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Published on: 12/06/2021
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Questions + Answers key
Take MCQ Science Test1.
Classify the following substances into deliquescent, hygroscopic. Conc. Sulphuric acid, Copper sulphate pentahydrate, Silica gel, Calcium chloride, and Gypsum salt.
2.
A hot saturated solution of copper sulphate forms crystals as it cools. Why?
3.
The aquatic animals live more in cold region Why?
4.
What is aqueous and non-aqueous solution? Give an example.
5.
What is mean by binary solution?
1.
|
Deliquescent |
Hygroscopic |
|---|---|
| Copper sulphate pentahydrate, Calcium chloride, Gypsum Salt. | Conc. Sulphuric acid, Silica gel. |
2.
(i) The number of water molecule in blue vitriol is five.
(ii) The hot saturated solution of copper sulphate has no water molecule.
(iii) When cooled the hot saturated solutions gain five molecules of water and it will turn to crystal.
3.
(i) Aquatic animals live more in cold regions.
(ii) More amount of dissolved oxygen is present in the water of cold regions.
(iii) This shows that the solubility of oxygen in water is more at low pressure.
4.
(i) Aqueous solution:
a) The solution in which water acts as a solvent is called aqueous solution.
b) Example: common salt in water, Copper Sulphate in water.
(ii) Non - Aqueous solution:
a) The solution in which any liquid, other than water, acts as a solvent is called non-aqueous solution.
b) Example: Sulphur dissolved in carbon disulphide, Iodine dissolved in carbon tetrachloride
5.
(i) A solution must at least be consisting of two components ( a solute and a solvent ).
(ii) Such solution which are made of one solute and one solvent (two components) are called binary solution.
(iii) e.g: On addition copper sulphate crystals to water.
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
