MDCAT Chemistry MCQs

Atomic orbitals and electron-pair repulsions determine bonding and molecular shape.
The stated option follows the relevant electronic or VSEPR rule.

Atomic orbitals and electron-pair repulsions determine bonding and molecular shape.
The stated option follows the relevant electronic or VSEPR rule.

For standard reduction potentials, E°cell = E°cathode − E°anode.
The positive result indicates a spontaneous standard cell reaction.

For standard reduction potentials, E°cell = E°cathode − E°anode.
The positive result indicates a spontaneous standard cell reaction.

Oxidation and reduction occur at separate electrodes in a galvanic cell.
Electron and ion movement complete the circuit.

Oxidation and reduction occur at separate electrodes in a galvanic cell.
Electron and ion movement complete the circuit.

Oxidation and reduction occur at separate electrodes in a galvanic cell.
Electron and ion movement complete the circuit.

The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.

The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.

The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.

The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.

Oxidation numbers sum to the overall charge of the species.
Applying standard rules gives the stated value.