Advertisements
Advertisements
प्रश्न
Write the formula of the following compound:
Aluminium hydroxide
उत्तर
Aluminium hydroxide - Al[OH]3 - `"Al"^(3+)["OH"]^(1-)`
APPEARS IN
संबंधित प्रश्न
Write down the formulae of magnesium hydroxide.
What is the significance of the formula of a substance ?
An element Z has a valency of 3. What is the formula of oxide of Z ?
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its iodide ?
Correct the following statement:
Molecular formula of water is H2O2
Give the empirical formula of Acetylene C2H2
Identify the following substance:
Gas C that is colourless and can be used as a bleaching agent.
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:
Nitric acid
Write the formula of the following compound:
Sodium nitrate
Write the formula of the following compound:
Sodium bicarbonate
Write the formula of the following compound:
Zinc chloride
Write the formula of the following compound:
Zinc sulphate
Write the formula of the following compound:
Aluminium chloride
Write the formula of the following compound:
Iron [III] sulphide
Write the formula of the following compound:
Silver [I] chloride
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KCr2O7
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 |
