Question

If a test tube becomes cold to the touch during a chemical reaction the reaction is

Answer 1

Hey mate!!!

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If the test tube becomes cold to touch during a chemical reaction, the reaction is ENDO- THERMIC i.e. it absorbs heat from its surroundings.

EG - Synthesis of Ammonia is an endothermic reaction. Hydrogen and Nitrogen combines to form Ammonia .

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Hope this helps mate!!!