Mixture Kya Hai? (Aur Hawa bhi ek Mixture hai!)
Bhel puri se lekar saans tak: mixtures har jagah hain 🔬
🧭 Is Post Mein
📖 Kahani: Golu ki Bhel aur Priya ka Nimbu Pani
Shaam ko Golu ne bhel banayi: murmure, pyaaz, tamatar, sev, moongphali aur chutney, sab ek katori mein. Uski behen Priya ne nimbu pani banaya: paani, nimbu ka ras, cheeni aur thoda namak.
Golu bola: “Meri bhel mein sab alag-alag dikh raha hai. Tere nimbu pani mein toh cheeni gayab ho gayi!”
Priya muskurayi: “Gayab nahi hui, chakh ke dekh. Meetha hai na? Matlab cheeni andar hi hai.”
Dono ek hi sawaal pe aa gaye: jab hum cheezein milate hain, toh asal mein hota kya hai? Kya woh badal jaati hain, ya wahi rehti hain? Aaj isi ka jawab dhoondhenge. 🔍
🎯 Is Post Mein Kya Seekhenge
- Mixture kise kehte hain, aur uski 3 pehchaan
- Mixture mein cheezein apne gun (properties) kyun nahi chhodti
- Hawa ek mixture hai: isme kya-kya hai aur hum kaise saabit karein
- Ghar pe ek mixture ko alag karke dekhna
🧱 Basics: Pehle Yeh Aana Chahiye
1. Matter (padarth): jiska vajan ho aur jo jagah ghere. Paani, hawa, pathar, cheeni, sab matter hain.
2. Matter chhote-chhote kanon (particles) se bana hai. Yeh kan itne chhote hain ki aankh se nahi dikhte. (Yeh aapne Chapter 7 “Particulate Nature of Matter” mein padha hai.)
3. Property (gun): kisi cheez ki pehchaan, jaise rang, swaad, gandh, ghulna ya na ghulna, chumbak se chipakna ya nahi.
💡 Concept: Mixture Kya Hai?
Mixture = jab do ya do se zyada cheezein (substances) bas mil jaati hain, lekin koi nayi cheez nahi banti, aur har cheez apni pehchaan bachaye rakhti hai.
Ise teen pehchaan se pakdo:
Bhel mein moongphali ab bhi moongphali jaisi kurkuri hai, pyaaz ab bhi teekha. Nimbu pani mein cheeni ab bhi meethi hai.
Kyun? Kyunki cheezon ke kan bas paas-paas aa gaye hain, aapas mein jud kar kuch naya nahi banaya.
Nimbu pani mein 1 chammach cheeni dalo ya 3, dono nimbu pani hi kehlayenge. Bhel mein sev zyada ho ya kam, bhel hi rahegi.
Kyun? Kyunki mixture banne ke liye koi pakka hisaab (fixed ratio) zaroori nahi.
Bhel se moongphali haath se chun sakte ho. Namak wale paani ko garam karke paani udao, namak bach jayega.
Kyun? Kyunki koi nayi cheez bani hi nahi thi. Cheezein bas saath thi, toh unhe wapas alag kiya ja sakta hai.
Ek line mein: Mixture = milna, badalna nahi.
🌬️ Kya hawa bhi mixture hai?
Haan! Hawa dikhti nahi, lekin yeh kai gases ka mixture hai. Har gas apna kaam karti rehti hai, yani apne gun nahi chhodti:
- Nitrogen: lagbhag 78%, sabse zyada
- Oxygen: lagbhag 21%, jo hum saans mein lete hain
- Argon: lagbhag 0.9%
- Carbon dioxide: lagbhag 0.04%, bahut kam, lekin paudhon ke liye zaroori
- Jal-vashp (water vapour) aur dhool ke kan: inki matra jagah aur mausam ke saath badalti hai
Hawa mixture kyun hai? (1) Oxygen saans mein kaam aati hai aur carbon dioxide paudhon ke kaam aati hai, yani har gas apna gun rakhti hai. (2) Inki matra badal sakti hai: bheed wale kamre mein CO₂ zyada, baarish ke mausam mein nami zyada. (3) Inhe alag kiya ja sakta hai, jaise factory mein hawa ko thanda karke oxygen alag karte hain.
Hawa mein saari gases har jagah ek jaisi mili hoti hain. Aise mixture ko uniform (ek-saman) mixture kehte hain. Mixtures ke prakar hum agle post mein detail mein padhenge.
