Q.

When magnesium reacts with dilute HCl, the gas formed is:

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a

hydrogen

b

chlorine

c

nitrogen

d

hydrogen chloride 

answer is B.

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Detailed Solution

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  • When a metal reacts with acid then salt and Hydrogen gas are produced.
  • When magnesium reacts with dilute Hydrochloric acid, Magnesium chloride salt and hydrogen gas are produced.

                             Mg+2HCl→MgCl2​+H2​

Hence, when magnesium reacts with dilute HCl, the gas formed is Hydrogen gas.

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