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प्रश्न
What do you observe when hydrogen gas is passed through a soap solution?
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उत्तर
On passing hydrogen gas through soap solution, soap bubbles filled with hydrogen fly high and burst. This behavior proves that hydrogen is lighter than air.
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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 forms a base which is insoluble in 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
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?
Metal in the powdered form reacts very slowly with boiling water, but it decomposes in steam. Name the metal.
Select the odd one out and justify your answer.
Fe, Zn, Cu and Mg
Select the odd one out and justify your answer.
Fe, Pb, Al and Zn
State why hydrogen is not prepared in the laboratory by the action of calcium with dilute sulphuric acid.
Name the following.
A metal which cannot be used for the preparation of hydrogen using dilute acids.
