Consider the reaction below.

h2po4– + h2o mc030-1.jpg h3o+ + hpo42–

which of the following is a base–conjugate acid pair?
h2o and h3o+
h2o and h2po4–
h2po4– and hpo42–
h2po4– and h3o+

Answer : The correct option is

Explanation :

According to the Bronsted Lowry concept, Bronsted Lowry-acid is a substance that donates one or more hydrogen ion in a reaction and Bronsted Lowry-base is a substance that accepts one or more hydrogen ion in a reaction.

Or we can say that, conjugate acid is proton donor and conjugate base is proton acceptor.

The given equilibrium reaction will be,

In this reaction, and are acid and base and and are conjugate acid and base respectively.

From this we conclude that, is a base-conjugate acid pair.

Hence, the correct option is

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)