Which of the following elements react with dilute nitric acid to produce hydrogen gas?

Manganese

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Iron

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Copper

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Mercury

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Correct the following statements :

(a) Hydrogen is used as a fuel for rocket propulsion.

(b) All metals react with acids to give hydrogen.

(d) Very dilute nitric acid reacts with zinc to produce hydrogen.

(e) $C o n c . H_{2} S O_{4}$ reacts with zinc to liberate hydrogen.

Q. The two elements that react with very dilute nitric acid to evolve hydrogen gas are manganese and :

Q. Correct the following statements:

(d) Very dilute nitric acid reacts with iron to produce hydrogen.

Hydrogen gas is not evolved when nitric acid reacts with metals but magnesium and manganese metals react with nitric acid to produce hydrogen gas,why??HOW?

Q. why we use dilute nitric acid with manganese to form manganese nitrate and hydrogen ? Can't we use concentrated nitric acid ?

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