(8 points) Xinhua Photo News: A tank filled with liquid chlorine (chemical formula Cl 2, relative molecular weight 7 1) was seriously overloaded in the Gonghuai 'an section of Beijing-Shanghai expressway. ( 1)Volatile( 1)； Corrosiveness (or other reasonable answers, such as density greater than air, ability to react with alkali and solubility in water) (1)

(2)B( 1), alcohol lamp (1), concentrated sulfuric acid (1); Exhaust air (1 min) and sodium hydroxide (or other reasonable reagents) upwards (1 min).

(3) Escape against the wind (or cover your nose and mouth with a wet towel to escape) (1)

This topic examines the essence of matter, the preparation and purification of gas, and is more comprehensive.