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प्रश्न
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उत्तर
Potassium nitrate - KNO3 - `"K"^1"NO"_3^(1-)`
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संबंधित प्रश्न
What do the following abbreviations stand for ?
- O
- 2O
- O2
- 3O2
What do the symbols, H2, S and O4 mean in the formula H2SO4 ?
Name the element in the compound and give the formula of the following compound:
Green vitriol
Write the formula of the following compound:
Potassium plumbite
Write the formula of the following compound:
Sodium sulphite
Write the formula of the following compound:
Aluminium carbonate
Write the formula of the following compound:
Copper [II] oxide
Write the formula of the following compound:
Copper [II] sulphide
Write the formula of the following compound:
Iron [II] chloride
Write the formula of the following compound:
Iron [III] chloride
Write the formula of the following compound:
Iron [III] sulphide
Write the formula of the following compound:
Lead [II] hydroxide
Write the formula of the following compound:
Diamine silver chloride
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaZnO2
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KCr2O7
What do you understand by chemical formula of a compound? What is its significance?
Find the valency of the element which is underlined in the following formula.
- NaCl
- CO2
- Al (PO4)
- Ba (NO3)2
- CaCl2
There is ______ oxygen atom is water molecule.
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
