These hydrides have points of similarity as well as difference.
Points of Similarity:
Property
Water, H2O
Hydrogen Sulfide, H2S
Nature
Water is a covalent compound but has a polar character.
Hydrogen sulfide is also a covalent compound having a polar character.
Structure
Water is a bent molecule having V-shape.
Hydrogen sulfide is also a bent molecule having V-shape.
Points of Differences:
Property
Water, H2O
Hydrogen Sulfide, H2S
Physical State
It is a colourless liquid at room temperature.
It is a colourless gas at room temperature.
Smell
It has no smell.
It has a smell like that of rotten eggs.
Action of Litmus Paper
It has no action on litmus paper and is neutral.
It is acidic in nature and turns blue litmus paper red.
Action of Alkalis
It has no action on alkalis.
It reacts with alkalis to form the sulfides.
Action of Metal Ions
It does not react with metal ions.
It reacts with metal ions to give coloured precipitates of metal sulfides.
Reducing Property
Water is not a reducing agent.
Hydrogen sulfide is a strong reducing agent.
Action of Lead Acetate Solution
It remains unaffected in water.
The solution turns black.
Water is a liquid at room temperature while hydrogen sulfide is a gas at room temperature. The reason is that water molecules are associated with hydrogen bonding. The high electronegativity of oxygen and its small size makes the water more polar than hydrogen sulfide. This results in a close approach of water molecules through hydrogen bonding.
Comments (No)