Download App

Is Matter Around Us Pure? — Science STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure?3 Marks
Question
In what respects does a true solution differ from a colloidal solution?
✓

Answer

A true solution does not scatter a beam of light passing through it but a colloidal solution scatters a beam of light passing through it and renders its path visible. A true solution is a homogeneous mixture of two or more substances whereas a colloidal solution is a kind of solution in which the size of solute particles is intermediate between those in true solutions and those in suspensions and is a heterogeneous mixture.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Question Answer (3 Marks)" from Is Matter Around Us Pure?→Is Matter Around Us Pure? — all question types→Science STD 9 question papers→Maharashtra Board STD 9 question papers→Maharashtra Board question paper generator→

Similar questions

Show by means of calculations that $5$ moles of $CO_2​​​​​​​$​​​​​​​ and 5 moles of $H_2O$ do not have the same mass. How much is the difference in their masses?
→
Explain why, we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert.
→
When a cricket ball is thrown vertically upwards, it reaches a maximum height of $5$ meters.
  1. What was the initial speed of the ball?
  2. How much time is taken by the ball to reach the highest point? (g = $10ms^{-2}$^)
→
A body vibrating with a time-period of $\frac{1}{256}\text{s}$ produces a sound wave which travels in air with a velocity of 350m/s. Calculate the wavelength.
→
Three different atoms of oxygen are represented as:$^{16}_{\ 8}\text{O},\ ^{17}_{\ 8}\text{O}\text{ and }^{18}_{\ 8}\text{O}$
  1. What do the subscripts (lower figures) and superscripts (upper figures) represent?
  2. What factor is responsible for the change in the superscripts $16, 17$ and $18$, though the element is the same?
  3. What is the usual name for such atoms of an element?
  4. Give the nuclear composition of $​​^{18}_{\ 8}\text{O}$
→
What is the significance of the symbol of an element? Explain with the help of an example.
→
The mass of sun is $2 \times 10^{30}\  kg$ and the mass of earth is $6 \times 10^{24}\ kg$. If the average distance between the sun and the earth be $1.5 \times 10^8\  km$, calculate the force of gravitation between them.
→
If the aluminium salt of an anion $X$ is $Al_2X_3$, what is the valency of $X$? What will be the formula of the magnesium salt of $X$?
→
A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, what is the ratio of their kinetic energies?
→
A train travelling at $20\ ms^{-1}$ accelerates at $0.5\ ms^{-2}$​​​​​​​ for $30s$. How far will it travel in this time?
→