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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?
उत्तर
Hydrogen gas. When red litmus is introduced in the solution, it turns blue.
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संबंधित प्रश्न
From the knowledge of activity series, name a metal which shows the following properties:
It forms a base which is insoluble in water.
Complete the following word equation:
Calcium + water → calcium hydroxide + _________
Hydrogen can be prepared with the metal zinc by using:
acid
Give an equation.
Thin strips of magnesium, copper, and iron are taken.
Arrange these metals in descending order of reactivity.
Which metal is preferred for collecting hydrogen from:
Write the balanced equation
Hot water
Based on the reactions of water on metals, arrange the following metals in increasing order of reactivity: iron, sodium, magnesium, zinc, calcium
Metal in the powdered form reacts very slowly with boiling water, but it decomposes in steam. Name the metal.
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.
Name the following.
The salt formed when aluminium reacts with potassium hydroxide, during the preparation of hydrogen from alkalis.
