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प्रश्न
Give reason for the following:
Helium replaced hydrogen in weather observation balloons?
उत्तर
If there is small leakage of hydrogen in a balloon, it forms a mixture with air that can explode. So helium has replaced hydrogen.
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संबंधित प्रश्न
Give a balanced chemical equation for the reaction.
Multiple Choice Question
Hydrogen is responsible for producing
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen does not support combustion.
Match the statements in List I with the appropriate answer in List II.
| List I | List II |
| 1. An atom of hydrogen | A: Chromic oxide |
| 2. A strong oxidising agent | B: Ammonia |
| 3. A promoter used in Bosch process | C: Iron |
| 4. A chemical used in the manufavture of fertilizers | D: One electron |
| 5. The catalyst used in production of a basic gas from nitrogen. | E: Dilute nitric acid |
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Two jars of H2 are collected – “one burns quietly and the other does not”.
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Give balanced equation for obtaining hydrogen from cold water using a monovalent active metal.
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
Give a reason for the following.
A mixture of hydrogen and chlorine can be separated by passage through a porous pot.
