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प्रश्न
Name two alkalies that can displace hydrogen. Give balanced equations for the same. Why are the metals you have used considered to have a unique nature?
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उत्तर
NaOH and KOH
Zn + 2NaOH → Na2ZnO2 + H2
Zn + 2KOH → K2ZnO2 + H2
Metals such as zinc, lead, and aluminium have a unique nature. They react with acids and can even react with hot alkalis to form hydrogen and soluble salt.
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संबंधित प्रश्न
From the knowledge of activity series, name a metal which shows the following properties:
It displaces hydrogen from hot water.
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Hot water
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- dilute sulphuric acid
- dilute hydrochloric acid
Write equations using zinc and iron.
Why does copper not show similar behavior?
Give reason for the following:
Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.
Metal in the powdered form reacts very slowly with boiling water, but it decomposes in steam. Name the metal.
Write a balanced equation for the reaction named metal with (i) boiling water (ii) steam.
Select the odd one out and justify your answer.
Zn, Fe, Mg, and Na
Name the following.
A metal which cannot be used for the preparation of hydrogen using dilute acids.
