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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
Choose the correct option:
Hydrogen is evolved by the action of cold dil. HNO3 on
Which metal is preferred for collecting hydrogen from Cold water? Write the balanced equation.
Which metal is preferred for collecting hydrogen from:
Write the balanced equation
Hot water
Which metal is preferred for collecting hydrogen from steam? Write the balanced equation for the case.
Metal in the powdered form reacts very slowly with boiling water, but it decomposes in steam. Name the metal.
When hydrogen is passed over a black solid compound A, the products are a 'colorless liquid' and a 'reddish-brown metal B'.
Substance B is divided into two parts each placed in separate test tubes.
Dilute HCl is added to one part of substance B and dilute HNO3 to the other.
- Name the substances A and B.
- Give two tests for the colourless liquid formed in the experiment.
- What happens to substance A when it reacts with hydrogen? Give reasons for your answer.
- Write an equation for the reaction between hydrogen and substance A.
- Is there any reaction between substance B and dilute hydrochloric acid? Give reasons for your answer.
Select the odd one out and justify your answer.
Fe, Zn, Cu and Mg
Which metal gives hydrogen with all of the following: water, acids, alkalis?
Choose terms from the options given in brackets to complete this sentence.
Sodium ………………. reacts smoothly with cold water.
(metal, amalgam, in the molten state)
Using dilute sulphuric acid how would you differentiate between:
Copper and magnesium
How would you identify the gaseous products evolved.
