Rozmarra mein Neutralisation
Class 7 Science · Chapter 2: Padaarthon ki Khoj: Acidic, Basic aur Neutral · NCERT Curiosity section 2.3
Seekho
Cheenti ka kaatna: Zoya ped se tikti hai aur laal cheenti kaat leti hai. Cheenti ek acid (formic acid) daalti hai, jo jalta hai. Uska bhai us jagah geela baking soda, ek base, malta hai, aur dard kam hota hai: acid neutralise ho gaya.
Mitti: zyaada rasaayanik khaad mitti ko acidic bana sakti hai, aur paudhe theek nahi badhte. Kisaan choona (base) milaate hain. Agar mitti bahut basic ho, to gobar khaad ya patton ki compost milaate hain, jo acid chhodti hai. Kabhi neutral mitti mein bhi kamzor paudhe, kyunki poshak tatvon ki kami.
Factory: factory ke paas ki jheel mein machhliyan mar rahi hain. Agar kachra acidic hai, to chhodne se pehle use basic padaarth se neutralise karna chahiye, taaki paani jeevon ke liye surakshit rahe.
Rahasya sulajh gaya: mele mein safed kaagazon par haldi lagi thi, aur sandesh saabun ke ghol se likha tha. Ya chhidkaav mein haldi thi aur shabd saabun se. Jahan saabun haldi se mila, akshar laal ho gaye!
Explore: acidic, basic ya neutral?
- Har padaarth ko prakriti se sort karo.
Yaad rakho
- Base acidic dank ko shaant karta hai; choona acidic mitti, compost basic mitti theek karti hai.
- Acidic factory kachra chhodne se pehle neutralise karna chahiye.
Quick check
Bahut acidic mitti mein kya milaayein?
- choona
- sirka
- neembu ras
- aur khaad
Answer
choona. Choona base hai aur acidic mitti ko neutralise karta hai.
Socho
Neel ki aankhon par patti hai aur use do anjaan ghol diye gaye. Acidic ya basic jaanne ke liye kaunsa indicator use kare?
Ek answer
Pyaaz mein bhige kapde jaisa olfactory indicator: base mein uski gandh badalti hai, to wo rang ki jagah gandh se bata sakta hai.
Practice
Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.