🖼️ Diagrams: Picture se Samjho
🔐 Deep Concept: “Gayab” hona aur “badal jaana” alag cheezein hain
Priya ki cheeni paani mein ghul kar dikhni band ho gayi. Lekin na dikhna ka matlab na hona nahi hai. Cheeni ke kan itne chhote tukdon mein bant gaye ki paani ke kanon ke beech fail gaye. Swaad abhi bhi meetha hai, yani cheeni ka gun bacha hai.
Ab socho, roti tawe pe jal kar kaali ho gayi. Woh kaala hissa ab roti nahi, koyla jaisa kuch naya hai. Use wapas aata nahi bana sakte. Yahan nayi cheez ban gayi.
Science ka sawaal hamesha yeh hai: kya cheezein sirf saath hain (mixture), ya jud kar kuch naya bana (yeh hum Post 5 “Compounds” mein padhenge)?
✏️ Examples: Mixture hai ya nahi?
Daal daal hai, chawal chawal. Dono ko chamach se alag kar sakte ho, aur koi nayi cheez nahi bani.
Paani + namak + doosre ghule padarth. Dhoop mein paani udne pe namak bach jaata hai. Isi tarah namak banaya jaata hai!
Chumbak ghumao, loha chipak jaayega aur reth wahin rahegi. Loha apna “chumbak se chipakne” wala gun nahi bhoola.
Garmi se nayi cheez ban gayi, jo wapas aata nahi ban sakti. Yeh “milna” nahi, “badalna” hai.
⚖️ Difference Table: Sirf Milna vs Nayi Cheez Banna
| Baat | Mixture (sirf milna) | Nayi cheez banna |
|---|---|---|
| Gun (properties) | Har cheez apne gun rakhti hai | Naye gun aa jaate hain |
| Matra | Kitni bhi ho sakti hai | Pakki (fixed) hoti hai |
| Alag karna | Saadhe tareekon se: chhanna, chumbak, garam karke udana | Saadhe tareekon se nahi hota |
| Example | Bhel, namak-paani, hawa | Jali roti, lohe pe jang |
🚫 Misconceptions: Log aisa sochte hain… lekin
❌ “Mixture mein cheezein hamesha alag-alag dikhti hain.”
✅ Sach: nimbu pani aur hawa bhi mixtures hain, par unke hisse alag nahi dikhte.
❌ “Hawa mein sabse zyada oxygen hai.”
✅ Sach: sabse zyada nitrogen hai (lagbhag 78%). Oxygen lagbhag 21% hai.
❌ “Ghulne ke baad namak khatam ho gaya.”
✅ Sach: paani chakho, khaara lagega. Paani udao, namak wapas mil jaayega.
❌ “Mixture mein cheezein barabar matra mein honi chahiye.”
✅ Sach: matra kuch bhi ho sakti hai. Yahi mixture ki pehchaan hai.
🔤 Key Terms (Exam mein English shabd hi likhna)
❓ FAQs
1. Agar cheeni dikhti nahi, toh pakka kaise pata ki woh paani mein hai?
Teen tareeke: (1) chakho, meetha lagega. (2) Paani ko dheere-dheere uda do, neeche cheeni ki parat bachegi. (3) Ghol ka vajan karo, sirf paani se zyada niklega. Na dikhna “na hona” nahi hai.
2. Hawa toh ek hi cheez lagti hai, phir mixture kyun?
Kyunki hawa ke andar alag-alag gases hain jo apne-apne gun rakhti hain: oxygen jalne mein madad karti hai, CO₂ lime water ko doodhiya karti hai. Inki matra bhi badalti hai, jaise kamre mein bheed ho toh CO₂ badh jaati hai. Ek hi cheez hoti toh aisa nahi hota.
3. Kya mixture ki matra sach mein kuch bhi ho sakti hai?
Haan. Chai mein cheeni kam ya zyada, chai hi rahegi. Isiliye mixture ka koi “formula” nahi hota. Jab cheezein jud kar nayi cheez banati hain, tab matra pakki hoti hai. Yeh hum aage Compounds mein padhenge.
4. Dhool ke kan hawa ka hissa kaise hue?
Dhool hawa mein tair rahi hoti hai aur hawa ke saath ghoomti hai, isliye hawa ke mixture mein gini jaati hai. Par iski matra har jagah alag hai: sadak ke paas zyada, jungle mein kam.
