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प्रश्न
Write the formula of the following compound:
Sodium carbonate
उत्तर
Sodium carbonate - Na2CO3 - `"Na"^(1+)["CO"_3]^(2-)`
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संबंधित प्रश्न
What is meant by the term chemical formula?
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its phosphate ?
Match the following:
| Column A | Column B |
| (a) Pb(NO3)2 | (i) rotten eggs smell |
| (b) CO2 | (ii) burns with a pop sound |
| (c) (NH4)2Cr2O7 | (iii) the suffocating smell of sulphur |
| (d) HCI | (iv) lime water turns milky |
| (e) NO2 | (v) crackling sound |
| (f) O2 | (vi) residue swells up |
| (g) H2 | (vii) brown gas |
| (i) H2S | (viii) supports combustion |
| (j) SO2 | (ix) fumes with NH3 solution |
Name the element in the compound and give the formula of the following compound:
Phosphoric acid
Write the formula of the following compound:
Potassium zincate
Write the formula of the following compound:
Potassium bicarbonate
Write the formula of the following compound:
Sodium zincate
Write the formula of the following compound:
Magnesium carbonate
Write the formula of the following compound:
Magnesium oxide
Write the formula of the following compound:
Zinc sulphate
Write the formula of the following compound:
Aluminium nitrate
Write the formula of the following compound:
Aluminium hydroxide
Write the formula of the following compound:
Copper [II] sulphate
Write the formula of the following compound:
Tetra amine copper [II] sulphate
Write the formula of the following compound:
Iron [II] oxide
Write the formula of the following compound:
Lead [II] chloride
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.
Ca2(PO4)3
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaClO
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.
