It's D ,Because
This is a neutralization reaction and ususally neautralization reactions have LOWEST conductivity which is why it decreases but then the barium hydroxide and sulfuric acid react there are ions present and hence electric conductivity increases.
Ihmm 'll confirm the answer and then get back to you
I'm sorry for taking too long , I had to call my friend for this.
Hmm it's an follows as Nobody said ;
Look, initially, you've got H2SO4(aq) giving 3 ions
now, when you add barium hydroxide, it will form a precipitate and take out all the sulphate ions in the form of BaSO4(s) and further neutralise the hydrogen ions which fill form 2H2O(l).
oaky? so, at that time,
the conductivity decreases.Now, when all the sulfuric acid is neutralized... barium ions and hydroxide ions will be generated when Ba(OH)2(aq) reacts.
which will lead to an increase in the conductivity.
My friend's/teacher's explanation ;
as bRIUM HYDROXIDE IS added it's ions eat up the acid ions. hence no ions , cuz all ions cancel each other , electrical conductivity falls to 0 ..On more addition of bariium hydroxide , OH- increases , i.e.e the -ve charge increases , hence electrical conductivity increases .
GG
