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प्रश्न
Give a balanced equation for the following conversion.
\[\ce{KAlO2<-KOH->K2ZnO2}\]
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उत्तर
\[\ce{2Al + 2KOH + 2H2O->2KAlO2 + 3H2}\]
\[\ce{Zn + 2KOH->K2ZnO2 + H2}\]
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संबंधित प्रश्न
Match the statements in Column A with those in Column B.
| Column A | Column B |
|
1. A metal which reacts with cold water to from hydrogen. |
1. Reduction |
| 2. A gas which is inflammable and non-supporter of combustion | 2. Hydrogenation |
|
3. A process in which vanspati ghee is prepared from vegitable oils |
3. oxidation |
|
4. The removal ofhydrogen or addition of oxygen |
4. sodium |
| 5. The addition of hydrogen or removal of oxygen | 5. Hydrogen |
Why nitric acid is not used in the preparation of hydrogen?
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
Complete and balance the following reaction.
Zn + H2O →_____________ +___________
Starting from hydrogen gas how would you obtain a metal by reduction of its heated oxide.
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.
A white substance which leaves an amphoteric oxide as a residue [whose colour varies in the heated and in the cold state] and evolves a gas which turns lime water milky.
Complete and balance the equation:
[General method]
Reactions of metals with steam
Iron - 3Fe + 4H2O ⇌ ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Magnesium - Mg + 2HCl → ______+ _______ [g]
State the reactant added to hydrogen to obtain the respective product in following case.
Ammonia
