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प्रश्न
Write the formula of the following compound:
Sodium bisulphite
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उत्तर
Sodium bisulphite - NaHSO3 - `["HSO"_3]^(1-)`
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संबंधित प्रश्न
Write the chemical formula of the Magnesium chloride.
Write the chemical formula of the Calcium carbonate.
What is the difference between 2H and H2 ?
Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.
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 ?
Correct the following statement:
Molecular formula of water is H2O2
Give the empirical formula of : Benzene C6H6
XCl2 is the chloride of a metal X. State the formula of the sulphate and the hydroxide of the metal X.
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:
Phosphoric acid
Write the formula of the following compound:
Sodium dichromate
Write the formula of the following compound:
Calcium nitrate
Write the formula of the following compound:
Calcium bisulphite
Write the formula of the following compound:
Copper [II] chloride
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaCO3
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 for the following compounds
Iron (III) sulphide
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 |
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
