Which comparison is correct?
HF is a stronger acid than HCl.
H2S is a stronger acid than HCl.
NH3 is a stronger acid than HF.
PH3 is a stronger acid than NH3.
None of the comparisons are correct.
HF is a weaker acid than HCl, as HCl fully ionizes in water while HF only partially ionizes.
H2S is a weaker acid than HCl, as H2S is a weak acid that partially ionizes in water.
NH3 is not an acid, but rather a base. It can act as a weak base in water.
PH3 is not an acid, but rather a weak base. It can act as a Lewis base by donating its lone pair of electrons.