5. Kya har cheez jo mili hui hai, mixture hai?
Nahi. Agar milne ke baad nayi cheez ban gayi, naye gun aa gaye aur saadhe tareekon se alag na ho sake (jaise jali roti), toh woh mixture nahi. Mixture ki teeno pehchaan check karo.
🧪 Activity (NCERT): Hawa mein CO₂ aur dhool hai, saabit karo
Part A: CO₂ ki pehchaan
Kyun? Lime water carbon dioxide ke saath milkar ek safed cheez banata hai jo paani mein nahi ghulti, isliye doodhiya dikhta hai. Matlab hawa mein CO₂ hai, aur woh apna gun dikha rahi hai.
Part B: Dhool ki pehchaan
Kaala kagaz hi kyun? Kyunki kaale rang pe halki dhool saaf chamakti hai, safed kagaz pe chhup jaati.
Yeh activity NCERT ki Class 8 Science book Curiosity (Chapter 8) par aadharit hai, aur yahan apne shabdon mein samjhayi gayi hai.
🏠 Mini Experiments (Ghar pe)
Isse kya saabit hua? Mixture ke hisse saadhe tareekon se alag ho gaye, aur namak wapas namak hi mila. Teeno pehchaan sahi!
Kamre ke parde band karo aur sirf ek patli dhoop ki kiran aane do. Kiran mein chamakte kan dikhenge, yeh hawa mein tairti dhool hai. Hawa ka “chhupa” hissa dikh gaya!
🧠 Think Like a Scientist
Sawaal: Golu kehta hai, “Bhel mixture hai, par nimbu pani mixture nahi, kyunki usme kuch alag nahi dikhta.” Ek scientist ki tarah ise kaise check karoge?
Scientist ka tareeka dekho
1. Observe (dekho): nimbu pani mein kuch alag nahi dikhta.
2. Guess (anumaan): shayad cheeni aur namak andar chhupe hain.
3. Test (jaanch): chakh ke dekho (meetha-namkeen), ya thoda nimbu pani plate mein sukha do.
4. Result: plate pe safed parat bachti hai, yani cheeni aur namak andar the.
5. Conclusion: nimbu pani bhi mixture hai. Golu ka anumaan galat nikla, aur science mein yeh bilkul theek hai. Galat anumaan ko test karke sudharna hi science hai! 🔬
🌍 Real Life Mein Mixtures
- 🍵 Chai: paani, doodh, patti ka ras, cheeni. Har ghar mein roz banta mixture.
- 🏗️ Cement ka masala: cement, reth, gitti aur paani. Mistri matra badal kar mazboot ya halka masala banate hain.
- 🌊 Namak banana: samudra ka paani dhoop mein sukha kar namak alag karte hain.
- 🏥 Hospital ki oxygen: hawa ke mixture se oxygen alag karke cylinder mein bhari jaati hai.
- 😷 Mask: hawa ke mixture se dhool ke kan rok leta hai.
🔁 Recap: Poora Post Ek Nazar Mein
- Mixture = do ya zyada cheezon ka mel, jisme koi nayi cheez nahi banti.
- 3 pehchaan: (1) har hissa apne gun rakhta hai, (2) matra kuch bhi ho sakti hai, (3) saadhe tareekon se alag ho sakta hai.
- Ghulne se cheez gayab nahi hoti. Na dikhna “na hona” nahi hai.
- Hawa ek uniform mixture hai: nitrogen ≈ 78%, oxygen ≈ 21%, argon ≈ 0.9%, CO₂ ≈ 0.04%, saath mein jal-vashp aur dhool.
- Lime water ka doodhiya hona hawa mein CO₂ dikhata hai. Kaala kagaz hawa ki dhool dikhata hai.
- Jali roti jaisi cheezon mein nayi cheez banti hai, isliye woh mixture nahi.
✍️ Fill in the Blanks
- Do ya zyada cheezon ka mel jisme nayi cheez nahi banti, ______ kehlata hai.
- Hawa mein sabse zyada matra ______ gas ki hai.
- CO₂ milne pe lime water ______ ho jaata hai.
- Hawa mein oxygen lagbhag ______% hai.
- Mixture ke hisse ______ tareekon se alag kiye ja sakte hain.
- Jis mixture mein hisse har jagah ek jaise mile hon, use ______ mixture kehte hain.
Answers
1) mixture · 2) nitrogen · 3) doodhiya (milky) · 4) 21 · 5) saadhe (physical) · 6) uniform
✅ True / False
- Mixture mein cheezein apne gun kho deti hain.
