The critical temperature is the temperature above which a gas cannot be liquefied, regardless of the pressure applied.

The critical temperature is the temperature above which a gas cannot be liquefied.

-NO2 is a strong electron-withdrawing group and destabilizes benzene derivatives.

-CF3 is a strong electron-withdrawing group, which destabilizes the benzene ring.

The -CH3 group is an electron-donating group and stabilizes the carbocation through hyperconjugation.

The -COOH group is a strong electron-withdrawing group, thus it destabilizes the benzene ring.

A -I group increases the acidity of a carboxylic acid by stabilizing the negative charge on the conjugate base.

A -I group increases the acidity of carboxylic acids by stabilizing the negative charge on the conjugate base.

The -NO2 group is a strong electron-withdrawing group, which destabilizes the benzene ring.

A catalyst does not affect the equilibrium constant; it only speeds up the rate at which equilibrium is reached.

A catalyst does not affect the position of equilibrium; it only speeds up the rate at which equilibrium is reached.

The addition of a non-volatile solute raises the boiling point of the solvent, a phenomenon known as boiling point elevation.

A catalyst speeds up the rate of both the forward and reverse reactions equally, thus having no effect on the position of equilibrium.

A catalyst increases the rate of both the forward and reverse reactions equally, thus it does not shift the position of equilibrium.

Adding a common ion decreases the solubility of a salt in a saturated solution due to the common ion effect.

Adding a non-volatile solute decreases the vapor pressure of the solvent due to the reduction in the mole fraction of the solvent.

Adding a solute to a solvent increases the boiling point of the solution, a phenomenon known as boiling point elevation.

A buffer solution is designed to resist changes in pH, so adding a strong acid will cause only a small change in pH.

Adding a strong base to a buffer solution will increase the pH, but the buffer will resist significant changes in pH due to the presence of the weak acid.

Adding an inert gas at constant volume does not change the partial pressures of the reactants or products, hence no effect on equilibrium.

Adding an inert gas at constant volume does not change the partial pressures of the reactants and products, so the equilibrium position remains unchanged.

Adding an inert gas at constant volume does not change the partial pressures of the reactants and products, thus it has no effect on the equilibrium position.

Alkyl groups increase the basicity of amines due to their electron-donating effect.

Deforestation increases CO2 levels in the atmosphere as fewer trees are available to absorb carbon dioxide.

Diluting a strong acid decreases its concentration, which increases the pH (making it less acidic).

Dilution of a strong acid decreases its concentration, thus increasing the pH.

Dilution of a weak acid decreases its concentration, which shifts the equilibrium to the right, increasing the concentration of H+ ions and thus increasing the pH.

Electron-donating groups increase the electron density on the nitrogen atom, thus increasing the basicity of amines.

Electron-withdrawing groups decrease the basicity of amines by reducing the electron density on the nitrogen atom.

Increasing electronegativity difference between two atoms leads to an increase in ionic character of the bond.