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Question
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
Options
Na, K, Li
Mg, Ca, Ba
Al, Zn, Pb
Fe, Cu, Ag
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Solution
Al, Zn, Pb
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The metal which reacts with cold water to produce hydrogen is
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Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
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State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen chloride
Give a balanced equation for the following conversion.
\[\ce{MgCl2<-HCl->FeCl2}\]
Give a balanced equation for the following conversion.
\[\ce{KAlO2<-KOH->K2ZnO2}\]
