Physical Chemistry

The value of van 't Hoff factor, $i$, for $\text{CH}_3\text{COOH}$ solution in water will be:

The following solutions were prepared by dissolving $1\text{ g}$ of solute in $1\text{ L}$ of the solution. Arrange the following solutions in decreasing order of their molarity:

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Match List-I with List-II:

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Give the reason for low concentration of oxygen in the blood and tissues of people living at high altitude:

Calculate the molality of $\text{KI}$ if the density of $20\%\text{ (mass/mass)}$ aqueous solution of $\text{KI}$ is $1.202\text{ g mL}^{-1}$. (Molar mass of $\text{KI}$ is $166\text{ g mol}^{-1}$):

The unit of $E_{\text{cell}}$ is:

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The following statements describe various properties of a Mercury cell:

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Which cell is used in automobiles and inverters?

A galvanic cell behaves as an electrolytic cell when:

Read the following passage and answer questions 41 to 45: The speed at which a chemical reaction takes place is called the rate of reaction. The rate of reaction depends on various factors like concentration of the reactants, temperature, etc. The relation between the rate of reaction and the concentration of reacting species is represented by the equation $r = k[\text{A}]^x[\text{B}]^y$, where $x$ and $y$ are the order of the reaction with respect to the reactants A and B, respectively. The overall order of the reaction is $x + y$. The rate of reaction can also be increased by the use of a catalyst which provides an alternate pathway of lower activation energy. It increases the rate of forward and backward reaction to an equal extent. It does not alter the Gibbs energy of the reaction.

The rate of a gaseous reaction is given by $r = k[\text{A}][\text{B}]$. If the volume of the reaction vessel is suddenly reduced to $(1/4)^{\text{th}}$ of its initial value, the reaction rate relating to the initial rate will become:

(Based on Chemical Kinetics Passage) Calculate the order of a reaction whose $\text{Rate} = k [\text{A}]^{1/2} [\text{B}]^{3/2}$:

(Based on Chemical Kinetics Passage) The rate law of a reaction is given by $r = k[\text{CH}_3\text{OCH}_3]^{3/2}$. If the pressure is measured in bar and time in minutes, then the unit of rate constant will be:

(Based on Chemical Kinetics Passage) If the rate of reaction becomes twenty-seven times upon increasing the concentration of reactant by three times, the order of this reaction is:

(Based on Chemical Kinetics Passage) The role of a catalyst is to change: