Advertisements
Advertisements
प्रश्न
What do the symbols, H2, S and O4 mean in the formula H2SO4 ?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.
Give the empirical formula of Acitic Acid CH3COOH.
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:
Ethanol
Write the formula of the following compound:
Sodium nitrite
Write the formula of the following compound:
Zinc sulphate
Write the chemical formula for the following compounds
- Aluminium sulphate
- Silver nitrate
- Magnesium oxide
- Barium chloride
There are ______ hydrogen atoms in water molecule.
There is ______ oxygen atom is water molecule.
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
