Advertisements
Advertisements
प्रश्न
What is the difference between solutions and colloids ?
Advertisements
उत्तर
| Characteristics | Solution | Colloid |
| Mixture type | Homogenous mixture | Heterogeneous mixture |
| Scattering of light | It does not scatter light. | It scatters the beam of light and the effect created is called Tyndall effect. |
| Separation | It cannot be separated by filtration or centrifugation process. | It can be separated by centrifugation process. |
APPEARS IN
संबंधित प्रश्न
Liquids have definite volume but do not have definite shape.
Fill in the blank :
The substances which can flow are called ________
What are molecules ?
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
The three important metalloids are.............................. and ..........................
What is the most common way of expressing the concentration of a solution ?
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
Which of the following will show Tyndall effect ? Why ?
- Salt solution
- Starch solution
- Milk
- Copper sulphate solution
Which of the following represents the solubility of sugar in water at 20°C ?
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 ?
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
The property which allows the metals to be hammered into their sheets is ______.
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
The phenomenon of Evaporation takes place at the ______ of a liquid.
Define the term matter.
Define the term matter.
Define the term matter.
