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प्रश्न
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
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उत्तर
Divalent active metal Ca :
Ca + 2H2O → Ca[OH]2 + H2
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संबंधित प्रश्न
Hydrogen is combustible as well as a supporter of combustion.
Give a balanced chemical equation for the reaction.
Multiple Choice Question
Hydrogen is responsible for producing
FILL IN THE BLANK
In nature, hydrogen occurs as a .................. molecule represented as H2
Write the balanced equation and give your observation when the following metal reacts:
Calcium with cold water
Write the balanced equation and give your observation when the following metal reacts:
Magnesium with boiling water
Write the balanced equation and give your observation when the following metal reacts:
Magnesium with steam
How is hydrogen separated from carbon dioxide and carbon monoxide?
Give a test to differentiate between two gas jars – one containing pure hydrogen and the other hydrogen-air mixture.
Give balanced equation for the following conversion:
Water gas to hydrogen – industrially.
Give reason for the following:
The reaction of chlorine with hydrogen sulphide is deemed a redox reaction.
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 |
Write balanced equation for the following reaction:
magnesium + dil. hydrochloric acid → ___
Describe one chemical test applied to the following gases, which would enable you to distinguish between them :‘carbon monoxide and hydrogen’.
Write down the “word equation” for the following reaction:
sodium hydroxide solution + zinc → ?
Describe briefly, with equations, the Bosch Process for the large scale production of hydrogen.
Give a reason for the following.
A mixture of hydrogen and chlorine can be separated by passage through a porous pot.
