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प्रश्न
State why hydrogen is not prepared in the laboratory by the action of lead with dilute hydrochloric acid.
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उत्तर
With lead dil. HCl forms PbCl2 which is in soluble and forms coating and stops the further reaction.
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संबंधित प्रश्न
Write a balanced equation for the following:
Iron reacts with dil. HCl
From the knowledge of activity series, name a metal which shows the following properties:
It displaces hydrogen from hot water.
Hydrogen can be prepared with the metal zinc by using:
acid
Give an equation.
Based on the reactions of water on metals, arrange the following metals in increasing order of reactivity: iron, sodium, magnesium, zinc, calcium
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.
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?
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.
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:
Sodium sulphide and sodium carbonate.
How would you identify the gaseous products evolved.
