List of top Chemistry Questions

Which of the following expression correctly represents molar conductivity?
At the state of dynamic equilibrium, for solute + solvent gives solution.
Which of the following is the strongest base?
Identify the product C in the series.
C$_6$H$_5$NO$_2 \xrightarrow{\text{Fe/HCl}} A \xrightarrow{\text{NaNO}_2\text{+HCl, } 273\text{ K}} B \xrightarrow{\text{H}_2\text{O, } 283\text{ K}} C$
The rate of the reaction, 2NO + Cl$_2$ $\rightarrow$ 2NOCl is given by the rate equation, rate = k[NO]$^2$[Cl$_2$]. The value of the rate constant can be increased by
A solution of copper sulphate cannot be stored in a zinc vessel because
When blood cells are placed in 1% (w/v) NaCl aqueous solution:
During the electrolysis of acidified water, 16 g of O\(_2\) gas is formed at anode. The volume of H\(_2\) gas liberated at cathode under STP conditions is
Using the standard electrode potential, find out the pair between which redox reaction is not feasible. \( E^{\ominus} \) values: \( \text{Fe}^{3+}/\text{Fe}^{2+} = +0.77\text{V} \); \( \text{I}_2/\text{I}^- = +0.54\text{V} \); \( \text{Cu}^{2+}/\text{Cu} = +0.34\text{V} \); \( \text{Ag}^+/\text{Ag} = +0.80\text{V} \).
Identify conjugate acid and conjugate base for \( HCO_3^- \) ion respectively:
A certain mass of a gas occupies a volume of \(2.5\ \text{dm}^3\) at NTP. Calculate the change in volume of gas at the same temperature if pressure of gas is changed to \(1.25\ \text{atm}\).
What is the pH of \(2 \times 10^{-3}\ \text{M}\) solution of a monacidic weak base if it ionises to the extent of \(5\%\)?
Calculate the pH of \(0.01\ \text{M}\) strong dibasic acid.
Calculate the solubility in \(\text{mol dm}^{-3}\) of sparingly soluble salt BaBr if its solubility product is \(4.9 \times 10^{-13}\) at the same temperature.
Which of the following is true for entropy?
Find the number of atoms present in \(11.2\ \text{L}\) of nitrogen gas at STP.
Which of the following statement is correct for vapor pressure?
Oil of wintergreen is chemically known as:
The magnetic moment of \(Cr^{3+}\) ion is \(3.87\ \text{BM}\). The number of unpaired electrons present is:
Identify the unit of rate constant for a first-order reaction.
The rate of reaction \(A \rightarrow P\) is \(1.25 \times 10^{-2}\ \text{mol dm}^{-3}\text{s}^{-1}\) when \([A] = 0.5\ \text{M}\). Calculate the rate constant if the reaction is second order in \(A\).
Which of the following is not amphoteric in nature?
What is formed when an alkyl cyanide reacts with sodium in ether?
What is the oxidation state of sulfur in Marshall's acid, \(H_2S_2O_8\)?
A solution is prepared by dissolving \(2\) gram of non-volatile solute in \(500\) mL solution at \(27^\circ\text{C}\). The osmotic pressure of the solution is \(0.82\) atm. The molar mass of the solute is: