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प्रश्न
Give the formula of the following gas:
Nitrogen dioxide
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उत्तर
Nitrogen dioxide – NO2
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संबंधित प्रश्न
What do you understand by :
Noble gases
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
If the symbol for Cobalt, Co, were written as CO, what would be wrong with it?
In the chemical word equation – Zinc + Sulphuric acid → Zinc sulphate + Hydrogen
The molecular equation is :
Zn + H2SO4 → ZnSO4 + H2[g].
State what [g] represents.
Give the symbol of the following element:
Hydroxide
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Mercury
write symbol with the variable valency
State why the molecular formula of zinc carbonate is ZnCO3 .
What does the symbol '(aq.)' present in a chemical equation, mean?
Name the elements with the following symbols.
- Na
- W
- Ba
- Al
- U
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