- Hawa ek mixture hai.
- Mixture mein hisson ki matra hamesha barabar hoti hai.
- Paani mein ghuli cheeni ko paani uda kar wapas paa sakte hain.
- Hawa mein carbon dioxide ki matra oxygen se zyada hai.
- Jali hui roti ek mixture hai.
Answers (kyun ke saath)
1) False: har hissa apne gun rakhta hai.
2) True: kai gases, jal-vashp aur dhool ka mel hai.
3) False: matra kuch bhi ho sakti hai.
4) True: paani udta hai, cheeni bachti hai.
5) False: CO₂ lagbhag 0.04% hai, oxygen lagbhag 21%.
6) False: garmi se nayi cheez ban gayi.
🔘 MCQs
Q1. Inme se mixture kaun sa hai? (a) Shuddh paani (b) Hawa (c) Cheeni ka ek daana (d) Sona ka sikka
✅ (b) Hawa: kai gases ka mel hai.
(a) shuddh paani ek hi tarah ke kanon se bana hai.
(c) cheeni ka daana ek hi padarth hai.
(d) shuddh sona ek hi padarth hai.
Q2. Hawa mein sabse zyada kaunsi gas hai? (a) Oxygen (b) Carbon dioxide (c) Nitrogen (d) Argon
✅ (c) Nitrogen: lagbhag 78%.
(a) oxygen lagbhag 21% hai, doosre number pe.
(b) CO₂ lagbhag 0.04%, bahut kam.
(d) argon lagbhag 0.9%.
Q3. Lime water ka doodhiya hona kis gas ko dikhata hai? (a) Oxygen (b) Nitrogen (c) Carbon dioxide (d) Jal-vashp
✅ (c) Carbon dioxide: lime water CO₂ ke saath safed na-ghulne wali cheez banata hai.
(a), (b), (d) se lime water doodhiya nahi hota.
Q4. Mixture ki pehchaan kaun si NAHI hai? (a) Hisse apne gun rakhte hain (b) Matra pakki hoti hai (c) Saadhe tareekon se alag ho sakta hai (d) Koi nayi cheez nahi banti
✅ (b) yeh galat hai: mixture mein matra kuch bhi ho sakti hai.
(a), (c), (d) teeno mixture ki sahi pehchaan hain.
Q5. Namak wale paani se namak wapas kaise milega? (a) Chumbak se (b) Kapde se chhaan kar (c) Paani uda kar (d) Haath se chun kar
✅ (c): paani udta hai, namak bachta hai.
(a) namak chumbak se nahi chipakta.
(b) ghula hua namak kapde se nikal jaata hai.
(d) ghule namak ke kan dikhte hi nahi.
Q6. Reth aur lohe ke choore ko sabse aasaani se kaise alag karoge? (a) Chumbak (b) Paani uda kar (c) Garam karke (d) Hila kar
✅ (a) Chumbak: loha chipak jaata hai, reth nahi.
(b) yahan koi ghol nahi hai.
(c) garam karne se dono alag nahi honge.
(d) hilane se aur mil jayenge.
Q7. Hawa ko uniform mixture kyun kehte hain? (a) Kyunki dikhti nahi (b) Kyunki usme sirf ek gas hai (c) Kyunki uski gases har jagah ek jaisi mili hoti hain (d) Kyunki woh thandi hai
✅ (c): uniform = har jagah ek jaisa mel.
(a) na dikhna uniform hone ka kaaran nahi.
(b) hawa mein kai gases hain.
(d) taapmaan ka isse lena-dena nahi.
Q8. Dhool dekhne ke liye kaala kagaz kyun lete hain? (a) Kaala kagaz dhool kheenchta hai (b) Kaale rang pe halke kan saaf dikhte hain (c) Kaala kagaz sasta hai (d) Safed kagaz pe dhool nahi girti
✅ (b): contrast se kan dikhte hain.
(a) kaala rang dhool nahi kheenchta.
(c) sasta hona science ka kaaran nahi.
(d) dhool dono pe girti hai, bas safed pe dikhti nahi.
🔗 Assertion–Reason
Options: (a) A aur R dono sahi, aur R, A ko samjhata hai · (b) A aur R dono sahi, par R, A ko nahi samjhata · (c) A sahi, R galat · (d) A galat, R sahi
1. A: Nimbu pani ek mixture hai. R: Nimbu pani mein cheeni apna meetha gun rakhti hai.
✅ (a): hisse apne gun rakhte hain, yahi mixture ki pehchaan hai, isliye R, A ko samjhata hai.
