Answer : The correct option is, (a)
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, is an acid that donate a proton or hydrogen to base and it forms and are conjugate base and acid respectively.
Thus, is act as Brønsted-Lowry acid.
(b) The equilibrium reaction will be,
In this reaction, is an acid that donate a proton or hydrogen to base and it forms and are conjugate acid and base respectively.
Thus, is act as Brønsted-Lowry base.
(c) The equilibrium reaction will be,
In this reaction, is an acid that donate a proton or hydrogen to base and it forms and are conjugate acid and base respectively.
Thus, is act as Brønsted-Lowry base.
(d) The equilibrium reaction will be,
In this reaction, is an acid that donate a proton or hydrogen to base and it forms and are conjugate acid and base respectively.
Thus, is act as Brønsted-Lowry base.
(c) The equilibrium reaction will be,
In this reaction, is an acid that donate a proton or hydrogen to base and it forms and are conjugate acid and base respectively.
Thus, is act as Brønsted-Lowry base.
From this we conclude that that, species could not react as a Brønsted-Lowry base.
Hence, the correct option is, (a)