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प्रश्न
How did the name ‘hydrogen’ originate? How does hydrogen occur in the combined state?
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उत्तर
At first, hydrogen was referred to as an "inflammable gas." It burned in the atmosphere, creating water. Lavoisier gave it the name "hydrogen," which means "water producer," in 1783. [Greek word Hydro = water, gen = producer]
Hydrogen occurs in the combined state:
- Compounds containing hydrogen, along with carbon, oxygen, and nitrogen, make up plant and animal tissues.
- Hydrogen makes up around one-ninth of the mass of water.
- as an ingredient in various substances, such as organic compounds, petroleum products, acids, and alkalis.
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संबंधित प्रश्न
Match the statements in Column A with those in Column B.
| Column A | Column B |
|
1. A metal which reacts with cold water to from hydrogen. |
1. Reduction |
| 2. A gas which is inflammable and non-supporter of combustion | 2. Hydrogenation |
|
3. A process in which vanspati ghee is prepared from vegitable oils |
3. oxidation |
|
4. The removal ofhydrogen or addition of oxygen |
4. sodium |
| 5. The addition of hydrogen or removal of oxygen | 5. Hydrogen |
Multiple Choice Question
Water gas is a mixture of
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with:
A monovalent metal
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
Complete and balance the following reaction.
Zn + HCl →_____________ +___________
Select the correct options for the following statement:
The metal which reacts with steam liberating hydrogen & the reaction is reversible.
Select the correct options for the following statement:
The product formed on combustion of hydrogen in air is ___.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
An efflorescent substance which leaves a residue having the same colour as the substance and evolves a gas which changes the colour of cobalt chloride paper.
State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen chloride