2. A: Hawa mein oxygen sabse zyada hai. R: Hum saans mein oxygen lete hain.
✅ (d): A galat hai (sabse zyada nitrogen hai). R sahi hai.
3. A: Hawa ek mixture hai. R: Hawa mein alag-alag jagah dhool aur nami ki matra alag hoti hai.
✅ (a): matra badalna mixture ki pehchaan hai, isliye R, A ko samjhata hai.
📝 Very Short Answer (1 mark)
1. Mixture ki paribhasha likho.
Do ya do se zyada padarthon ka aisa mel jisme koi nayi cheez nahi banti aur har padarth apne gun rakhta hai.
2. Hawa ki do mukhya gases ke naam likho.
Nitrogen (lagbhag 78%) aur oxygen (lagbhag 21%).
3. Kaunsa test hawa mein CO₂ dikhata hai?
Lime water test: CO₂ milne pe lime water doodhiya ho jaata hai.
4. Ghar ke kisi ek mixture ka naam likho.
Chai, bhel, nimbu pani, namak-paani (koi bhi ek).
5. Uniform mixture ka ek example do.
Hawa (ya cheeni ka ghol).
📝 Short Answer (2–3 marks)
1. Mixture ki teen pehchaan example ke saath likho.
(1) Hisse apne gun rakhte hain: nimbu pani mein cheeni meethi rehti hai.
(2) Matra kuch bhi ho sakti hai: chai mein cheeni kam ya zyada.
(3) Saadhe tareekon se alag: namak-paani se paani uda kar namak paana.
2. Hawa ko mixture kyun maana jaata hai? Do kaaran do.
(1) Hawa ki gases apne gun rakhti hain: oxygen saans mein kaam aati hai, CO₂ lime water ko doodhiya karti hai. (2) Inki matra badalti hai, jaise nami aur dhool jagah-jagah alag hoti hai.
3. Ghul jaane ke baad cheeni “gayab” kyun lagti hai? Kya woh sach mein gayab hai?
Cheeni ke kan bahut chhote tukdon mein paani ke kanon ke beech fail jaate hain, isliye dikhte nahi. Par cheeni gayab nahi hui: paani meetha hai, aur paani udane pe cheeni wapas mil jaati hai.
4. Kaale kagaz wali activity kya dikhati hai aur kaise?
Yeh dikhati hai ki hawa mein dhool ke kan hain. Khule mein rakhe kaale kagaz pe kuch ghante baad chhote safed-bhoore kan dikhte hain, kyunki kaale rang pe halke kan saaf chamakte hain.
📝 Long Answer (5 marks)
1. “Hawa ek mixture hai” — is kathan ko hawa ke hisson, unki matra aur do activities ki madad se samjhao.
Hawa ke hisse: nitrogen ≈ 78%, oxygen ≈ 21%, argon ≈ 0.9%, carbon dioxide ≈ 0.04%, saath mein jal-vashp aur dhool (inki matra badalti rehti hai).
Mixture kyun: (1) har gas apne gun rakhti hai, (2) matra badal sakti hai, (3) inhe alag kiya ja sakta hai (factory mein oxygen alag karna).
Activity 1 (CO₂): lime water mein hawa guzaarne pe woh doodhiya hota hai, yani hawa mein CO₂ hai.
Activity 2 (dhool): khule mein rakhe kaale kagaz pe dhool ke kan dikhte hain.
Nishkarsh: hawa kai cheezon ka mel hai jisme koi nayi cheez nahi bani, isliye hawa ek (uniform) mixture hai.
2. Namak aur reth ke mixture ko alag karne ka tareeka step-by-step likho. Har step kyun kiya, yeh bhi batao.
(1) Paani dalo aur hilao: namak ghul jaata hai, reth nahi. Isse dono ka fark saamne aata hai.
(2) Kapde ya filter paper se chhaano: reth ruk jaati hai kyunki uske kan bade aur na-ghule hain, namak wala paani nikal jaata hai.
(3) Chhane paani ko garam karo ya dhoop mein rakho: paani ud jaata hai, namak bach jaata hai.
(4) Reth ko sukha lo.
Nishkarsh: dono hisse wapas apne asli roop mein mil gaye, jo saabit karta hai ki yeh mixture tha.
