Which statement is true for most chemical reactions?
a. an energy change occurs during the breaking and forming of bonds.
b. the internal energy of the system increases during a reaction.
c. energy is released during the formation of reactants.
d. the enthalpy of the products is higher than the enthalpy of the reactants.

Option (A) is the correct answer.

Explanation:

In a chemical reaction, the bond between atoms may break or reform. As a result, the potential energy of the reaction will change.

The stronger is the bond between atoms, the more energy will release. Therefore, a chemical reaction can be exothermic or endothermic in nature.

Thus, we can conclude that an energy change occurs during the breaking and forming of bonds in chemical reactions.

The correct answer for above statement is:

An energy change occurs during the breaking and forming of bonds.

Explanation:

A chemical reaction is a method that drives to the chemical conversion of one set of chemical substances to another. Chemical reactions are normally described by a chemical change, and they yield one or more products, which normally have properties distinct from the reactants. Reactions often consist of an arrangement of individual sub-steps, the so-called primary reactions, and the information on the specific course of action is part of the reaction tool.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.