Advertisements
Advertisements
प्रश्न
State whether colloidal solutions are homogeneous or heterogeneous.
Advertisements
उत्तर
Colloids are heterogeneous mixtures. The size of the particles in the colloids is bigger than the size of particles in the true solutions.
APPEARS IN
संबंधित प्रश्न
Define matter.
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Name a metal which has no fixed shape.
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
State whether the following statement is true or false :
Bread is an example of solid foam.
State whether the following statement is true or false :
Sponge is an example of solid sol.
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
Milk of Magnesia is :
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
Name the process which can be used to recover salt from an aqueous salt solution.
One of the following does not undergo sublimation. This one is :
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
Define the term matter.
A standard sheet of paper is about ______ of atoms thick
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
Atoms or groups of atoms having a charge are called ______.
The physical state of water at 373 K is ______.
Define the term matter.