📰 Case-Based Question
Ramesh ji ek chai ki dukaan chalate hain. Subah woh chai mein kam cheeni dalte hain kyunki log “kam meethi” maangte hain. Shaam ko bachche aate hain, toh zyada cheeni dalte hain. Dukaan sadak ke paas hai, isliye counter pe roz dhool jam jaati hai. Ek din unhone ek glass mein lime water rakha aur shaam tak use doodhiya paaya.
Q1. Kya chai ek mixture hai? Kahani se ek saboot do.
Haan. Cheeni ki matra subah kam aur shaam ko zyada hoti hai, phir bhi woh chai hi rehti hai. Matra badalna mixture ki pehchaan hai.
Q2. Counter pe jamti dhool hawa ke baare mein kya batati hai?
Hawa mein dhool ke kan hote hain, yani hawa ek mixture hai. Sadak ke paas dhool zyada hoti hai.
Q3. Lime water doodhiya kyun hua?
Hawa ki carbon dioxide lime water se milkar safed na-ghulne wali cheez banati hai, isliye woh doodhiya hua.
Q4. Ramesh ji ki dukaan ke paas ki hawa aur kisi jungle ki hawa mein kya fark hoga?
Dukaan ke paas (sadak, gaadiyan, bheed) dhool aur CO₂ zyada hogi. Jungle mein dhool kam hogi. Dono jagah hawa mixture hi hai, bas hisson ki matra alag hai.
🚀 HOTS
1. Ek band kamre mein 30 bachche 2 ghante baithe hain. Kamre ki hawa mein kya badlega, aur kyun?
CO₂ aur nami (jal-vashp) badhegi, kyunki saans chhodne mein dono nikalte hain, aur oxygen thodi ghategi. Hawa ka mixture wahi rahega, bas hisson ki matra badlegi. Isliye kamre mein khidki khuli rakhni chahiye.
2. Priya kehti hai: “Agar nimbu pani se paani uda dein, toh nimbu pani ka swaad wala kuch nahi bachega.” Kya woh sahi hai?
Poori tarah nahi. Paani udne pe cheeni aur namak bach jayenge, jo mixture ke hisse the. Nimbu ke ras ka bhi kuch hissa bachega. Isse saabit hota hai ki ghule hue hisse andar the, gayab nahi hue.
3. Mixture ki matra kuch bhi ho sakti hai, phir bhi doctor ke ORS ke packet pe namak aur cheeni ki matra pakki likhi hoti hai. Kya ORS mixture nahi hai?
ORS mixture hi hai. Pakki matra sharir ki zaroorat ke liye likhi hai, mixture banne ke liye nahi. Namak-cheeni kam ya zyada dalo, tab bhi mixture banega, bas sharir ke liye utna faydemand nahi hoga.
🏆 Olympiad Corner
1. Hawa ke 500 L mein lagbhag kitni nitrogen hogi? (a) 105 L (b) 390 L (c) 450 L (d) 78 L
✅ (b) 390 L: 500 ka 78% = 500 × 78 ÷ 100 = 390 L. (a) 105 L oxygen hogi (21%). (d) 78 L tab hota jab hawa 100 L hoti.
2. Inme se kis jodi ko chumbak se alag kar sakte hain? (a) Namak + cheeni (b) Reth + lohe ki keelein (c) Paani + doodh (d) Chawal + daal
✅ (b): sirf loha chumbak se chipakta hai. Baaki jodiyon mein koi bhi hissa chumbak se nahi chipakta.
3. Ek bachcha kehta hai: “Hawa uniform mixture hai, isliye har jagah ki hawa mein dhool barabar hogi.” Iska sabse sahi jawab kya hai? (a) Sahi hai (b) Galat: uniform ka matlab hai gases ka mel ek jaisa hai, par dhool aur nami jagah ke hisaab se badalti hai (c) Galat: hawa mixture hi nahi hai (d) Sahi: kyunki dhool bhi gas hai
✅ (b): gases ka mel ek jaisa rehta hai, par dhool aur nami ki matra jagah-jagah alag hoti hai. (c) hawa mixture hai. (d) dhool gas nahi, chhote thos kan hain.
📚 Aur Padho (External Reference)
- NCERT Class 8 Science Curiosity, Chapter 8 (official PDF)
- DIKSHA: Sarkar ka free learning platform, NCERT ke videos ke liye
💖 CharuMam Motivation
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