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प्रश्न
Write the formula of the following compound:
Aluminium oxide
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उत्तर
Aluminium oxide - Al2O3 - `"Al"^(3+)["O"]^(2-)`
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संबंधित प्रश्न
What is meant by the term chemical formula?
Fill the following blanks with suitable words :
In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ....................
What is the significance of the formula of a substance ?
Give the formula and valency of:
cupric ………………… .
Fill in the blank:
Formula of iron (ill) carbonate is _____ .
Correct the following statement:
A molecular formula represents an element.
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 |
What is a chemical formula? What is the significance of a formula?give an example to illustrate?
Write the formula of the following compound:
Potassium hydroxide
Write the formula of the following compound:
Magnesium chloride
Write the formula of the following compound:
Iron [II] chloride
Write the formula of the following compound:
Iron [II] oxide
Write the formula of the following compound:
Lead [II] sulphate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
BaCl2
Find the valency of the element which is underlined in the following formula.
- NaCl
- CO2
- Al (PO4)
- Ba (NO3)2
- CaCl2
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-`
Derive the chemical formula for calcium chloride.
