List of top Chemistry Questions

Reason of lanthanoid contraction is

The pair of compounds that can exist together is

The reaction of aqueous $KMnO_4$ with $ H_2O_2 $ in acidic conditions gives

Using the Gibbs energy change, $\Delta G^\circ = +63.3kJ$ , for the following reaction, $Ag_2CO_3 \rightleftharpoons 2Ag^+_{(aq)}+CO^{2^−}_{3(aq)}$ the $K_{sp}$ of $Ag_2CO_3(s)$ in water at $25^∘$C is ($R=8.314JK^{−1}mol^{−1}$)

When 22.4 L of $H_{2(g)}$ is mixed with 11.2 L of $Cl_{2(g)}$, each at STP, the moles of $HCl_{(g)}$ formed is equal to

Which property of colloids is not dependent on the charge on colloidal particles?

Which one of the following species has plane triangular shape?

Which of the following will be most stable diazonium salt $(R\, N^{+}_{2}\,X^{-})$ ?

Which of the following statements is correct for the spontaneous adsorption of a gas?

Which of the following salts will give highest $ pH $ in water?

Which of the following organic compounds has same hybridisation as its combustion (CO$_2$) product?

Which of the following will not be soluble in sodium hydrogen carbonate?

Among the following sets of reactants which one produces anisole?

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from $0.75\, g$ of sample neutralized $10\, mL$ of ${1 \, M \, H_2SO_4}$. The percentage of nitrogen in the soil is :

What are the possible values of magnetic quantum number for $p$ orbital?

Identify 'A' in the following reaction.

What is the IUPAC name of following compound?

Identify the reagent 'R' necessary to bring the following conversion.

If osmotic pressure of $0.2 \text{ M}$ aqueous glucose solution is $5 \text{ atm}$ at $300 \text{ K}$. Calculate the concentration of glucose solution having osmotic pressure $2.5 \text{ atm}$ at same temperature.

Which amino acid from following contains highest number of N atoms in it?

If A, B, C, D are four different elements with outer electronic configuration as
A = $4s^2 4p^4$, B = $4s^2 4p^5$, C = $5s^2 5p^4$, D = $5s^2 5p^5$.
Find the element having highest ionization enthalpy ($\Delta_i H_1$)

Calculate the final pressure required to reduce the volume of a gas to one third, if initial pressure is $1.6 \times 10^5 \text{ Nm}^{-2}$.

Identify the coordination number of aluminium in potassium trioxalatoaluminate(III).

What is the change in internal energy for $2\text{CO}_{(g)} + \text{O}_{2(g)} \rightarrow 2\text{CO}_{2(g)}$ at $25^\circ\text{C}$ ?
( $\text{R} = 8.314 \text{ J K}^{-1} \text{ mol}^{-1}$, $\Delta H = -560 \text{ kJ}$ )}

Which of the following isomeric amines has the highest boiling point?