Hydrogen sulphide burns in Cloze (1): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDNkJXUwMDFkJXUwMDFiJXUwMDA2JXUwMDE2JXUwMDAw air with a blue flame to form sulphur(IV)oxide gas and Cloze (2): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDJmJXUwMDE2JXUwMDE1JXUwMDExJXUwMDE3 .

Hydrogen sulphide burns in limited air with a Cloze (3): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDNhJXUwMDBlJXUwMDE5JXUwMDEw flame to form Cloze (4): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDJiJXUwMDA2JXUwMDE5JXUwMDFjJXUwMDE4JXUwMDFkJXUwMDA3 solid and water.

When hydrogen sulphide is bubbled in a metallic salt solution, a metallic Cloze (5): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDJiJXUwMDA2JXUwMDE5JXUwMDFjJXUwMDE4JXUwMDAxJXUwMDBkJXUwMDAx is formed.

All sulphides are insoluble Cloze (6): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDNhJXUwMDBlJXUwMDBkJXUwMDAyJXUwMDA4 salts except sodium sulphide, potassium sulphide and ammonium sulphides.

Hydrogen sulphide gas Cloze (7): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDNhJXUwMDBlJXUwMDBkJXUwMDAyJXUwMDA4JXUwMDBlJXUwMDBiJXUwMDFk moist Lead (II) ethanoate /Lead (II) nitrate(V) paper .

Hydrogen sulphide is a Cloze (8): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDNiJXUwMDBjJXUwMDAzJXUwMDAzJXUwMDFhJXUwMDA3JXUwMDFlJXUwMDA5JXUwMDE2JXUwMDAw gas with characteristic Cloze (9): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDI4JXUwMDA1JXUwMDFiJXUwMDA5JXUwMDAyJXUwMDBiJXUwMDFh poisonous smell of rotten eggs. It is soluble in cold water but insoluble in warm water. It is denser than water and turns blue litmus paper red.

Hydrogen sulphide gas Cloze (10): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDJhJXUwMDE3JXUwMDAxJXUwMDExJXUwMDE2JXUwMDA2JXUwMDE2 acidified potassium dichromate(VI) from orange Cr2O72- ions to Cloze (11): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDNmJXUwMDE1JXUwMDE3JXUwMDAwJXUwMDBi Cr3+ ionsleaving a  Cloze (12): waterblackensbluecolourlessexcessreducesyellowsulphidegreenblackpungentsulphur JXUwMDIxJXUwMDFjJXUwMDA5JXUwMDAwJXUwMDAzJXUwMDE4 solid residue as itself is oxidized to sulphur.