Physical Chemistry PYQ — Page 10

Consider the following liquid - vapour equilibrium. $Liquid\rightleftharpoons Vapour$ Which of the following relations is correct?

Suppose the elements $X$ and $Y$ combine to form two compounds $X{Y}_{2}$ and ${X}_{3}{Y}_{2}$. When $0.1\mathrm{mole}$ of $X{Y}_{2}$ weighs $10g$ and $0.05\mathrm{mole}$ of ${X}_{3}{Y}_{2}$ weighs $9g$, the atomic weights of $X$ and $Y$ are

MY and $N{Y}_{3}$ , two nearly insoluble salts, have the same ${K}_{sp}$ values of $6.2\times {10}^{-13}$ at room temperature. Which statement would be true in regard to MY and $N{Y}_{3}$ ?

Which of the following pairs of $d-$orbitals will have the electron density along the axis?

If the ${E}_{cell}^{o}$ for a given reaction has a negative value, which of the following gives the correct relationship for the values of $\Delta {G}^{o}$ and ${K}_{eq}$?

During the electrolysis of molten sodium chloride, the time required to produce $0.10\mathrm{mol}$ of chlorine gas using a current of $3\mathrm{amperes}$ is

Fog is a colloidal solution of:

How many electrons can fit in each orbital for which $n=3$ and $l=1$?

The rate of a first-order reaction is $0.04 mol {l}^{-1}{s}^{-1}$ at $10$ second and $0.03 mol {l}^{-1}{s}^{-1}$ at $20$ seconds after initiation of the reaction. The half-life period of the reaction is:

Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at ${25}^{o}C$ . (Given vapour pressure data at ${25}^{o}C$ , benzene = 12.8 kPa, toluene = 3.85 kPa)

The number of electrons delivered at the cathode, during electrolysis by a current of $1\mathrm{ampere}\mathrm{in}60\mathrm{seconds}$ is (charge on electron $=1.60\times {10}^{-19} C$)

At ${100}^{o}C$ the vapour pressure of a solution of 6.5 g of a non-volatile solute in 100 g water is 732 mm. If ${K}_{b}=0.52$ , the boiling point of this solution will be:

The van't Hoff factor $(i)$ for a dilute aqueous solution of the strong electrolyte barium hydroxide is

The molar conductivity of a $0.5\mathrm{mol}{\mathrm{dm}}^{-3}$ solution of $AgN{O}_{3}$ with electrolytic conductivity of $5.76\times {10}^{-3}S c{m}^{-1}$ at $298K$

If the value of an equilibrium constant for a particular reaction is $1.6\times {10}^{12}$, then at equilibrium the system will contain:

Which of the following processes does not involve oxidation of iron?

Which is the correct order of increasing energy of the listed orbitals in the atom of titanium? (At. No. Z = 22)

Which one of the following electrolytes has the same value of van's Hoff's factor (i) as that of $A{l}_{2}{(S{O}_{4})}_{3}$ (if all are $100%$ ionized)?

If Avogadro number ${N}_{A}$ , is changed from $6.022\times {10}^{23} mo{l}^{-1}$ to $6.022\times {10}^{20} mo{l}^{-1}$ , this would change:

Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified $KMn{O}_{4}$ for complete oxidation?

What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?

What is mole fraction of the solute in a 1.00 m aqueous solution?

A mixture of gases contains ${H}_{2}$ and ${O}_{2}$ gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture?

The number of $d$-electrons in ${\mathrm{Fe}}^{2+}(Z=26)$ is not equal to the number of electrons in which one of the following?