Question

why calcium and iron not used in the laboratory preparation of Hydrogen?​

Answer 1

Answer:

Calcium and hydrogen are not used in laboratory fo preparation of hydrogen because,To prepare hydrogen in the laboratory, metals like Na and K are not used because their reactions with mineral acids are too violent and calcium has a very uncontrollable reaction with dilute H2SO4 or dilute HCl.

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Answer 2

(a) calcium (b) iron (c) aluminium (d) sodium. ... d)Sodium again having a very uncontrollable reaction withe dilute acids cant be used as the exothermic reaction sets the hydrogen burning.

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