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प्रश्न
Write the formula of the following compound:
Iron [III] hydroxide
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उत्तर
Iron [III] hydroxide - Fe[OH]3 - `"Fe"^(3+)"OH"^(1-)`
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संबंधित प्रश्न
Write down the formulae of sodium oxide.
The radius of an oxygen atom is 0.073 nm. What does the symbol ‘nm’ represent ?
What is meant by the symbol of an element ? Explain with examples.
What do the following abbreviations stand for ?
- O
- 2O
- O2
- 3O2
Define ‘formula unit’ of an ionic compound. What is the formula unit of (i) sodium chloride, and
(ii) magnesium chloride ?
Correct the following statement:
A molecular formula represents an element.
Correct the following statement:
Formula of iron (lll) oxide is FeO.
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 |
The formula of the nitride of a metal X is XN, state the formula of :
- its sulphate
- its hydroxide.
Name the element in the compound and give the formula of the following compound:
Carbonic acid
Name the element in the compound and give the formula of the following compound:
Blue vitriol
Write the formula of the following compound:
Sodium nitrate
Write the formula of the following compound:
Sodium carbonate
Write the formula of the following compound:
Sodium permanganate
Write the formula of the following compound:
Sodium hydroxide
Write the formula of the following compound:
Zinc chloride
Write the formula of the following compound:
Zinc oxide
Write the formula of the following compound:
Copper [II] oxide
What do you understand by chemical formula of a compound? What is its significance?
Write the chemical formula for the following elements.
- Hydrogen
- Nitrogen
- Ozone
- Sulphur
