Watch Video
NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure in Hindi PDF Download
NCERT Solutions for Class 9 Science Chapter 2 - In Hindi
ShareShareFAQs on NCERT Solutions for Class 9 Science Chapter 2 - In Hindi
1. What type of mixtures are separated by the technique of crystallisation according to Chapter 2 of Class 9 Science?
Crystallisation is a technique used to remove impurities from the solid particles. It helps in the separation of pure solid from any given mixture in the form of crystals. The process finds its use in the purification of salt from the sea water. It can also be used to separate the crystals of alum from the impure sample. For more such insight into the chapter, it is important that the student refer to the NCERT solutions. The various exercises will help the student attain a better understanding of the chapter.
2. What are the two types of mixtures according to Chapter 2 of Class 9 Science?
The two types of mixtures are as follows:
Homogeneous Mixtures - It is a mixture where all the components of the given mixture are uniformly mixed and there are no boundaries that can be used to separate them. The best example of this is the mixture of sugar in water.
Heterogeneous Mixture - A heterogeneous mixture is a mixture where all the components are not uniformly mixed and there are boundaries that can be used to separate them. The best example of this would be the mixture of water and sand.
3. What is suspension and what are its properties according to Chapter 2 of Class 9 Science?
Suspension refers to the heterogenous mixture where the solute particles remain suspended instead of dissolving. For instance, the smoke in the air.
The main properties of suspension include :
Suspension is the heterogenous mixture
The particles in the suspension can be seen with the naked eye
The solute and the solvent will get separated when passed through the filter paper.
It exhibits the Tyndall effect, that is, it scatters the light when it is passed through this mixture.
This mixture is an unstable mixture and the solute usually settles down at the bottom of the mixture after some time.
4. How to obtain coloured components from blue or black ink according to Chapter 2 of Class 9 Science?
To obtain coloured components from blue or black ink, the process of evaporation is used. This is a process that finds its use in the separation of substances that are dissolved in water. This is possible because the liquid vaporizes much faster than the solid. This helps in the separation of volatile substances from non-volatile substances.
To separate the ink, follow these steps :
Fill a beaker up to half with water.
Place a watch glass at the mouth of the beaker.
Drop a few ink drops on the watch glass.
Heat the beaker. It is to be kept in mind that the ink is not to be heated directly
The evaporation starts taking place from the watch glass.
Continue the heating process until you stop noticing any changes on the watch glass.
5. Are the NCERT solutions helpful for Chapter 2 of Class 9 Science?
Yes, the NCERT solutions are extremely helpful for the students of Chapter 2 of Class 9 Science. These solutions are devised by experts to meet the demands of the students. They prepare the student to answer any question asked in the examination. The various exercises give the students enough practice that helps make the concepts crystal clear to students. Apart from this, the language used is very easy to grasp which helps the student to remember and retain all the important topics. The students can easily download these solutions from the website of Vedantu.
