Class 6 Science Chapter 9 NCERT Solutions Hinglish mein: Methods of Separation in Everyday Life

Curiosity ke Chapter 9, Methods of Separation in Everyday Life, ke end mein diye “Let us enhance our learning” ke saare 10 sawalon ke jawab, aur unke baad in-text activities aur games. Short notes: Chapter 9 notes.

Question 1

What purpose does handpicking serve in the process of separation? (i) Filtration (ii) Sorting (iii) Evaporation (iv) Decantation

Jawab: (ii) Sorting. Handpicking mixture se bekaar tukde, jaise kankad aur bhoosa, haath se chhaant ke alag karti hai, size, rang aur shape ke fark se.

Question 2

Which of the following substances are commonly separated using the churning method? (i) Oil from water (ii) Sand from water (iii) Cream from milk (iv) Oxygen from air

Jawab: (iii) Cream from milk. Malaidaar doodh ya dahi mathne se halka fat (malai ya makkhan) alag hoke upar jama hota hai. Tel aur paani decantation se, aur ret aur paani sedimentation, decantation ya filtration se alag hote hain.

Question 3

Which factor is usually essential for the filtration? (i) Apparatus size (ii) Presence of air (iii) Pore size (iv) Temperature of the mixture

Jawab: (iii) Pore size. Filter apne chhedon se bade kanon ko rok leta hai aur liquid ko nikalne deta hai. Isi liye chhalni chai ki patti rokti hai par keechad nahi, aur bahut baarik chhedon wala filter paper keechad bhi rok leta hai.

Question 4

State with reason(s) whether the following statements are True [T] or False [F]. Also, correct the False statement(s).

• (i) Salt can be separated from salt solution by keeping it under the Sun. True. Suraj ki garmi se paani evaporate hota hai aur namak bach jaata hai, jaise samudra ke paani ke uthle gaddhon mein.
• (ii) Handpicking should be used only when the quantity of one component is less. True. Handpicking tabhi suvidha ki hai jab hataane wale tukde kam hon aur aasaani se chune ja sakein. Zyada maatra ke liye, jaise daanon mein mila bhoosa, winnowing use hoti hai.
• (iii) A mixture of puffed rice and rice grains can be separated by threshing. False. Threshing daanon ko danthal se alag karti hai. Sahi: A mixture of puffed rice and rice grains can be separated by winnowing, kyunki murmure bahut halke hain aur ud jaate hain.
• (iv) A mixture of mustard oil and lemon water can be separated by decantation. True. Tel paani mein nahi milta aur upar alag parat banata hai, isliye use dhyaan se nikaala ja sakta hai.
• (v) Sieving is used to separate a mixture of rice flour and water. False. Sieving alag size ke solid kan alag karti hai. Sahi: A mixture of rice flour and water can be separated by sedimentation and decantation, followed by filtration, kyunki aata paani mein nahi ghulta.

Question 5

Match the mixtures in Column I with their method of separation in Column II.

Column I (mixture)	Column II (tareeka)
(i) Gram flour mixed with black gram	(d) Sieving
(ii) Chalk powder mixed with water	(e) Filtration
(iii) Corn mixed with potatoes	(a) Handpicking
(iv) Iron powder mixed with sawdust	(b) Magnetic separation
(v) Oil mixed with water	(c) Decantation

Question 6

In what situations would you use decantation instead of filtration to separate solids from liquids?

Jawab: Decantation behtar hai jab:

• solid bhaari ho aur jaldi baith jaaye, jaise paani mein ret ya mitti, ya dhote waqt chawal aur daal;
• liquid zyada maatra mein ho aur jaldi, mota-mota alag karna kaafi ho;
• liquid nikaal ke solid rakhna ho, jaise chawal dhote waqt;
• do liquids na milte hon, jaise tel aur paani, jinhe koi filter alag nahi kar sakta.

Filtration tab chahiye jab kan baarik hon aur tairte rahein, ya jab solid ka har kan hataana ho.

Question 7

Can you relate the presence of nasal hair to any separation process?

Jawab: Haan, filtration se. Naak ke baal filter ki tarah kaam karte hain: saans ke saath andar aane wali hawa ki dhool aur doosre kan rok lete hain aur hawa ko phephdon tak jaane dete hain.

Question 8

During the COVID-19 pandemic, all of us wore masks. Generally, what material are they made of? What is the role of these masks?

Jawab: Masks aksar kapde ki parton, jaise cotton, ya khaas fibre wale padarthon se bante hain. Ye filter ka kaam karte hain: unke reshon ke beech ki chhoti jagah hawa ko nikalne deti hai par zyadatar boondon, dhool aur germs ko rok leti hai, jisse pehenne wala aur aas-paas ke log dono surakshit rehte hain.

Question 9

A mixture containing potatoes, salt and sawdust has been given to you. Outline a stepwise procedure for separating each component from this mixture.

Jawab:

1. Aaloo handpick karo, kyunki wo bade aur aasaani se dikhte hain.
2. Namak aur buraade ko paani mein daal ke hilaao. Namak ghul jaata hai; buraada nahi.
3. Mixture ko filter karo (ya tairta buraada upar se nikaal lo). Buraada filter pe residue ban ke rukta hai; use sukha lo.
4. Filtrate (namak ka ghol) ko garam karke ya dhoop mein rakh ke evaporate karo. Namak bach jaayega.

Question 10

Read the story ‘Intelligent Leela’ and tick the most appropriate options. Provide a suitable title.

