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प्रश्न
Write the formula of the following compound:
Sodium hydroxide
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उत्तर
Sodium hydroxide - NaOH - `["OH"]^(1-)`
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संबंधित प्रश्न
Write down the formulae of sodium sulphide.
Name the following compounds. Also write the symbols/formulae of the ions present in them :
- CuSO4
- (NH4)2SO4
- Na2O
- Na2CO3
- CaCl2
Correct the following statement:
A molecular formula represents an element.
Identify the following substance:
An alkaline gas A which gives dense white fumes with hydrogen chloride.
Write the formula of the following compound:
Potassium plumbite
Write the formula of the following compound:
Potassium bicarbonate
Write the formula of the following compound:
Potassium bisulphite
Write the formula of the following compound:
Sodium carbonate
Write the formula of the following compound:
Sodium permanganate
Write the formula of the following compound:
Sodium sulphate
Write the formula of the following compound:
Calcium sulphate
Write the formula of the following compound:
Zinc oxide
Write the formula of the following compound:
Aluminium oxide
Define the term Relative atomic mass. State why indirect methods are utilised to determine the absolute mass of an atom. Explain in brief the indirect method used.
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
Mg(SO4)2
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaClO
Find the valency of the element which is underlined in the following formula.
- NaCl
- CO2
- Al (PO4)
- Ba (NO3)2
- CaCl2
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.
