NEET UG 2015 — Physical Chemistry

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?

Which one is not equal to zero for an ideal solution?

A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as:

When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is:

The number of water molecules is maximum in

Which of the following statements is correct for a reversible process in the state of equilibrium?

If the equilibrium constant for ${N}_{2}(g)+{O}_{2}(g)\rightleftharpoons 2NO(g)$ is K, the equilibrium constant for $\frac{1}{2}{N}_{2}(g)+\frac{1}{2}{O}_{2}(g)\rightleftharpoons NO(g)$ will be:

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:

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (Atomic weight: Mg = 24)

The activation energy of a reaction can be determined from the slope of which of the following graphs?

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

The angular momentum of electron in $d$-orbital is equal to

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?

The ${K}_{\mathrm{sp}}$ of ${\mathrm{Ag}}_{2}{\mathrm{CrO}}_{4}, \mathrm{AgCl}, \mathrm{AgBr}$ and $AgI$ are respectively, $1.1\times {10}^{-12} , 1.8\times {10}^{-10} , 5.0\times {10}^{-13} , 8.3\times {10}^{-17}$ . Which one of the following salts will precipitate last if $AgN{O}_{3}$ solution is added to the solution containing equal moles of NaCl, NaI, NaBr and $N{a}_{2}Cr{O}_{4}$ ?

Which of the following pairs of iron are isoelectronic and isostructural?

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)

Which one of the following pairs of solution is not an acidic buffer?

Aqueous solution of which of the following compounds is the best conductor of electric current?

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