LMS

Yield of ammonia in Haber’s process can be increased by all except

Ksp values of four salts are given, which is less soluble in water

Solubility product of a salt AB is 0.25 mol2 / dm6, what will be its solubility (mol/dm3)

Select the buffer which is not acidic

A buffer is prepared by mixing the solutions of equimolar acetic acid and sodium acetate. The pH should be equal to

If number of moles of reactants are equal to those of products, then relationship between Kp and Kc is

In Arrhenius equation k = Ae-Ea/RT, ______ depends upon collision frequency

Difference of energy between reactants and transition state is called

The mechanism below has been proposed for the reaction of CHCl₃ with Cl₂Step l: Cl₂(g) 2Cl(g) fastStep 2: Cl(g) + CHCl₃(g) CCl₃(g) + HCl(g) slowStep 3: CCl₃(g) + Cl(g) CCl₄(g) fastRate law for the reaction is

Rate of following reaction can be expressed as PCl₅ PCl₃ + Cl₂

In the hydrolysis of an organic chloride in the presence of large excess of waterR₃C-Cl + H₂O → R₃C-OH + HCl, order of reaction is

Which of following statement is correct about zero order reaction

If during reaction, there is rotation in plane polarized light, then its rate can be determined by

One of the following is not a physical method for determination of rate of reaction

1.0g mole of ethyl alcohol and 1.0g mole of acetic acid are mixed. At equilibrium 0.333g mole of the ester is present. The value of equilibrium constant is

Consider a reaction N₂ + 3H₂ 2NH₃. Correct relation between Kp and Kc is

Appropriate units of Kp for the following reaction is 2SO₃ 2SO₂ + O₂

For 2nd order reaction, rate constant has units

For a reaction like X + 2Y → Z Rate = k [X][Y] ²If concentration of X and Y is doubled, then rate of reaction will increase

Unit of rate of this reaction is

Ionization of phenol can be decreased by adding

If Ksp is greater than the product of concentration of ions at particular temperature, then solution is

The equilibrium constant for the reaction is 10⁵⁵ at 25 °C, this indicates that

Determine partial pressure of NO at equilibrium if partial pressure of N₂ and O₂ are 8 and 32 torr respectively (Kp = 1.0) N₂ + O₂ 2NO

Find the Kc of following reaction if equilibrium concentrations of acetic acid, ethanol, ethyl acetate and water are 1.5M, 1.5M, 2.5M and 2.5M respectivelyCH₃COOH + CH₃CH₂OH CH₃COOCH₂CH₃ + H₂O

An addition of NH₄Cl in NH₄OH solution suppresses the concentration of

The order of reaction may be determined by

Half-life of the reaction becomes half when initial concentrations of reactants are doubled. The order of the reaction will be

Following is the condition of reversible reaction that is not affected by pressure (where ∆n = number of moles of product–number of moles of reactants)

For endothermic reaction, the minimum value for the energy of activation will be

Catalyst can change

pH of buffer in which concentrations of salt and base are 0.1M and 0.01M respectively (pKb = 4.0)

Equilibrium position is shifted backward by increasing temperature in all except

Ksp for following can be written as PbCl₂ Pb⁺²+ 2Cl^–

Slowest step in the reaction is called

In a reaction, A + B → Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 4 when the concentrations of both the reactants (A and c. are doubled, rate law for the reaction can be written as

The solubility product of PbSO4 is 4 x 10 ^-6 mol ². dm ^-6. The maximum concentration of Pb⁺² ions is

The rate of a chemical reaction doubles for every 10°C rise of temperature. If the temperature is raised by 60°C, the rate of the reaction increases by about

Which will change for first order reaction with time

Rate of exothermic reaction is increased by increasing all except

A certain reaction has the rate equation, Rate = k[A][B] ². The rate is 2.5×10 ^-3mol dm ^-3s ^-1. When [A] is 0.2 mol dm ^-3 and [B] is 0.050 mol dm ^-3. Calculate the numerical value of rate constant

Half-life of radioactive isotope is 30days. Days required when 12.5% concentration is left behind

Half-life of certain reaction decreases with decrease in concentration. Order of reaction is

Following is an exothermic reaction. Which is correct statement?

At equilibrium, relationship between concentrations of reactants and products

For the gas phase reaction yield of Z at equilibrium could be increased by

The units of equilibrium constant for the reaction are

For the reaction one starts with 6 moles A and 7 moles B per dm3. When equilibrium is attained, 4.5 moles of C and 4.5 moles of D are formed, what is the value of Kc for the reaction

Potential energy of activated complex for exothermic reaction is

Unit of slope in Arrhenius equation is