Chapter 2 | Is Matter Around Us Pure ? | Support Material | Assignment Questions | Class 9th Science

Chapter 2  | Is Matter Around Us Pure ? | Support Material | Assignment Questions | Class 9th Science 

VERY SHORT ANSWER TYPE QUESTIONS (1 Mark)

1. Suggest methods used for separation ?

(a) Husk from wheat

(b) Sand from water

(c) Stones from daal

(d) Camphor powder and common salt powder

(e) Butter from milk

(f) Pure potash alum from impure potash alum (phitkari)

SHORT ANSWER TYPE QUESTIONS (2 Marks)

1. Write basic principles behind :

(a) Chromatography

(b) Crystallisation

(c) Distillation

(d) Centrifugation

2. Work out a process for separating a mixture of sand, NH4Cl and common salt?

3. How can we separate alcohol from water? Explain the whole process

with diagram?

4. The municipality water that we get at our homes may still have germs in it. What can we do for it?

5. A student was having a beaker full of muddy water. He put a whitish

stone like substance in it and suddenly the mud settled down. What is this white substance and what do we call this process?

 

SHORT ANSWER TYPE QUESTIONS (3 Marks

     1.  Explain the techniques used in following diagrams :

     2.    An athlete underwent a dope test and was found positive for drugs. What could be the process used to identify that his blood contained those drugs? Explain the principle and process.