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प्रश्न
What is the effect of temperature on the solubility of solids in liquids ?
उत्तर
Solubility of solids in liquids generally increases on increasing the temperature and decreases on decreasing the temperature of the solvent.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Name the property which enables metals to be drawn into wires.
The three important metalloids are.............................. and ..........................
What is the other name for impure substances ? Give two examples of impure substances.
A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO4 to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.
Which of the following is not an emulsion ?
One of the following does not show Tyndall effect. This one is :
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
Describe a method to separate a mixture of camphor and sand.
How will you separate a mixture of common salt, sulphur powder and sand ?
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
The boiling point of liquid argon is :
Name one pair of liquids which can be separated by using a separating funnel.
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
Why wires cannot be drawn from materials such as stone or wood?
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
