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Which gas is usually liberated when an acid reacts with a metal ? Illustrate with an example . How will you test the presence of this gas ? |
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Answer» Solution :When a metal reacts with an acid , usually hydrogen gas is liberated . For example , zinc reacts with dilute sulphuric acid as follows : `UNDERSET("Zinc")(ZN)+underset("Sulphuric acid")(H_2SO_4)rarrunderset("Zinc sulphate")(ZnSO_4)+underset("Hydrogen")(H_2)` The hydrogen evolved can be TESTED by passing the gas through SOAP solution and then bringing a burningcandle near the soap bubble filled with the gas. The soap bubble BURSTS and the hydrogen gas burns with a pop sound. |
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