Advertisements
Advertisements
प्रश्न
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Advertisements
उत्तर
Both the given solutions will be kept stationary in different beakers for some time. The beaker in which the dissolved particles settle down after some time is a suspension and another one is a solution.
APPEARS IN
संबंधित प्रश्न
What are molecules ?
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound ?
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
What are the three general classes of matter ? Give one example of each type.
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
What is the difference between solutions and colloids ?
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.
Name the process which is used in milk dairies to separate cream from milk.
Name the process by which all the dye can be recovered from black ink.
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
The material which is added to water during purification process at the water works so as to disinfect it is :
The best way to recover sugar from an aqueous sugar solution is :
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
______ is used for industrial refrigeration and transporting frozen food.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
Define the term matter.
