Which of the following is not an acid-base conjugate pair?
a. nh4+ and nh3
b. h2o and oh-
c. h2s and oh-
d. h2co3 and hco3-
e. none of the above

Answer : The option (c) does not show an acid-base conjugate pair.

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.

(a) The equilibrium reaction will be,

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

(b) The equilibrium reaction will be,

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

(c) The equilibrium reaction will be,

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

(d) The equilibrium reaction will be,

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

Hence, from this we conclude that, the option (c) does not show an acid-base conjugate pair.

10 years is the answer

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