NEET UG Chemistry — Physical Chemistry previous year questions with solutions.
The pressure of ${H}_{2}$ required to make the potential of hydrogen electrode zero in pure water at 298 K is:
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 correct thermodynamic conditions for the spontaneous reaction at all temperatures is:
The percentage of pyridine $({C}_{5}{H}_{5}N)$ that forms pyridinium ion $({C}_{5}{H}_{5}{N}^{+}H)$ in a $0.10M$ aqueous pyridine solution $({K}_{b} \mathrm{for} {C}_{5}{H}_{5}N=1.7\times {10}^{-9})$ 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 solubility of $AgCl(s)$ with solubility product $1.6\times {10}^{-10}$ in $0.1 M NaCl$ solution would be
The addition of a catalyst during a chemical reaction alters which of the following quantities?
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?
The boiling point of $0.2 mol k{g}^{-1}$ solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?
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 the mass of the precipitate formed when 50 mL of $16.9%$ solution of $AgN{O}_{3}$ is mixed with 50 mL of $5.8%$ NaCl solution? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5)
The heat of combustion of carbon to $C{O}_{2}$ is$-393.5\mathrm{kJ}/\mathrm{mol}$. The heat released upon the formation of $35.2g$ of $C{O}_{2}$ from carbon and oxygen gas is
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)?
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?
The rate constant of the reaction $A\longrightarrow B$ is $0.6\times {10}^{-3}$ mole per liter per second. If the initial concentration of A is 5 M, then the concentration of B after 20 minutes is: