Identification of Gases Crossword Puzzle

QUESTIONS LIST:

• hydrogen : a gas that burns with a pop sound
• hydrogen chloride :gas that turns moist blue litmus paper red due to its acidic fumes.
• chlorine: pale green toxic gas, used for bleaching.
• sulphur dioxide: gas with a sharp smell, causes acid rain.
• nitrogen dioxide: brown toxic gas contributing to smog and acid rain
• oxygen : essential for combustion and life
• carbon dioxide: gas exhaled by humans and animals.
• hydrogen sulphide: rotten egg-smelling toxic gas.
• ammonia: sharp-smelling gas used in household cleaners.
• water: liquid vital for life, formed by burning hydrogen.