneous system , all the reactants and products are in the

Which of the following reaction(s) is/are in homogeneous equilibria? (a) N g 3H g 2NH g (b) CH COOC H aq H O l CH COOH aq C H OH aq (c) Fe aq SCN aq Fe SCN aq

What is the relation between Kp and Kc for a general reaction, aA bB cC dD? (a) n p c K K RT (b) n c p K K RT (c) p n c K K RT (d) c n p K K RT

PCl5, PCl3 and Cl2 are at equilibrium at 500 K and having concentration 1.59 M PCl3, 1.59 M Cl2 and 1.41 M PCl5 . Calculate Kc for the reaction. PCl PCl Cl