14. Name the solute and solvent in aerated drinks.
15. What happens when saturated solution is allowed to cool?
16. Name the process used to obtain pure sugar from sugar solution.
17. A mixture of alcohol and water is a homogeneous while that of oil and water
is heterogeneous. Justify the statement.
18. What will you observe when dilute hydrochloric acid is added to a mixture of
Iron filings and sulphur powder?
19. When a beam of light was passed through a solution of substance A dissolved
in water, the path of light could be seen. What is this phenomenon called?
What is the nature of the solution?
20. Name the process you would use to separate a mixture of naphthalene and
common salt.
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Answers
Answer:
Here comes the list :)
Explanation:
14) solute is a gas particularly carbon dioxide.
solvent is water.
15) If a saturated solution is cooled below a temperature at which the solution is prepared, then it will lead to a decrease in solubility of the solute. ... Again, if this solution is heated, the crystals would dissolve in the solution and no longer be visible
16) Sugar can be separated from its solution by using both evaporation and crystallization. But crystallization method is preferred over evaporation because in crystallization we get pure crystals of sugar whereas in evaporation charring of sugar can takes place
17) a mixture of alcohol and water is homogeneous and while that of oil and water is heterogeneous as they don't mix instead they form layers which are quite visible.
18) Fe(s)+S(s)→ Mixture of iron filings and sulphur
When dilute HCl is added to it.
Fe(s)+S(s)+2HCl(aq)→FeCl2+H2 + S
Sulphur remains unreacted. H2S gas formed has a foul smell and on passing through lead acetate solution, it turns the solution black. Hydrogen gas burns with a pop sound.
19) When a beam of light was passed through a solution of substance A dissolved in water, the path of light could be seen. This is due to the phenomenon know as TYNDALL EFFECT.
The nature of solution is Colloidal.
20) The process used to separate naphthalene from common salt is know as sublimation. As naphthalene is a sublime substance while common salt is not so it easily gets separated by this this method.
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