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प्रश्न
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KCr2O7
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उत्तर
KCr2O7
Correct formula – K2Cr2O7
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संबंधित प्रश्न
State the chemical symbols for the following elements :
Sodium, Potassium, Iron, Copper, Mercury, Silver.
Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.
Work out the formula for sulphur dioxide. (Valencies : S = 4 ; O = 2)
An element Y has a valency of 4. Write the formula for its :
- chloride
- oxide
- sulphate
- carbonate
- nitrate
An element A forms an oxide A2O5.
What will be the formula of chloride of A ?
Give the empirical formula of : Benzene C6H6
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:
Ethane
Write the formula of the following compound:
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Write the formula of the following compound:
Magnesium nitrate
Write the formula of the following compound:
Magnesium oxide
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KNO3
Write the molecular formulae for the following compounds
Aluminium (III) nitrate
Write the molecular formulae for the following compounds
Calcium (II) phosphate
Write the molecular formulae for the following compounds
Iron (III) sulphide
Write the molecular formulae for the following compounds
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