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प्रश्न
Write the formula of the following compound:
Copper [II] sulphide
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उत्तर
Copper [II] sulphide - CuS - `"Cu"^(2+)"S"^(2-)`
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संबंधित प्रश्न
What is meant by a chemical formula ? Write the formulae of one element and one compound.
An element Z has a valency of 3. What is the formula of oxide of Z ?
(a) Write the symbols/formulae of two simple ions and two compound ions (or polyatomic ions).
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its iodide ?
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its phosphate ?
Give the formula and valency of:
chromate ………….…….. .
Identify the following substance:
An alkaline gas A which gives dense white fumes with hydrogen chloride.
Write the formula of the following compound:
Potassium iodide
Write the formula of the following compound:
Sodium dichromate
Write the formula of the following compound:
Sodium aluminate
Write the formula of the following compound:
Sodium hydroxide
Write the formula of the following compound:
Sodium iodide
Write the formula of the following compound:
Sodium nitrite
Write the formula of the following compound:
Zinc carbonate
Write the formula of the following compound:
Aluminium hydroxide
Write the formula of the following compound:
Copper [II] oxide
Write the formula of the following compound:
Tetra amine copper [II] sulphate
Write the formula of the following compound:
Lead [II] chloride
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.
