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प्रश्न
Give the formula of the following gas:
Nitrogen
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उत्तर
Nitrogen – N2
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संबंधित प्रश्न
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Magnetic separation
What do the following symbol stand for?
H
Match the formulas of the following of acids with their correct names:
Acids – (a) HCI (b) HNO3 (c) H2SO4 (d) H2CO3
Names – (1) Carbonic acid (2) Sulphuric acid (3) Hydrochloric acid (4) Nitric acid
Give the symbol of the following element:
Calcium
Write the radical of the following valency:
Chlorine [Chloride]
Write the radical of the following valency:
Zinc
State the valency of the following metallic element and write symbol with the valency
Zinc
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Lead
write symbol with the variable valency
What does the symbol '→' present in a chemical equation, mean?
Define Alchemy.
