Advertisements
Advertisements
Question
What do the symbols, H2, S and O4 mean in the formula H2SO4 ?
Advertisements
Solution
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
RELATED QUESTIONS
What is meant by the symbol of an element ? Explain with examples.
What is the difference between 2H and H2 ?
Give the formula and valency of:
| Aluminate | ______ | ______ |
Write the formula of the following compound:
Sodium carbonate
Write the formula of the following compound:
Sodium bicarbonate
Write the formula of the following compound:
Magnesium hydroxide
Write the formula of the following compound:
Zinc oxide
Write the formula of the following compound:
Aluminium oxide
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
BaCl2
Complete the following crossword puzzle (Fig. 3.1) by using the name of the chemical elements. Use the data given in Table.
| Across | Down | ||
| 2 | The element used by Rutherford during his α–scattering experiment | 1 | A white lustrous metal used for making ornaments and which tends to get tarnished black in the presence of moist air |
| 3 | An element which forms rust on exposure to moist air | 4 | Both brass and bronze are alloys of the element |
| 5 | A very reactive non–metal stored under water | 6 | The metal which exists in the liquid state at room temperature |
| 6 | Zinc metal when treated with dilute hydrochloric acid produces a gas of this element which when tested with burning splinter produces a pop sound. | 8 | An element with symbol Pb |

