Advertisements
Advertisements
प्रश्न
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
Advertisements
उत्तर
Miscible liquids are separated by fractional distillation.
APPEARS IN
संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Fill in the blank
All matter is made up of tiny particles called ______
When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
Which one of the following is not a metalloid ?
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
State whether the following statement is true or false :
Bread is an example of solid foam.
100 mL of water at room temperature of 25°C is taken in a beaker and a little of solid S is dissolved in it by stirring to obtain a solution X. More and more of solid S is added to the solution with constant stirring, while keeping the temperature of solution constant at 30°C. After some time it is observed that no more solid dissolves in water and at the same time some solid is also left undissolved at the bottom of the beaker.
- The contents of beaker are filtered through a filter paper to obtain solution Y in the form of a filtrate.
- What name is given to solutions like X ?
- What name is given to solutions like Y ?
- What will you observe if the solution Y at 30°C is cooled down to 10°C by keeping the beaker in crushed ice ? Why ?
- What term is used to denote the amount of solid dissolved in 100 grams of water in a solution lie Y ?
Name the process by which common salt is obtained from sea-water.
Name the process which can be used to purify an impure sample of copper sulphate.
How will you separate a mixture containing sand and sugar ?
How would you separate iodine from a mixture of iodine and common salt ?
How will you separate a mixture of iron filings and powdered carbon ?
Which of the following mixture cannot be separated by using water as the solvent ?
Pure copper sulphate can be obtained from an impure sample by the process of :
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
All the matter made of ______.
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
Evaporation does form bubbles.