Jawab: Sahi vikalp hain: thirsty, water, unfit, filtered, muslin cloth, boiled, cooling, filtered, fit. Yaani kahani aise padhi jaayegi: papa ko thirsty lagne se pehle wo talab se water laane gayi; ganda paani peene ke liye unfit tha; usne use baithne diya aur phir muslin cloth se filtered kiya; dhake bartan mein lagbhag 10 minute boiled kiya; cooling ke baad phir se filtered kiya aur peene ke liye fit banaya.

Title ka sujhaav: Leela Makes Muddy Water Safe (ya Clean Water for Father).

In-text activities aur sawal

Moongfali ke chhilke aur murmure (pages 165–166)

• Activity 9.1: bhuni moongfali ragadne se chhilke utar jaate hain. Phoonk maarne pe halke chhilke ud jaate hain aur bhaari moongfali reh jaati hai. Phoonk ki hawa halke hisse ko bhaari se alag karti hai.
• Gehun ke daane aur bhoosa (Fig. 9.4): dono ek jagah nahi girte. Hawa bhoose ko uda le jaati hai aur daane kisan ke paas girte hain, isliye hawa unhe alag kar sakti hai.
• Chana dal mein mile murmure: dheere se phoonk maaro ya phatko; halke murmure bhaari dal se door ud jaate hain.
• Valli band kamre mein winnowing nahi kar paa rahi: pankha chalao ya soop pe phoonk maaro.

Chhalni (page 167)

Chhalni ke saare chhed aksar ek hi size ke hote hain. Agar chhed saare kanon se bade hon to sieving kaam nahi karegi, kyunki sab kuch gir jaayega. Jo kan nikalte hain wo chhedon se chhote hote hain, aur jo rukte hain wo bade.

Sabarmati Ashram kis liye mashhoor hai? Ye Namak Satyagraha, yaani Dandi March, se juda hai. Extra: Ahmedabad ka ye ashram kai saal Mahatma Gandhi ka ghar raha, aur 1930 mein wo yahin se Dandi March pe nikle the, samudra kinaare Dandi tak paidal chal ke samudra ke paani se namak banaane, angrezon ke namak kaanoon ke virodh mein.

Namak wale paani se namak (pages 168–169)

• Namak wale jal sroton: samudra, aur Rajasthan ki Sambhar jheel. Extra: Rajasthan ki Pachpadra aur Didwana bhi namak ki jheelein hain.
• Garmi mein gehre kapdon pe safed daag: paseene mein paani mein ghule namak hote hain; paseena udne pe namak safed daag ban ke reh jaate hain.
• Activity 9.2: kaale kaagaz pe bane daag namak hain. Paani hawa mein ud gaya.
• Activity 9.3: china dish mein namak ka ghol garam karne se paani ud jaata hai aur dish mein namak bachta hai.
• Namak aur paani dono wapas: vapour ko thanda karo taaki wo doosre bartan mein paani ban jaaye; ye process condensation hai.

Chai, tel-paani aur kapde ke filter (pages 170–172)

• Tel aur paani: chhodne pe do parat ban jaati hain, isliye tel decantation se alag ho sakta hai.
• Kapde ki kitni parat? 2, phir 4, phir 8 parat try karo. Zyada parat se chhed chhote aur paani saaf hota hai, par paani dheere nikalta hai. Tab tak kapda modo jab tak filtrate saaf na dikhe.
• Activity 9.5, paani ka filter model: plastic bottle ka tala kaat ke ulta karo. Gardan pe kapda ya cotton rakho, phir charcoal, baarik ret, moti ret aur chhote pathron ki parat. Upar se talab ka paani daalo aur neeche ikattha karo. Paani saaf dikhega, par peene se pehle ubaalna phir bhi zaroori hai.
• Khatta doodh: isse paneer banaaya ja sakta hai. Thos hissa malmal ke kapde se chhaan ke liquid (whey) se alag kiya jaata hai, jo filtration hai.

Churning aur magnet (pages 173–175)

• Chhaach banaane ka bijli wala kitchen appliance: mixer ya blender, jo dahi ko math deta hai.
• Carpenter ki keelein: magnet use hua, isliye tareeka magnetic separation hai.

Activity 9.6: do tokriyan

Tokri 1, bekaar hissa hataane ke liye: daal se kankad (1), pake daliya ya poha se hari mirch (3), tarbooz se beej (4).

Tokri 2, do kaam ke hisse alag karne ke liye: dahi se makkhan (2), building ke saamaan se buraada aur lohe ki keelein (5), baaki phoolon se genda (6), ret se kankad (7), chawal ke aate se nariyal ke tukde (8), paani se tel (9), namak ke ghol se namak (10).

Kuch cheezein dono tokriyon mein ja sakti hain agar tum wajah samjhao: jaise paani se tel Tokri 1 mein jaayega agar paani bekaar hai.

Game: Wise Fish

Tank 1 (tareeka)	Tank 2 (milti hui parchi)
Handpicking	larger particles are handpicked
Threshing	beating stalks to remove grains
Winnowing	lighter component is separated by blowing air
Sieving	difference in size of solid particles
Sedimentation	heavier particles settle down
Decantation	mixture of oil and water
Filtration	insoluble particles get filtered as residue
Evaporation	separate salt from seawater
Condensation	conversion of water vapour into its liquid state
Churning	extract butter from curd
Magnetic separation	difference in magnetic properties

Scientist ki tarah socho (page 181)

Lohe ki keelein, ret, kaali mirch, kankad, aam namak aur paani ke mixture ke liye:

1. Magnet se lohe ki keelein nikaalo.
2. Kankad aur kaali mirch handpick karo, jo bade aur aasaani se dikhte hain.
3. Ret ko baithne do aur namkeen paani decant karo, phir bachi ret hataane ke liye filter karo.
4. Namak paane ke liye filtrate ko evaporate karo. Paani bhi chahiye to vapour ko condense karo.