Whose solubility increases with increase in temperature? Solubility of which among the following substances in water increases slightly with rise in temperature?
(a)$\ce{KBr}$
(b)$\ce{KCl}$
(c)$\ce{KNO3}$
(d)$\ce{NaNO3}$

Answer is (b).
I don't know why.
According to me if temperature is increased then Bonds between any of these four must be broken due to supplied energy &amp; solubility must decrease. And what about the other three. Do they too also show the same trend.
All four substances have higher solubility at higher temperatures in the range from 0 to 100 degrees Celsius.

$\ce{KBr}$ and $\ce{KCl}$ both roughly double their solubility from 0 to 100 degrees Celsius.

To me the question does not make sense.