List of top Chemistry Questions

In chromite ore, the oxidation number of iron and chromium are respectively

During the adsorption of Krypton on activated charcoal at low temperature

Which of the following carbonyls will have the strongest C-O bond ?

Identify the compound that exhibits tautomerism.

The rate of the reaction $ {2 N_2 O_5 -> 4 NO_2 + O_2}$ can be written in three ways: $\frac{-d [N_2 O_5]}{dt} = k [N_2 O_5]$ $\frac{d[NO_2]}{dt} = k' [N_2 O_5]$ $\frac{d[O_2]}{dt} = k" [N_2 O_5]$ The relationship between k and k' and between k and k'' are-

Which one of the following is an intermediate in the reaction of benzene with $CH_3Cl$ in the presence of anhydrous $AlCl_3$?

Increasing order of carbon-carbon bond length for the following is $\underset{(A)}{C_2H_4}\,\, \underset{(B)}{C_2H_2}\,\, \underset{(C)}{C_6H_6}\,\, \underset{(D)}{C_2H_6}$

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

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