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प्रश्न
Write the formula of the following compound:
Calcium sulphate
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उत्तर
Calcium sulphate - CaSO4 - `"SO"_4^(2-)`
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संबंधित प्रश्न
Fill the following blanks with suitable words :
In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ....................
What is meant by the symbol of an element ? Explain with examples.
What do the following abbreviations stand for ?
- O
- 2O
- O2
- 3O2
Name the following compounds. Also write the symbols/formulae of the ions present in them :
- CuSO4
- (NH4)2SO4
- Na2O
- Na2CO3
- CaCl2
Define ‘formula unit’ of an ionic compound. What is the formula unit of (i) sodium chloride, and
(ii) magnesium chloride ?
Which of the following represents a correct chemical formula ?
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its nitride ?
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its phosphate ?
Give the empirical formula of Glucose C6H12O6 .
Identify the following substance:
Gas B that has an offensive smell as of rotten eggs.
Write the formula of the following compound:
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Write the formula of the following compound:
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Write the formula of the following compound:
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Write the formula of the following compound:
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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.
