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प्रश्न
Using dilute sulphuric acid how would you differentiate between:
Copper and magnesium
How would you identify the gaseous products evolved.
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उत्तर
Action of dil. H2SO4 on
Copper — has no action
Magnesium — produces H2 burns with blue flame with pop-sound.
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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 + _________
Hydrogen can be prepared with the metal zinc by using: alkali
Give an equation.
Thin strips of magnesium, copper, and iron are taken.
Arrange these metals in descending order of reactivity.
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.
Give a reason for the following.
Hydrogen is collected by the downward displacement of water and not of air, even though it is lighter than air.
Select the odd one out and justify your answer.
Fe, Zn, Cu and Mg
Helium is preferred to hydrogen for filling balloons because it is:
Which of the following metals does not give hydrogen with acids?
Correct the following statement:
Conc. H2SO4 reacts with zinc to liberate hydrogen.
