Question

gas is evolved during some chemical reaction using a conical flask

Answer 1

Dilute sulphuric acid reacts with zinc to evolve hydrogen gas This chemical reaction can be performed in the laboratory as follows: i) Take some zinc granules in a conical flask(or a test–tube). ... iv) If we touch the conical flask with our hand, we can feel a sense of hotness as there is a rise in temperature. A gas evolution reaction is a chemical reaction in which one of the end products is a gas such as oxygen or carbon dioxide. Gas evolution reactions may be carried out in a fume chamber when the gases produced are poisonous when inhaled or are explosive

Answer 2

Explanation:

Hydrogen gas is evolved and it can be observed by bring the burning candle near to tge flask it will make a pop sound and burn.

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