List of top Chemistry Questions

The increasing order of atomic radii is
Which of the following molecules has an expanded octet?
Which of the following is correct about the stability of half-filled and completely filled subshells?
(i) Relatively small shielding
(ii) Larger coulombic repulsion energy
(iii) Smaller exchange energy
(iv) Smaller coulombic repulsion energy
(v) Larger exchange energy
Which of the following is an extensive property?
Which of the following molecules has 3 bond pairs and 2 lone pairs of electrons?
The correct order of ionization enthalpy is
The order of energy of orbitals in the same subshell is
A solution is prepared by adding 4 g of a substance to 46 g of ethanol. What is the mass percentage of the solute?
\( E^\circ_{\text{Cell}} = 1.1 \, \text{V}. \, \text{Find} \, E_{\text{Cell}} \, \text{for the reaction:} \, \text{Zn} + \text{Cu}^{2+} \, (0.1M) \rightleftharpoons \text{Zn}^{2+} \, (0.001M) + \text{Cu} \)
A first-order reaction is 75 percent completed in 6000s. What is the half-life?
Total number of orbitals when \( n = 3 \)?
Alkali metal with highest first ionization enthalpy is:
Maximum magnetic moment shown by:
Molecule with 2\( \sigma \) and 2\( \pi \) bonds:
Number of valence electrons in Germanium?
Which of the following contains 2 primary –OH groups in its structure?
Find the \( \Delta G \) during the reaction: \[ \text{H}_2\text{O}(l) \rightleftharpoons \text{H}_2\text{O}(g) \quad \Delta S = +1 \, \text{kJ/mol} \, \text{at} \, 100^\circ C \]
The most basic oxide
In which of the following \( K_c = K_p \)? a) \( \text{PCl}_5(g) \rightleftharpoons \text{PCl}_3(g) + \text{Cl}_2(g) \) b) \( \text{H}_2(g) + \text{I}_2(g) \rightleftharpoons 2\text{HI}(g) \)
Given the following concentrations and rates, which one corresponds to the rate law for the reaction? \[ [A] = 0.10 \quad [D] = 0.2 \quad \text{Rate} = 0.2 \] \[ [A] = 0.2 \quad [D] = 0.2 \quad \text{Rate} = 0.4 \] \[ [A] = 0.10 \quad [D] = 0.1 \quad \text{Rate} = 0.05 \]
Friedel Craft's reaction is an example of:
Pressure of pure benzene is 0.75. When 0.2g of a non-volatile solute is added to 39g of benzene, pressure changes to 0.745. The molar mass of solute is?
Which of the following is an ambidentate ligand? a) \( \text{C}_2 \text{O}_4^{2-} \) b) \( \text{CN}^- \) c) \( \text{NH}_3 \)
What is the de Broglie wavelength of the particle having kinetic energy of $ 2E $?
Write the product of the reaction: $ \text{CH}_3 \text{CH}_2 \text{CH}_2 \text{O} \text{Na} + \text{C}_6 \text{H}_5 \text{Br} \to ? $