Question -
Answer -
H2O has oxygen as the central atom. Oxygen hassmaller size and higher electronegativity as compared to sulphur. Therefore,there is extensive hydrogen bonding in H2O, which is absent in H2S. Molecules of H2S are held together only by weak van der Waal’sforces of attraction.
Hence, H2Oexists as a liquid while H2Sas a gas.