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प्रश्न
What do the symbols, H2, S and O4 mean in the formula H2SO4 ?
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उत्तर
In H2SO4, H2 represents two atoms of hydrogen; S represents an atom of sulphur; O4 represents 4 atoms of oxygen where all these atoms are chemically bonded to each other to form a molecule of sulphuric acid i.e., H2SO4.
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संबंधित प्रश्न
What is meant by the symbol of an element ? Explain with examples.
If the valency of carbon is 4 and that of sulphur is 2, work out the formula of the compound formed by the combination of carbon with sulphur. What is the name of this compound ?
(a) Write the symbols/formulae of two simple ions and two compound ions (or polyatomic ions).
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 |
Write the formula of the following compound:
Potassium dichromate
Write the formula of the following compound:
Sodium bisulphite
Write the formula of the following compound:
Calcium carbonate
Write the formula of the following compound:
Zinc chloride
