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प्रश्न
State why hydrogen is not prepared in the laboratory by the action of calcium with dilute sulphuric acid.
उत्तर
It is not possible to produce hydrogen in a laboratory by reacting calcium with diluted sulfuric acid since the reaction is extremely explosive and practically impossible.
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संबंधित प्रश्न
Hydrogen can be prepared with the metal zinc by using: alkali
Give an equation.
Give an equation to express the reaction between:
Steam and red hot iron
Give an equation to express the reaction between:
Calcium and water
A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed.
Name the gas formed in the reaction. How would you test the gas?
A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed.
What do you observe when a few drops of red litmus solution are added to the turbid solution.
Thin strips of magnesium, copper, and iron are taken.
Write down what happens when these metals are treated as follows:
- Heated in presence of air
- Heated with dil.HCl
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What do you observe when hydrogen gas is passed through a soap solution?
Select the odd one out and justify your answer.
Fe, Zn, Cu and Mg
Which of the following metals does not give hydrogen with acids?
Using dilute sulphuric acid how would you differentiate between:
Sodium sulphide and sodium carbonate.
How would you identify the gaseous products evolved.
