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Answers
Answer:
ANS - 19
Explanation:
1 - Aqueous Solution - An aqueous solution is a solution in which the solvent is water. It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula. For example, a solution of table salt, or sodium chloride (NaCl), in water would be represented as Na+(aq) + Cl−(aq). The word aqueous (which comes from aqua) means pertaining to, related to, similar to, or dissolved in, water. As water is an excellent solvent and is also naturally abundant, it is a ubiquitous solvent in chemistry. Aqueous solution is water with a pH of 7.0 where the hydrogen ions (H+) and hydroxide ions (OH−) are in Arrhenius balance (10−7).
2 - Condensation - Condensation is the change of the physical state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers to the water cycle.[1] It can also be defined as the change in the state of water vapor to liquid water when in contact with a liquid or solid surface or cloud condensation nuclei within the atmosphere. When the transition happens from the gaseous phase into the solid phase directly, the change is called deposition.
3 - Saturated Solution - saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved. At 20°C, the maximum amount of NaCl that will dissolve in 100. g of water is 36.0 g. If any more NaCl is added past that point, it will not dissolve because the solution is saturated.
Answer:
18. compound • a compound contains two or more elements in a fixed ratio by weight
• a compound has a definite formula
• a compound is always homogeneous
mixture • the components of a mixture may be present in any ratio.
• a mixture does not have a definite formula
• a mixture may be homogeneous and heterogeneous
19.
aqueous solution
An aqueous solution is a solution in which the solvent is water. It is mostly shown in chemical equations by appending to the relevant chemical formula.
eg- a solution of table salt
condensation
water which collects as droplets on a cold surface when humid air is in contact with it
saturated solution
A saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved.