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प्रश्न
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?
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उत्तर
Hydrogen gas. When red litmus is introduced in the solution, it turns blue.
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संबंधित प्रश्न
Hydrogen can be prepared with the metal zinc by using:
acid
Give an equation.
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
Which metal is preferred for collecting hydrogen from Cold water? Write the balanced equation.
Based on the reactions of water on metals, arrange the following metals in increasing order of reactivity: iron, sodium, magnesium, zinc, calcium
Which metal gives hydrogen with all of the following: water, acids, alkalis?
What do you observe when dilute sulphuric acid is added to Zinc granules.
Using dilute sulphuric acid how would you differentiate between:
Sodium sulphide and sodium carbonate.
How would you identify the gaseous products evolved.
State why hydrogen is not prepared in the laboratory by the action of lead with dilute hydrochloric acid.
Name the following.
The salt formed when aluminium reacts with potassium hydroxide, during the preparation of hydrogen from alkalis.
