List of top Chemistry Questions

The following data is obtained during the first order thermal decomposition of $2A_{(g)} \rightarrow B_{(g)} + C_{(s)}$, at constant volume and temperature The rate constant in $min^{-1}$ is

Consider the following gaseous equilibria with equilibrium constants $K_1$ and $K_2$ respectively. $SO_{2(g)} + \frac{1}{2} O_{2(g)} \leftrightharpoons SO_{3(g)}$ $2SO_{3(g)} \leftrightharpoons 2SO_{2(g)} + O_{2(g)}$ The equilibrium constants are related as

$\alpha$ - maltose consists of

The freezing point depression constant for water is $-1.86^{\circ} Cm^{-1}$. If $5.00 \,g$ $Na_2SO_4$ is dissolved in $45.0\,g$ $H_2O$, the freezing point is changed by $- 3.82^{\circ} C$. Calculate the Van't Hoff factor for $Na_2SO_4$.

With respect to the velocity constant of a reaction, which one of the following statement is not correct?

Consider the following processes : $\Delta H (kJ / mol)$ ½ A → B + 150 3B → 2C + D -125 E + A → 2D +350 For B + D → E + 2C, ΔH will be-

Which of the following is correct option for free expansion of an ideal gas under adiabatic condition ?

The hybridisation states of $ [Ni(CO)_4] $ , $ [Ni(CN)_4]^{2-} $ and $ [NiCl_4]^{2-} $ species are respectively

Which of the following has the minimum bond length?

The total number of atomic orbitals in fourth energy level of an atom is :

Which one of the following statements is false?

The number of naturally occurring p-block elements that are diamagnetic is

For the reversible reaction $A_{(s)}+B_{(g)}\leftrightharpoons C_{(g)} +D_{(g)} \Delta G^\circ=-350kJ $ which one of the following statements is true?

The oxidation state of chromium in the final product formed by the reaction between $KI$ and acidified potassium dichromate solution is

The most stable $+2$ oxidation state is exhibited by

Which of the following compounds has least boiling point?

The system that forms maximum boiling azeotrope is

Which one of the following is a non-benzenoid aromatic compound?

The titanium (atomic number 22) compound that does not exist is

If the energies of the two photons are in the ratio of $3 : 2$, their wavelengths will be in the ratio of

The IUPAC name of the complex $[Co (NH_3)_4 Cl_2 ]Cl$ is

The spin only magnetic moment of $Fe^{2+}$ ion $(in\, B.M.)$ is approximately

The correct order of acid strength of the following compounds: 
(A) Phenol\(\quad\) 
(B) p-Cresol \(\quad\)
(C) m-Nitrophenol \(\quad\)
(D) p-Nitrophenol is :

Hybridization of $C_2$ and $C_3$ of $H_3C - CH = C = CH - CH_3$ are

Among the following compounds, the most acidic is