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प्रश्न
Select the correct options for the following statement:
The gas which has now replaced hydrogen in air balloons is ___.
विकल्प
argon
helium
neon
उत्तर
The gas which has now replaced hydrogen in air balloons is helium.
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
The hydrogen molecule is monovalent.
Indicate which of the following statement is true and which is false:
Hydrogen gas is easily liquefiable.
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:
Sodium with cold water
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 |
How can you obtain hydrogen from sodium hydroxide [not by electrolysis].
How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis?
Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
