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प्रश्न
Hydrogen is obtained by displacement from:
- dilute sulphuric acid
- dilute hydrochloric acid
Write equations using zinc and iron.
Why does copper not show similar behavior?
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उत्तर
- Zn + H2SO4 → ZnSO4 + H2
- Fe + H2SO4 → FeSO4 + H2
Hydrogen cannot be prepared from metals which are below it in the activity series of metals such as copper because only metals that are more reactive than hydrogen can displace it from acids.
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संबंधित प्रश्न
Write a balanced equation for the following:
Iron reacts with dil. HCl
Complete the following word equation:
Calcium + water → calcium hydroxide + _________
Give an equation to express the reaction between:
Steam and red hot iron
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?
Write a balanced equation for the reaction named metal with (i) boiling water (ii) steam.
Select the odd one out and justify your answer.
SO2, H2S, NH3, and CO3
Correct the following statement:
Conc. H2SO4 reacts with zinc to liberate hydrogen.
Using dilute sulphuric acid how would you differentiate between:
Copper and magnesium
How would you identify the gaseous products evolved.
State why hydrogen is not prepared in the laboratory by the action of calcium with dilute sulphuric acid.
Name the following.
A metal which cannot be used for the preparation of hydrogen using dilute acids.
