Question

Valency of hydrogen is 1 and that of sulphur is 2. What should be the formula of hydrogen sulphide?

• A. HS₂
• B. H₂S₂
• C. HS
• D. H₂S

Answer 1

The correct option is C

HS

While writing the chemical formula for hydrogen sulphide, first write the constituent elements and their valencies, after this cross over the valencies of combining atoms.

Symbol: H S

Charges: +1 -2

Formula: H₂S