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The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of polarizing power?

Calculate the hydration enthalpy of ions for $NaCl\left(s\right)$ from the following data.
${\Delta }_{lattice}H=+788kJmo{l}^{-1}$
${\Delta }_{sol}H=+4kJmo{l}^{-1}$

The alkaline earth metal that forms mainly covalent compounds is

The first ionization enthalpy values (in kJmol^–1) of group 13 elements are :

How would you explain this deviation from the general trend?

The oxidation number of cobalt in K[Co(CO)₄] is

(i) +1

(ii) +3

(iii) −1

(iv) −3

The number of atoms per unit cell in a body centred cubic arrangement is:

At high pressure, van der Waal's equation for one mole of the gas becomes:

Calculate solubility of $AgCl$ in $0.1MNaCl$ at ${25}^{o}C$ if its solubility product at same temperature is $2.0\times {10}^{-10}mo{l}^2{L}^{-2}$.

Out of which is more resonance stabilized?

The real gas equation at high pressure will be:

The work function of a metal is $4\text{eV}$. To emit a photoelectron of zero velocity from the surface of the metal, the wavelength of the incident light should be:

If NaCl is doped with ${10}^{-3}mol\%$ of $SrC{l}_{2^{\prime }},$ each $S{r}^{2+}$ ion replaces two $N{a}^{+}$ ions, but occupies only one lattice point in place of $N{a}^{+}$ ion. This creates one cation vacancy.

The ratio of the areas within the electron orbits for the first excited state, to the ground state, for the hydrogen atom is,

Which of the following reacts with $NaN{O}_2+HCl$ followed by warming with water to give phenol?

At ${80}^{\circ }\text{C}$, the vapour pressure of a pure liquid $A$ is $520\text{mm Hg}$ and that of a pure liquid of $B$ is $1000\text{mm Hg}$. If the ideal mixture of liquids $A$ and $B$ boils at ${80}^{\circ }\text{C}$ and 1 atm pressure, the amount of solution A in the mixture is: (1 atm = 760 mm Hg)

Which pair of compounds has the highest and the least boiling point?

Calculate moles of $KMn{O}_4$ required for complete oxidation of 2 moles of $KH{C}_2{O}_4.2H_2{C}_2{O}_4$ under acidic condition.

The kinetic energy of an electron is $4.55\times {10}^{-25}J$. Calculate the de Broglie wavelength for the same.

$h=6.6\times {10}^{-34}Js,\text{mass of electron}=9.1\times {10}^{-31}kg$

Consider the following cases A and B in Ostwald-Walker Method:

Case A : Dry air is passed through a pure solvent and then, a dehydrating agent.



Case B: Dry air is passed through a pure solvent and then a solution with non-volatile solute and then, a dehydrating agent



Here,

$p^{\circ }\text{is the vapour pressure of the pure solvent}$

$p_s\text{is the vapour pressure of the solution}$



Choose the correct option(s) :

Allyl halides react with metallic sodium in dry ether producing

Reaction between $N_2$ and $O_2$ takes place as follows:
$2N_2\left(g\right)+O_2\left(g\right)\leftrightarrow 2N_{2}O\left(g\right)$
If a mixture of 0.482 mol of $N_2$ and 0.933 mol of $O_2$ is placed in a 10 L reaction vessel and allowed to form $N_{2}O$ at a temperature for which $K_c=2.0\times {10}^{-37}$, determine the composition of equilibrium mixture.

Which of the following structures is pyrogallol?

Of the following 0.1 M aqueous solutions, which one will exhibit the largest freezing point depression?

1 kg of a solution of calcium carbonate contains 1 g of calcium carbonate.

The concentration of the solution will be:

Arrange the bond energy of $H_a,H_b,H_c\text{and}{H}_d$ in decreasing order.

Consider the following reaction:



Identify the structure of the major product X.

What is the role of graphite rod in the electrometallurgy of aluminimum ?