Advertisements
Advertisements
प्रश्न
Define solubility of a substance. How does it vary with temperature ?
उत्तर
Solubility is a property of a solid, liquid, or gaseous chemical solute to dissolve in a solid, liquid, or gaseous solvent to form a homogeneous solution.
Solubility of a given solute in a given solvent depends on temperature. For many solids dissolved in liquid water, the solubility increases with temperature up to 100°C. In liquid water at high temperatures (e.g., that approaching the critical temperature), the solubility of ionic solutes tends to decrease due to change in the property and structure of liquid water. The lower dielectric constant results in a less polar solvent.
Gaseous solutes exhibit more complex behavior with temperature. As the temperature is raised, gases usually become less soluble in water (to minimum, which is below 120°C for most permanent gases), but they are more soluble in organic solvents.
APPEARS IN
संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
The best evidence for the existence and movement of particles in liquids was provided by :
Name two solid, two liquid and two gaseous elements at the room temperature.
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
Explain what happens when a beam of light is passed through a colloidal solution.
Name the different types of solutions. Give one example of each.
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
What is the effect of temperature on the solubility of solids in liquids ?
What type of magnet is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Name the process by which common salt is obtained from sea-water.
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
All the matter made of ______.
Give an example of a molecule.
Define the term matter.
