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प्रश्न
Write the formula of the following compound:
Aluminium hydroxide
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उत्तर
Aluminium hydroxide - Al[OH]3 - `"Al"^(3+)["OH"]^(1-)`
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संबंधित प्रश्न
State the chemical symbols for the following elements :
Sodium, Potassium, Iron, Copper, Mercury, Silver.
An element Z has a valency of 3. What is the formula of oxide of Z ?
An element Y has a valency of 4. Write the formula for its :
- chloride
- oxide
- sulphate
- carbonate
- nitrate
Correct the following statement:
Formula of iron (lll) oxide is FeO.
Write the formula of the following compound:
Potassium zincate
Write the formula of the following compound:
Potassium nitrite
Write the formula of the following compound:
Sodium sulphite
Write the formula of the following compound:
Sodium permanganate
Write the formula of the following compound:
Sodium aluminate
Write the formula of the following compound:
Sodium iodide
Write the formula of the following compound:
Copper [I] chloride
Write the formula of the following compound:
Lead [II] oxide
Write the formula of the following compound:
Lead [II] hydroxide
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.
Mg(SO4)2
Find the valency of the element which is underlined in the following formula.
- NaCl
- CO2
- Al (PO4)
- Ba (NO3)2
- CaCl2
Write the molecular formulae for the following compounds
Copper (II) bromide
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).
- Ammonia
- Carbon monoxide
- (Hydrogen chloride
- Aluminium fluoride
- Magnesium sulphide
Write the steps that are followed to write down the chemical formula of a substance.
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.
