North Bengal Science Centre, Siliguri, West Bengal, India National Council of Science Museums, Government of India Thermochromism is the reversible colour change of a compound when it is heated or cooled. The thermochromic colour change is distinguished by being quite noticeable, often dramatic and occurring over a small or sharp time interval. It is one of the important phenomena as it has bright future for industrial and practical use. North Bengal Science Centre regularly conducts Liquid

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... ogen Show to show the behavior of materials at low temperature to the visitors. During this time it is observed that ammonium dichromate shows thermochromism in liquid nitrogen.