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प्रश्न
Write the formula of the following compound:
Magnesium chloride
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उत्तर
Magnesium chloride - MgCl2 - `"Mg"^(2+)["Cl"]^(1-)`
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संबंधित प्रश्न
What is meant by the symbol of an element ? Explain with examples.
Name the following compounds. Also write the symbols/formulae of the ions present in them :
- CuSO4
- (NH4)2SO4
- Na2O
- Na2CO3
- CaCl2
The formula of a compound is X3Y. The valencies of elements X and Y will be respectively :
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 |
Write the formula of the following compound:
Potassium bicarbonate
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:
Magnesium bicarbonate
Write the formula of the following compound:
Aluminium carbonate
Write the formula of the following compound:
Aluminium sulphate
Write the formula of the following compound:
Copper [II] sulphate
Write the formula of the following compound:
Lead [II] nitrate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KCr2O7
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
Ca2(PO4)3
Write the molecular formulae for the following compounds
Copper (II) bromide
Write the molecular formulae for the following compounds
Mercury (II) chloride
There is ______ oxygen atom is water molecule.
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
