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प्रश्न
Write the formula of the following compound:
Lead [II] nitrate
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उत्तर
Lead [II] nitrate - Pb[NO3]2 - `"NO"_3^(1-)`
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संबंधित प्रश्न
Fill the following blanks with suitable words :
In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ....................
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 ?
Name the following compounds. Also write the symbols/formulae of the ions present in them :
- CuSO4
- (NH4)2SO4
- Na2O
- Na2CO3
- CaCl2
An element Y has a valency of 4. Write the formula for its :
- chloride
- oxide
- sulphate
- carbonate
- nitrate
Complete the following statement by selecting the correct option :
The correct formula of aluminium oxide is
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 aluminate
Write the formula of the following compound:
Potassium iodide
Write the formula of the following compound:
Sodium sulphite
Write the formula of the following compound:
Calcium hydroxide
Write the formula of the following compound:
Zinc oxide
Write the formula of the following compound:
Copper [I] oxide
Write the formula of the following compound:
Copper [II] sulphide
Write the formula of the following compound:
Tetra amine copper [II] sulphate
Write the formula of the following compound:
Lead [II] chloride
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
(NH4)3SO4
Which of the following represents a correct chemical formula? Name it.
Write the molecular formulae of all the compounds that can be formed by the combination of the following ions
Cu2+, Na+, Fe3+, C1– , `"SO"_4^-2`, `"PO"_4^3-`
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.
