Question

A reversible reaction

A) always starts in equilibrium
B) always starts off in the reverse direction
C) always starts off in the forward direction
D) always starts as a product and reacts to form reactions

Answer 1

A reversible reaction is a reaction where the reactants form products, which react together to give the reactants back. A and B can react to form C and D or, in the reverse reaction, C and D can react to form A and B. This is distinct from reversible process in thermodynamics.

Answer 2

A

Step-by-step explanation:

A reversible reaction is a reaction in which under certain conditions, the product and reactant are in equilibrium with each other. Normal reactions starts with the reactant breaking bonds to have an unstable intermediate before producing the products. While in reversible reactions, the intermediate are usually a complex of both the product and reactant. Under a certain condition eg increase in pressure, the forward will be favoured or decrease in concentration of the reactant will favor the forward reaction while increasing it favor the backward reaction.

aA + bB ⇄ cC + dD

The above expression is an example of reversible reaction. (A and B) are both reactant while (C and D) are the products. However under normal conditions, they're at equilibrium with each other I.e the concentration of the reactant and products are equal.