log up log in
ncert help

NCERT Solutions, CBSE Sample paper, Latest Syllabus, NCERT Books, Last Year Question Papers and Many More ...

CBSE Video lectures for download

     

=In text questions page number 15

=In text questions page number 18

=In text questions page number 24

=In text questions page number 24

 

In text questions page number 18

In text questions page number 18

1. Differentiate between homogeneous and heterogeneous mixtures with examples.
Answer:
Homogeneous Mixtures Heterogeneous Mixtures
1. Homogeneous mixtures have uniform composition. 1. Heterogeneous mixtures have non uniform composition
2. It has no visible boundaries of separation between its constituents. 2. It has visible boundaries of separation between its constituents.
3. Some examples of homogeneous mixtures are: salt in water, sugar in water. 3. Some examples of heterogeneous mixtures are: water and sand, oil and water.

2. How are sol, solution and suspension different from each other?
Answer:

Sol(Colloidal solution) Solution Suspension
1.They are heterogeneous in nature 1.They are homogeneous in nature 1.They are heterogeneous in nature
2. They scatter a beam of light and hence show Tyndall effect. 2. They do not scatter a beam of light and hence do not show Tyndall effect. 2. They do not scatter a beam of light and hence do not show Tyndall effect.
3. They are quite stable 3. They are very stable 3. They are unstable
4. Examples of sol are: milk, blood smoke etc. 4. Examples of solution are: salt in water, sugar in water. 4. Examples of suspension are: sand in water, dusty air

3. To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.
Answer:
Mass of solute (sodium chloride) =36g
Mass of solvent (water) =100g
Mass of solution = Mass of Solute + Mass of solvent
                          = 36g +100g = 136g

 

 



Open your video in VLC player or add '.mp4' extension at end of the video



In text questions page number 18

Please Click on G-plus or Facebook
   



Please send your queries at contact ncerthelp@gmail.com

 

Every effort has been made to ensure accuracy of data on this web site. We are not responsible for any type of mistake in data.
All pdf files or link of pdf files are collected from various Resources Or sent by Students. If any pdf file have any copyright voilation please inform us we shell remove that file from our website.Thanks