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प्रश्न
Write the formula of the following compound:
Zinc oxide
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उत्तर
Zinc oxide - ZnO - `"Zn"^(2+)["O"]^(2-)`
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संबंधित प्रश्न
The formula of a compound is X3Y. The valencies of elements X and Y will be respectively :
Give the empirical formula of Glucose C6H12O6 .
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:
Ethane
Write the formula of the following compound:
Potassium permanganate
Write the formula of the following compound:
Potassium hydroxide
Write the formula of the following compound:
Calcium sulphite
Write the formula of the following compound:
Magnesium hydroxide
Write the formula of the following compound:
Zinc sulphate
Write the formula of the following compound:
Aluminium hydroxide
Write the formula of the following compound:
Iron [II] chloride
Write the formula of the following compound:
Iron [II] oxide
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
Ca2(PO4)3
What do you understand by chemical formula of a compound? What is its significance?
Which of the following represents a correct chemical formula? Name it.
Write the molecular formulae for the following compounds
Calcium (II) phosphate
Write the molecular formulae of all the compounds that can be formed by the combination of the following ions
Cu2+, Na+, Fe3+, C1– , `"SO"_4^-2`, `"PO"_4^3-`
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).
- Ammonia
- Carbon monoxide
- (Hydrogen chloride
- Aluminium fluoride
- Magnesium sulphide
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.
