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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
Write the chemical formula of the Calcium carbonate.
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A molecular formula represents an element.
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Gas C that is colourless and can be used as a bleaching agent.
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:
Nitric acid
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Calcium sulphite
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Calcium bicarbonate
Write the formula of the following compound:
Copper [I] chloride
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Copper [I] oxide
Write the formula of the following compound:
Iron [II] sulphate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KNO3
Find the valency of the element which is underlined in the following formula.
- NaCl
- CO2
- Al (PO4)
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Write the molecular formulae for the following compounds
Calcium (II) phosphate
Derive the chemical formula for calcium chloride.
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.
