In a zero-order reaction, the rate is constant and does not depend on the concentration of reactants.

For a zero-order reaction, time = (initial concentration - final concentration) / k = (2 - 0) / 5 = 0.4 s.

In a zero-order reaction, the rate of reaction is independent of the concentration of reactants.

In an endothermic reaction, the enthalpy of the products is higher than that of the reactants.

In an ideal solution, the enthalpy of mixing is zero, indicating no heat is absorbed or released during mixing.

In an irreversible process, the change in entropy of the universe is positive, indicating that the total entropy increases.

In an isothermal process, the work done by the gas is given by W = nRT ln(Vf/Vi).

Reduction refers to the gain of electrons in a chemical reaction.

In O2, the π2p orbitals are the highest energy orbitals.

The energy levels of molecular orbitals can vary depending on the specific atoms and their electronegativities.

Nickel in [Ni(CO)4] undergoes sp3 hybridization as it forms four sigma bonds with CO ligands.

Saturation refers to the complete coverage of the adsorbent surface by the adsorbate.

The equilibrium constant Kc is dimensionless because it is a ratio of concentrations raised to their stoichiometric coefficients.

Removing SO3 will shift the equilibrium to the right to produce more SO3.

In the Freundlich isotherm, K is the adsorption coefficient that indicates the extent of adsorption.

'n' represents the number of moles of the gas in the ideal gas equation.

The Langmuir isotherm assumes that all adsorption sites are identical and have the same energy.

'b' in the Langmuir isotherm represents the equilibrium constant related to the adsorption process.

In N2, the 2s orbitals (σ2s and σ*2s) are filled before the 2p orbitals.

π molecular orbitals can accommodate a maximum of 2 electrons, similar to all molecular orbitals.

The 2s molecular orbitals are lower in energy than the 2p molecular orbitals.

The σ2s orbital is lower in energy than the π2p and σ2p orbitals in homonuclear diatomic molecules.

The highest energy orbital in O2 is σ*2p, which is an antibonding orbital.

In O2, the highest occupied molecular orbital (HOMO) is π2p.

s and s orbitals can combine to form a sigma bond.

Sigma bonds are formed by the head-on overlap of s and p orbitals.

Zinc (Zn) is oxidized to Zn2+.

Ag+ is reduced as it gains electrons to form Ag.

In AgNO3, silver has an oxidation state of +1.

Zinc is oxidized from an oxidation state of 0 to +2.