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प्रश्न
State four uses of hydrogen:
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उत्तर
- Hydrogen with oxygen produce oxy-hydrogen flame which is used for cutting and welding.
- Hydrogen gas is used as a fuel.
- Hydrogen is used for hydrogenation of vegetable oil.
- Hydrogen gas is used extensively in the manufacture of ammonia gas, which is used to produce fertilizers.
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
Hydrogen gas is easily liquefiable.
MULTIPLE CHOICE QUESTIONS
Which is the lightest of all elements?
- hydrogen
- helium
- lithium
- none of these
FILL IN THE BLANK
Hydrogen is present abundantly in the ................
FILL IN THE BLANK
Ammonia is used to make ................
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen is a combustible gas.
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 a correctly balanced equation for the following “word equation”:
calcium + water → calcium hydroxide + hydrogen
Write balanced equation for the following reaction:
magnesium + dil. hydrochloric acid → ___
Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis].
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
