Which of the following pairs are opposing terms? superior/posterior superior/inferior anterior/inferior superior/anterior

Superior means anything which is higher in rank , status or quality among similar other things or people.

Posterior means something which is at back.

Inferior means anything which is lower in rank , status or quality among similar other things or people.

Anterior means something which is nearer to the front.

∴ Pair of opposite terms is: Superior/inferior

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

the answer is d.) potassium