Chapter 9: Rozmarra mein Alag Karne ke Tareeke
Chaawal se kankad chunna, aata chhaanna, chai chhaanna, samudra se namak banaana: hum roz mishran alag karte hain. Is chapter mein hum tareeke seekhenge, har ek kyun kaam karta hai, aur sahi kaise chunein.
Is chapter mein tum
- samjhaana ki mishran kyun alag karte hain
- handpicking, gahaai, osaai aur sieving use karna
- sedimentation, decantation, filtration aur vashpan use karna
- hisson ke gunon se tareeka chunna
Topics
- Haath se Chunna, Gahaai aur Osaai NCERT Ch 9
Handpicking kuch bade ya alag dikhne wale tukde hataata hai.
- Chhaanna (Sieving) NCERT Ch 9
Sieving chhalni se alag size ke kan alag karta hai.
- Avsaadan, Nithaarna aur Filtration NCERT Ch 9
Sedimentation: bhaari na ghulne wale kan baithte hain. Decantation: upar ka drav alag daalo.
- Vashpan aur Sanghanan NCERT Ch 9
Vashpan ghule thos (jaise namak) ko drav se alag karta hai.
- Mathna aur Magnet se Alag Karna NCERT Ch 9
Mathna dahi se makkhan alag karta hai; magnet mishran se loha alag karta hai.
Key words
- Mixture
- do ya zyada cheezein mili hui
- Threshing / winnowing
- daane dandon se alag / hawa se bhoosi alag
- Sieving
- chhalni se size ke hisaab se alag
- Sedimentation / decantation
- thos ko baithne dena / drav nithaarna
- Filtration
- filter se na ghulne wale kan alag
- Evaporation / condensation
- drav → bhaap / bhaap → drav
Summary
- Mishran bekaar hisse hataane ya kaam ke hisse paane ke liye alag karte hain.
- Handpicking, gahaai, osaai aur sieving thos ko thos se alag karte hain.
- Sedimentation, decantation aur filtration na ghule thos ko drav se; vashpan ghule thos ko alag karta hai.
- Mathna aur magnet bhi use hote hain; aksar kai tareeke milaaye jaate hain.