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प्रश्न
Give the importance of the following for living beings:
Hydrogen
उत्तर
- It is an essential part of organic compounds.
- It is used in the hydrogenation of vegetable oils to make ghee.
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संबंधित प्रश्न
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Give the effect of heat on their ?
oxides
`MnO_2 + 4Al` 
…………….
`ZnCO_3`
..............................
`2Pb(NO3)_2`
.........................
The following is a sketch of an electrolytic cell used in the extraction of aluminium :
(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be continuously replaced?
What do you observe when hydrogen is passed over heated copper oxide?
In Wilfley table method to separate particles of gangue _______ method is used.
The chemical formula of zinc blend is _______.
Identify the following method of concentration of ores and explain briefly.
In leaching of alumina from bauxite by Bayer's process, then ore is treated with ______.
