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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
Which test should be made before collecting hydrogen in a gas jar?
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with:
A divalent metal
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Complete and balance the following reaction.
Mg + H2O →_____________ +___________
Complete and balance the following reaction.
Al + KOH + H2O→_____________ +___________
Select the correct options for the following statement:
The metal used as a catalyst in hydrogenation of oils.
Select the correct options for the following statement:
The acid _____ is not Used in the laboratory preparation of hydrogen, using zinc and an acid.
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Zinc - Zn + 2HCl → ______ + _______ [g]
State the electronic configuration of hydrogen [at. no. 1].e
Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table.
State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen sulphide
