Chemistry - Complete d-block Question with Solution | TestHub

ChemistryComplete d-blockd-blockEasy2 minPYQ_2019
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The metal that gives hydrogen gas upon treatment with both the acid as well as the base is

Options:

Answer:
A
Solution:

(i) Mg+HCl→MgCl2+H2↑    Mg+NaOH→OH2+Na
(ii) Fe+HCl→FeCl3+H2↑   Fe+2OH-→FeOH2+2Na
(iii) Zn is amphoteric in nature, so it reacts with acid as well as base.
Zn+HCl→ZnCl2+12H2g↑Zn+NaOH→ZnO2-2+H2g↑
(iv)
Hg+NaOH→Hg+HgO+H2OHg+2HCl→Hg2Cl2+H2(g)

Stream:JEESubject:ChemistryTopic:Complete d-blockSubtopic:d-block
⏱ 2mℹ️ Source: PYQ_2019

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