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प्रश्न
Give the formula of the following gas:
Nitrogen dioxide
उत्तर
Nitrogen dioxide – NO2
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संबंधित प्रश्न
The symbol of a metal element which is used in making thermometers is :
Why is the symbol S for sulphur, but Na for sodium and Si for silicon?
Match the symbols of – radicals – with their correct combining power or capacity, (valency).
(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
Give the symbol of the following element:
Zinc
Give the symbol of the following element:
Bromine [bromide]
State the type of element for the following:
Lead
State the type of element for the following:
Bromine
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Chloride
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Nitride
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
